Fix name convention issue

Rename modules:
	workflow-designer-init to sdc-workflow-designer-init
	workflow-designer-be to sdc-workflow-designer-be
	workflow-designer-ui to sdc-workflow-designer-ui
Rename docker images:
	onap/workflow-init to onap/sdc-workflow-init
	onap/workflow-backend to onap/sdc-workflow-backend
	onap/workflow-frontend to onap/sdc-workflow-frontend

List of changed files:
	modified:   README.md
	modified:   docker-compose/debug.yml
	modified:   docker-compose/docker-compose.yml
	modified:   pom.xml
	modified:   sdc-workflow-bdd/pom.xml
	modified:   sdc-workflow-designer-be/pom.xml
	modified:   sdc-workflow-designer-init/pom.xml
	modified:   sdc-workflow-designer-ui/pom.xml
	modified:   sdc-workflow-designer-ui/src/main/frontend/yarn.lock
	modified:   version.properties

All others changes are relaited to rename/move.

Change-Id: Ic989b6347b815f85e77e23fc8d7884c05b650a27
Issue-ID: SDC-2334
Issue-ID: SDC-2335
Signed-off-by: Vasyl Razinkov <vasyl.razinkov@est.tech>

99 files changed, 5271 insertions, 0 deletions

diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/SpringBootWebApplication.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/SpringBootWebApplication.java
new file mode 100644
index 00000000..87de212e
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/SpringBootWebApplication.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
+import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan( {"org.onap.sdc.common", "org.onap.sdc.workflow"})
+public class SpringBootWebApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootWebApplication.class, args);
+    }
+
+    @Bean
+    public ConfigurableServletWebServerFactory webServerFactory() {
+        return new JettyServletWebServerFactory();
+    }
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ActivitySpecController.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ActivitySpecController.java
new file mode 100644
index 00000000..ac72d46e
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ActivitySpecController.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+import static org.onap.sdc.workflow.api.RestParams.USER_ID_HEADER;
+import static org.onap.sdc.workflow.services.ActivitySpecConstant.VERSION_ID_DEFAULT_VALUE;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import java.util.stream.Collectors;
+import javax.validation.Valid;
+import org.onap.sdc.workflow.api.mappers.ActivitySpecDtoMapper;
+import org.onap.sdc.workflow.api.types.CollectionResponse;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecActionRequest;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecCreateResponse;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecDataResponse;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecRequest;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecResponse;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+import org.onap.sdc.workflow.services.ActivitySpecManager;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RequestMapping(value = "/v1.0/activity-spec")
+@Api("Activity Specs")
+@RestController("activitySpecController")
+@Validated
+public class ActivitySpecController {
+
+    private final ActivitySpecManager activitySpecManager;
+    private final ActivitySpecDtoMapper activitySpecDtoMapper;
+
+    @Autowired
+    public ActivitySpecController(@Qualifier("activitySpecManager") ActivitySpecManager activitySpecManager,
+            ActivitySpecDtoMapper activitySpecDtoMapper) {
+        this.activitySpecManager = activitySpecManager;
+        this.activitySpecDtoMapper = activitySpecDtoMapper;
+    }
+
+    @GetMapping
+    @ApiOperation(value = "List activity specs", responseContainer = "List")
+    @ApiImplicitParam(name = USER_ID_HEADER, required = true, dataType = "string", paramType = "header")
+    public CollectionResponse<ActivitySpecResponse> list(@ApiParam(value = "List activity specs based on status filter",
+            allowableValues = "Draft,Certified,Deprecated,Deleted") @RequestParam(name = "status", required = false)
+                                                                 String versionStatus) {
+        return new CollectionResponse<>(
+                activitySpecManager.list(versionStatus).stream().map(activitySpecDtoMapper::toActivitySpecResponse)
+                        .collect(Collectors.toList()));
+    }
+
+    @PostMapping
+    @ApiOperation(value = "Create Activity Spec")
+    @ApiImplicitParam(name = USER_ID_HEADER, required = true, dataType = "string", paramType = "header")
+    public ResponseEntity<ActivitySpecCreateResponse> create(@Valid @RequestBody ActivitySpecRequest request) {
+        ActivitySpecEntity activitySpec =
+                activitySpecManager.createActivitySpec(activitySpecDtoMapper.fromActivitySpecRequest(request));
+        return new ResponseEntity<>(new ActivitySpecCreateResponse(activitySpec.getId(),activitySpec.getVersionId()),
+                HttpStatus.CREATED);
+    }
+
+    @GetMapping("/{id}/versions/{versionId}")
+    @ApiOperation(value = "Get Activity Spec")
+    @ApiImplicitParam(name = USER_ID_HEADER, required = true, dataType = "string", paramType = "header")
+    public ActivitySpecDataResponse get(@ApiParam(value = "Activity Spec Id") @PathVariable("id") String activitySpecId,
+            @ApiParam(value = "Version Id", defaultValue = VERSION_ID_DEFAULT_VALUE) @PathVariable("versionId")
+                    String versionId) {
+        return activitySpecDtoMapper.toActivitySpecDataResponse(
+                activitySpecManager.get(new ActivitySpecEntity(activitySpecId, versionId)));
+    }
+
+    @PutMapping("/{id}/versions/{versionId}")
+    @ApiOperation(value = "Update Activity Spec")
+    @ApiImplicitParam(name = USER_ID_HEADER, required = true, dataType = "string", paramType = "header")
+    public void update(@Valid @RequestBody ActivitySpecRequest request,
+            @ApiParam(value = "Activity Spec Id") @PathVariable("id") String activitySpecId,
+            @ApiParam(value = "Version Id", defaultValue = VERSION_ID_DEFAULT_VALUE) @PathVariable("versionId")
+                    String versionId) {
+        ActivitySpecEntity activitySpec = activitySpecDtoMapper.fromActivitySpecRequest(request);
+        activitySpec.setId(activitySpecId);
+        activitySpec.setVersionId(versionId);
+
+        activitySpecManager.update(activitySpec);
+    }
+
+    @PutMapping("/{id}/versions/{versionId}/actions")
+    @ApiOperation(value = "Actions on a activity spec",
+            notes = "Performs one of the following actions on a activity spec: |" + "CERTIFY: Certifies activity spec.|"
+                            + "DEPRECATE: Deprecates activity spec.|" + "DELETE: Deletes activity spec.")
+    @ApiImplicitParam(name = USER_ID_HEADER, required = true, dataType = "string", paramType = "header")
+    public void actOn(@Valid @RequestBody ActivitySpecActionRequest request,
+            @ApiParam(value = "Activity Spec Id") @PathVariable("id") String activitySpecId,
+            @ApiParam(value = "Version Id", defaultValue = VERSION_ID_DEFAULT_VALUE) @PathVariable("versionId")
+                    String versionId) {
+        activitySpecManager
+                .actOnAction(new ActivitySpecEntity(activitySpecId, versionId), request.getAction());
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ArtifactAssociationService.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ArtifactAssociationService.java
new file mode 100644
index 00000000..2b24577a
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ArtifactAssociationService.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+import static org.apache.commons.codec.digest.DigestUtils.md5Hex;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.security.GeneralSecurityException;
+import java.security.KeyStore;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+import org.apache.http.conn.ssl.TrustStrategy;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+
+import java.util.Base64;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.http.HttpHost;
+import org.apache.http.conn.ssl.NoopHostnameVerifier;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
+import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.ssl.SSLContexts;
+import org.onap.sdc.workflow.api.types.dto.ArtifactDeliveriesRequestDto;
+import org.onap.sdc.workflow.persistence.types.ArtifactEntity;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.http.*;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestTemplate;
+
+import javax.net.ssl.SSLContext;
+
+
+@Component("ArtifactAssociationHandler")
+public class ArtifactAssociationService {
+
+    private static final String WORKFLOW_ARTIFACT_TYPE = "WORKFLOW";
+    private static final String WORKFLOW_ARTIFACT_DESCRIPTION = "Workflow Artifact Description";
+    private static final String USER_ID_HEADER = "USER_ID";
+    private static final String MD5_HEADER = "Content-MD5";
+    private static final String X_ECOMP_INSTANCE_ID_HEADER = "X-ECOMP-InstanceID";
+    private static final String INIT_ERROR_MSG =
+            "Failed while attaching workflow artifact to Operation in SDC. Parameters were not initialized: %s";
+    private static final String INIT_CLIENT_MSG =
+            "Failed while creating the HTTP client to SDC. Following exception: %s";
+    private static final Logger LOGGER = LoggerFactory.getLogger(ArtifactAssociationService.class);
+    @Value("${sdc.be.endpoint}")
+    private String sdcBeEndpoint;
+    @Value("${sdc.be.protocol}")
+    private String sdcBeProtocol;
+    @Value("${sdc.be.external.user}")
+    private String sdcUser;
+    @Value("${sdc.be.external.password}")
+    private String sdcPassword;
+
+    private RestTemplate restClient;
+
+    private KeyStore getKeyStore(String file, String password, String keyStoreType) throws IOException, GeneralSecurityException {
+        KeyStore keyStore = KeyStore.getInstance(keyStoreType);
+        File keyFile = new File(file);
+        try (FileInputStream inStr = new FileInputStream(keyFile)) {
+            keyStore.load(inStr, password.toCharArray());
+        }
+        return keyStore;
+
+    }
+
+
+    @Autowired
+    public ArtifactAssociationService(RestTemplateBuilder builder,
+                                      @Value("${server.ssl.trust-store}")
+                                              String truststorePath,
+                                      @Value("${server.ssl.trust-store-password}")
+                                              String truststorePassword,
+                                      @Value("${server.ssl.trust-store-type}")
+                                              String truststoreType,
+                                      @Value("${server.ssl.key-store}")
+                                              String keystorePath,
+                                      @Value("${server.ssl.key-password}")
+                                              String keystorePassword,
+                                      @Value("${server.ssl.key-store-type}")
+                                              String keystoreType,
+                                      @Value("${sdc.be.protocol}")
+                                              String protocol) {
+        if (protocol != null &&
+                !protocol.equalsIgnoreCase(HttpHost.DEFAULT_SCHEME_NAME)) {
+            try {
+                KeyStore trustStore = getKeyStore(truststorePath, truststorePassword, truststoreType);
+                KeyStore keyStore = getKeyStore(keystorePath, keystorePassword, keystoreType);
+
+                SSLContext sslcontext = SSLContexts.custom()
+                        .loadKeyMaterial(keyStore, keystorePassword.toCharArray())
+                        .loadTrustMaterial(trustStore, new TrustSelfSignedStrategy())
+                        .build();
+                SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
+                        sslcontext,
+                        new NoopHostnameVerifier()
+                );
+                CloseableHttpClient httpClient =
+                        HttpClients.custom()
+                                .setSSLSocketFactory(sslsf)
+                                .setSSLHostnameVerifier(new NoopHostnameVerifier())
+                                .build();
+                HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);
+                this.restClient = new RestTemplate(factory);
+            } catch (Exception e) {
+                LOGGER.error(String.format(INIT_CLIENT_MSG, e.getMessage()), e);
+            }
+        } else {
+            this.restClient = builder.build();
+        }
+    }
+
+    void setRestClient(RestTemplate restClient) {
+        this.restClient = restClient;
+    }
+
+    void setSdcBeEndpoint(String value) {
+        this.sdcBeEndpoint = value;
+    }
+
+    ResponseEntity<String> execute(String userId, ArtifactDeliveriesRequestDto deliveriesRequestDto,
+                                   ArtifactEntity artifactEntity) {
+
+        Optional<String> initializationState = parametersInitializationState();
+        if (initializationState.isPresent()) {
+            LOGGER.error(String.format(INIT_ERROR_MSG, initializationState.get()));
+            return ResponseEntity.status(HttpStatus.EXPECTATION_FAILED).body(String.format(INIT_ERROR_MSG, initializationState.get()));
+        }
+
+        String formattedArtifact;
+        try {
+            formattedArtifact = getFormattedWorkflowArtifact(artifactEntity);
+        } catch (IOException e) {
+            LOGGER.error("Failed while attaching workflow artifact to Operation in SDC", e);
+            return ResponseEntity.status(HttpStatus.EXPECTATION_FAILED).body(e.getMessage());
+        }
+
+        HttpEntity<String> request = new HttpEntity<>(formattedArtifact, createHeaders(userId, formattedArtifact));
+
+        return restClient.exchange(sdcBeProtocol + "://" + sdcBeEndpoint + "/" + deliveriesRequestDto.getEndpoint(),
+                HttpMethod.valueOf(deliveriesRequestDto.getMethod()), request, String.class);
+    }
+
+    Optional<String> parametersInitializationState() {
+        ArrayList<String> result = new ArrayList<>();
+        if (sdcBeEndpoint == null || sdcBeEndpoint.equals("")) {
+            result.add("SDC_ENDPOINT");
+        }
+        if (sdcBeProtocol == null || sdcBeProtocol.equals("")) {
+            result.add("SDC_PROTOCOL");
+        }
+        if (sdcUser == null || sdcUser.equals("")) {
+            result.add("SDC_USER");
+        }
+        if (sdcPassword == null || sdcPassword.equals("")) {
+            result.add("SDC_PASSWORD");
+        }
+
+        if (result.isEmpty() || this.restClient == null) {
+            return Optional.empty();
+        } else {
+            return Optional.of(result.toString());
+        }
+    }
+
+
+    private String getFormattedWorkflowArtifact(ArtifactEntity artifactEntity) throws IOException {
+
+        byte[] encodeBase64 = Base64.getEncoder().encode(IOUtils.toByteArray(artifactEntity.getArtifactData()));
+        String encodedPayloadData = new String(encodeBase64);
+
+        Map<String, String> artifactInfo = new HashMap<>();
+        artifactInfo.put("artifactName", artifactEntity.getFileName());
+        artifactInfo.put("payloadData", encodedPayloadData);
+        artifactInfo.put("artifactType", WORKFLOW_ARTIFACT_TYPE);
+        artifactInfo.put("description", WORKFLOW_ARTIFACT_DESCRIPTION);
+
+        ObjectMapper mapper = new ObjectMapper();
+        return mapper.writeValueAsString(artifactInfo);
+    }
+
+    private HttpHeaders createHeaders(String userId, String formattedArtifact) {
+        HttpHeaders headers = new HttpHeaders();
+        headers.add(USER_ID_HEADER, userId);
+        headers.add(HttpHeaders.AUTHORIZATION, createAuthorizationsHeaderValue(sdcUser, sdcPassword));
+        headers.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
+        headers.add(MD5_HEADER, calculateMD5Base64EncodedByString(formattedArtifact));
+        headers.add(X_ECOMP_INSTANCE_ID_HEADER, "InstanceId");
+        return headers;
+    }
+
+    private String calculateMD5Base64EncodedByString(String data) {
+        String calculatedMd5 = md5Hex(data);
+        // encode base-64 result
+        byte[] encodeBase64 = Base64.getEncoder().encode(calculatedMd5.getBytes());
+        return new String(encodeBase64);
+    }
+
+    private String createAuthorizationsHeaderValue(String username, String password) {
+        String auth = username + ":" + password;
+        byte[] encodedAuth = Base64.getEncoder().encode(auth.getBytes(Charset.forName("US-ASCII")));
+        return "Basic " + new String(encodedAuth);
+    }
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/DisableSwaggerController.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/DisableSwaggerController.java
new file mode 100644
index 00000000..12d4b06c
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/DisableSwaggerController.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright © 2019 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@Profile("!swagger")
+@RestController
+public class DisableSwaggerController {
+    @RequestMapping("swagger-ui.html")
+    public void swagger(HttpServletResponse response) {
+        response.setStatus(HttpStatus.NOT_FOUND.value());
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ExceptionsHandler.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ExceptionsHandler.java
new file mode 100644
index 00000000..70633d41
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/ExceptionsHandler.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+import static org.springframework.http.HttpStatus.BAD_REQUEST;
+import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR;
+import static org.springframework.http.HttpStatus.NOT_FOUND;
+import static org.springframework.http.HttpStatus.UNPROCESSABLE_ENTITY;
+
+import java.util.function.Function;
+import org.apache.commons.lang3.exception.ExceptionUtils;
+import org.apache.commons.text.RandomStringGenerator;
+import org.onap.sdc.workflow.api.types.ErrorResponse;
+import org.onap.sdc.workflow.api.types.UnexpectedErrorResponse;
+import org.onap.sdc.workflow.services.exceptions.EntityNotFoundException;
+import org.onap.sdc.workflow.services.exceptions.InvalidArtifactException;
+import org.onap.sdc.workflow.services.exceptions.UniqueValueViolationException;
+import org.onap.sdc.workflow.services.exceptions.VersionCreationException;
+import org.onap.sdc.workflow.services.exceptions.VersionModificationException;
+import org.onap.sdc.workflow.services.exceptions.VersionStateModificationException;
+import org.onap.sdc.workflow.services.exceptions.VersionStateModificationMissingArtifactException;
+import org.onap.sdc.workflow.services.exceptions.VersionStatusModificationException;
+import org.onap.sdc.workflow.services.exceptions.WorkflowModificationException;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.springframework.context.support.DefaultMessageSourceResolvable;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.ServletRequestBindingException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.WebRequest;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+
+@ControllerAdvice
+@RestController
+public class ExceptionsHandler extends ResponseEntityExceptionHandler {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ExceptionsHandler.class);
+
+    private static final String LOG_MSG = "Exception was mapped to {} response";
+    private static final String UNEXPECTED_ERROR_MSG = "Something bad happened. Please contact support with code %s";
+    private static final RandomStringGenerator CODE_GENERATOR =
+            new RandomStringGenerator.Builder().withinRange('A', 'Z').build();
+    private static final int CODE_LENGTH = 8;
+
+    private static final Function<Exception, UnexpectedErrorResponse> UNEXPECTED_EXCEPTION_MAPPER =
+            isDevInfoDisabled()
+                    ? e -> new UnexpectedErrorResponse(getUnexpectedErrorMessage())
+                    : e -> new UnexpectedErrorResponse(getUnexpectedErrorMessage(), ExceptionUtils.getStackTrace(e));
+
+    @Override
+    public ResponseEntity<Object> handleServletRequestBindingException(ServletRequestBindingException ex,
+            HttpHeaders headers, HttpStatus status, WebRequest request) {
+        LOG.debug(LOG_MSG, BAD_REQUEST, ex);
+        // Convert Spring-generated binding exceptions into the format of an application message
+        return new ResponseEntity<>(new ErrorResponse(ex.getMessage()), BAD_REQUEST);
+    }
+
+    @Override
+    protected final ResponseEntity<Object> handleMethodArgumentNotValid(final MethodArgumentNotValidException exception,
+            final HttpHeaders headers, final HttpStatus status, final WebRequest request) {
+        LOG.debug(LOG_MSG, BAD_REQUEST, exception);
+        String errorMsg = exception.getBindingResult().getFieldErrors().stream()
+                                  .map(DefaultMessageSourceResolvable::getDefaultMessage).findFirst()
+                                  .orElse(exception.getMessage());
+        return new ResponseEntity<>(new ErrorResponse(errorMsg), BAD_REQUEST);
+    }
+
+    @ExceptionHandler(EntityNotFoundException.class)
+    public final ResponseEntity<ErrorResponse> handleNotFoundException(Exception exception) {
+        LOG.debug(LOG_MSG, NOT_FOUND, exception);
+        return new ResponseEntity<>(new ErrorResponse(exception.getMessage()), NOT_FOUND);
+    }
+
+    @ExceptionHandler(
+            {InvalidArtifactException.class, VersionCreationException.class, VersionModificationException.class,
+                    VersionStateModificationException.class,
+                    VersionStateModificationMissingArtifactException.class,
+                    VersionStatusModificationException.class,
+                    UniqueValueViolationException.class,
+                    WorkflowModificationException.class})
+    public final ResponseEntity<ErrorResponse> handleUnprocessableEntityException(Exception exception) {
+        LOG.debug(LOG_MSG, UNPROCESSABLE_ENTITY, exception);
+        return new ResponseEntity<>(new ErrorResponse(exception.getMessage()), UNPROCESSABLE_ENTITY);
+    }
+
+    @ExceptionHandler(Exception.class)
+    public final ResponseEntity<UnexpectedErrorResponse> handleUnexpectedException(Exception exception) {
+        UnexpectedErrorResponse response = UNEXPECTED_EXCEPTION_MAPPER.apply(exception);
+        LOG.error(response.getMessage(), exception);
+        return new ResponseEntity<>(response, INTERNAL_SERVER_ERROR);
+    }
+
+    private static boolean isDevInfoDisabled() {
+        return Boolean.FALSE.toString().equalsIgnoreCase(System.getProperty("errors.includeDevInfo"));
+    }
+
+    private static String getUnexpectedErrorMessage() {
+        return String.format(UNEXPECTED_ERROR_MSG, CODE_GENERATOR.generate(CODE_LENGTH));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/RestParams.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/RestParams.java
new file mode 100644
index 00000000..c22a0c20
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/RestParams.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+public class RestParams {
+
+    private RestParams() {
+    }
+
+    public static final String USER_ID_HEADER = "USER_ID";
+    public static final String OFFSET = "offset";
+    public static final String LIMIT = "limit";
+    public static final String SORT = "sort";
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/WorkflowController.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/WorkflowController.java
new file mode 100644
index 00000000..ff06f828
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/WorkflowController.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+import static org.onap.sdc.workflow.api.RestParams.LIMIT;
+import static org.onap.sdc.workflow.api.RestParams.OFFSET;
+import static org.onap.sdc.workflow.api.RestParams.SORT;
+import static org.onap.sdc.workflow.services.types.PagingConstants.DEFAULT_LIMIT;
+import static org.onap.sdc.workflow.services.types.PagingConstants.DEFAULT_OFFSET;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiImplicitParams;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import javax.validation.Valid;
+import org.onap.sdc.workflow.api.types.Paging;
+import org.onap.sdc.workflow.api.types.Sorting;
+import org.onap.sdc.workflow.api.types.VersionStatesFormatter;
+import org.onap.sdc.workflow.api.types.WorkflowStatusDto;
+import org.onap.sdc.workflow.services.WorkflowManager;
+import org.onap.sdc.workflow.services.WorkflowVersionManager;
+import org.onap.sdc.workflow.services.annotations.UserId;
+import org.onap.sdc.workflow.services.types.ArchivingStatus;
+import org.onap.sdc.workflow.services.types.Page;
+import org.onap.sdc.workflow.services.types.PagingRequest;
+import org.onap.sdc.workflow.services.types.RequestSpec;
+import org.onap.sdc.workflow.services.types.SortingRequest;
+import org.onap.sdc.workflow.services.types.Workflow;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import springfox.documentation.annotations.ApiIgnore;
+
+@RequestMapping("/wf/workflows")
+@Api("Workflows")
+@RestController("workflowController")
+public class WorkflowController {
+
+    private final WorkflowManager workflowManager;
+    private final WorkflowVersionManager workflowVersionManager;
+
+    @Autowired
+    public WorkflowController(@Qualifier("workflowManager") WorkflowManager workflowManager,
+            @Qualifier("workflowVersionManager") WorkflowVersionManager workflowVersionManager) {
+        this.workflowManager = workflowManager;
+        this.workflowVersionManager = workflowVersionManager;
+    }
+
+    @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
+    @ApiOperation("List workflows")
+    @ApiImplicitParams({@ApiImplicitParam(name = "versionState", dataType = "string", paramType = "query",
+            allowableValues = "DRAFT,CERTIFIED", value = "Filter by version state"),
+            @ApiImplicitParam(name = OFFSET, dataType = "string", paramType = "query", defaultValue = "0",
+                    value = "Index of the starting item"),
+            @ApiImplicitParam(name = LIMIT, dataType = "string", paramType = "query", defaultValue = "200",
+                    value = "Number of returned items"),
+            @ApiImplicitParam(name = SORT, dataType = "string", paramType = "query", defaultValue = "name:asc",
+                    value = "Sorting criteria in the format: property:(asc|desc). Default sort order is ascending.",
+                    allowableValues = "name:asc,name:desc"),
+            @ApiImplicitParam(name = "searchNameFilter", dataType = "string", paramType = "query",
+                    value = "Filter by workflow name"),
+            @ApiImplicitParam(name = "archiving", dataType = "string", paramType = "query",
+                    allowableValues = "ACTIVE,ARCHIVED", value = "Filter by workflow status")})
+    public Page<Workflow> list(@ApiIgnore String archiving, @ApiIgnore String searchNameFilter,
+            @ApiIgnore VersionStatesFormatter versionStateFilter, @ApiIgnore Paging paging,
+            @ApiIgnore Sorting sorting, @UserId String user) {
+        return workflowManager.list(archiving, searchNameFilter, versionStateFilter.getVersionStates(), initRequestSpec(paging, sorting));
+    }
+
+    @PostMapping(consumes = MediaType.APPLICATION_JSON_VALUE)
+    @ApiOperation("Create workflow")
+    public ResponseEntity<Workflow> create(@Validated @RequestBody Workflow workflow, @UserId String user) {
+        return new ResponseEntity<>(workflowManager.create(workflow), HttpStatus.CREATED);
+    }
+
+    @GetMapping(path = "/{workflowId}")
+    @ApiOperation("Get workflow")
+    public Workflow get(@PathVariable("workflowId") String workflowId,
+            @ApiParam(value = "Expand workflow data", allowableValues = "versions")
+            @RequestParam(value = "expand", required = false) String expand, @UserId String user) {
+        Workflow workflow = new Workflow();
+        workflow.setId(workflowId);
+        Workflow retrievedWorkflow = workflowManager.get(workflow);
+        if ("versions".equals(expand)) {
+            retrievedWorkflow.setVersions(workflowVersionManager.list(workflowId, null));
+        }
+        return retrievedWorkflow;
+    }
+
+    @PutMapping(path = "/{workflowId}", consumes = MediaType.APPLICATION_JSON_VALUE)
+    @ApiOperation("Update workflow")
+    public Workflow update(@RequestBody Workflow workflow, @PathVariable("workflowId") String workflowId,
+            @UserId String user) {
+        workflow.setId(workflowId);
+        workflowManager.update(workflow);
+        return workflow;
+    }
+
+    @PostMapping(path = "/{workflowId}/archiving", consumes = MediaType.APPLICATION_JSON_VALUE)
+    @ApiOperation("Update workflow status")
+    public ResponseEntity updateStatus(@RequestBody @Valid WorkflowStatusDto request, @PathVariable("workflowId") String workflowId,
+            @UserId String user) {
+        workflowManager.updateStatus(workflowId, ArchivingStatus.valueOf(request.getStatus()));
+        return new ResponseEntity(HttpStatus.OK);
+    }
+
+    private RequestSpec initRequestSpec(Paging paging, Sorting sorting) {
+        return new RequestSpec(new PagingRequest(paging.getOffset() == null ? DEFAULT_OFFSET : paging.getOffset(),
+                paging.getLimit() == null ? DEFAULT_LIMIT : paging.getLimit()),
+                SortingRequest.builder().sorts(sorting.getSorts()).build());
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/WorkflowVersionController.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/WorkflowVersionController.java
new file mode 100644
index 00000000..213cd713
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/WorkflowVersionController.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import java.util.stream.Collectors;
+import javax.validation.Valid;
+import org.onap.sdc.workflow.api.mappers.WorkflowVersionDtoMapper;
+import org.onap.sdc.workflow.api.types.CollectionResponse;
+import org.onap.sdc.workflow.api.types.VersionStateDto;
+import org.onap.sdc.workflow.api.types.VersionStatesFormatter;
+import org.onap.sdc.workflow.api.types.WorkflowVersionRequest;
+import org.onap.sdc.workflow.api.types.WorkflowVersionResponse;
+import org.onap.sdc.workflow.api.types.dto.ArtifactDeliveriesRequestDto;
+import org.onap.sdc.workflow.persistence.types.ArtifactEntity;
+import org.onap.sdc.workflow.services.WorkflowVersionManager;
+import org.onap.sdc.workflow.services.annotations.UserId;
+import org.onap.sdc.workflow.services.types.WorkflowVersion;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+import springfox.documentation.annotations.ApiIgnore;
+
+@RequestMapping("/wf/workflows/{workflowId}/versions")
+@Api("Workflow versions")
+@RestController("workflowsVersionController")
+public class WorkflowVersionController {
+
+    private final WorkflowVersionManager versionManager;
+    private final WorkflowVersionDtoMapper versionDtoMapper;
+    private final ArtifactAssociationService associationHandler;
+
+    @Autowired
+    public WorkflowVersionController(@Qualifier("workflowVersionManager") WorkflowVersionManager versionManager,
+            WorkflowVersionDtoMapper versionDtoMapper,
+            @Qualifier("ArtifactAssociationHandler") ArtifactAssociationService artifactAssociationHandler) {
+        this.versionManager = versionManager;
+        this.versionDtoMapper = versionDtoMapper;
+        this.associationHandler = artifactAssociationHandler;
+    }
+
+    @GetMapping
+    @ApiOperation("List workflow versions")
+    @ApiImplicitParam(name = "state", dataType = "string", paramType = "query", allowableValues = "DRAFT,CERTIFIED",
+            value = "Filter by state")
+    public CollectionResponse<WorkflowVersionResponse> list(@PathVariable("workflowId") String workflowId,
+            @ApiIgnore VersionStatesFormatter stateFilter, @UserId String user) {
+        return new CollectionResponse<>(versionManager.list(workflowId, stateFilter.getVersionStates()).stream()
+                                                .map(versionDtoMapper::workflowVersionToResponse)
+                                                .collect(Collectors.toList()));
+    }
+
+    @PostMapping
+    @ApiOperation("Create workflow version")
+    public ResponseEntity<WorkflowVersionResponse> create(@RequestBody @Valid WorkflowVersionRequest request,
+            @PathVariable("workflowId") String workflowId,
+            @RequestParam(value = "baseVersionId", required = false) String baseVersionId, @UserId String user) {
+        WorkflowVersionResponse createdVersion = versionDtoMapper.workflowVersionToResponse(
+                versionManager.create(workflowId, baseVersionId, versionDtoMapper.requestToWorkflowVersion(request)));
+        return new ResponseEntity<>(createdVersion, HttpStatus.CREATED);
+    }
+
+    @GetMapping("/{versionId}")
+    @ApiOperation("Get workflow version")
+    public WorkflowVersionResponse get(@PathVariable("workflowId") String workflowId,
+            @PathVariable("versionId") String versionId, @UserId String user) {
+        return versionDtoMapper.workflowVersionToResponse(versionManager.get(workflowId, versionId));
+    }
+
+    @PutMapping("/{versionId}")
+    @ApiOperation("Update workflow version")
+    public void update(@RequestBody @Valid WorkflowVersionRequest request,
+            @PathVariable("workflowId") String workflowId, @PathVariable("versionId") String versionId,
+            @UserId String user) {
+        WorkflowVersion version = versionDtoMapper.requestToWorkflowVersion(request);
+        version.setId(versionId);
+        versionManager.update(workflowId, version);
+    }
+
+    @GetMapping("/{versionId}/state")
+    @ApiOperation("Get workflow version state")
+    public VersionStateDto getState(@PathVariable("workflowId") String workflowId,
+            @PathVariable("versionId") String versionId, @UserId String user) {
+        return new VersionStateDto(versionManager.getState(workflowId, versionId));
+    }
+
+    @PostMapping("/{versionId}/state")
+    @ApiOperation("Update workflow version state")
+    public VersionStateDto updateState(@RequestBody VersionStateDto state,
+            @PathVariable("workflowId") String workflowId, @PathVariable("versionId") String versionId,
+            @UserId String user) {
+        versionManager.updateState(workflowId, versionId, state.getName());
+        return new VersionStateDto(state.getName());
+    }
+
+    @PostMapping("/{versionId}/artifact-deliveries")
+    @ApiOperation("upload of artifact to VF operation workflow")
+    public ResponseEntity<String> artifactDeliveries(@RequestBody ArtifactDeliveriesRequestDto deliveriesRequestDto,
+            @PathVariable("workflowId") String workflowId, @PathVariable("versionId") String versionId,
+            @UserId String user) {
+        return associationHandler
+                       .execute(user, deliveriesRequestDto, versionManager.getArtifact(workflowId, versionId));
+    }
+
+    @PutMapping("/{versionId}/artifact")
+    @ApiOperation("Create/update artifact of a version")
+    public void uploadArtifact(@RequestBody MultipartFile fileToUpload, @PathVariable("workflowId") String workflowId,
+            @PathVariable("versionId") String versionId, @UserId String user) {
+        versionManager.uploadArtifact(workflowId, versionId, fileToUpload);
+    }
+
+    @GetMapping("/{versionId}/artifact")
+    @ApiOperation("Download workflow version artifact")
+    public ResponseEntity<Resource> getArtifact(@PathVariable("workflowId") String workflowId,
+            @PathVariable("versionId") String versionId, @UserId String user) {
+        ArtifactEntity artifact = versionManager.getArtifact(workflowId, versionId);
+
+        return ResponseEntity.ok()
+                       .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=" + artifact.getFileName())
+                       .contentType(MediaType.APPLICATION_OCTET_STREAM)
+                       .body(new InputStreamResource(artifact.getArtifactData()));
+    }
+
+    @DeleteMapping("/{versionId}/artifact")
+    @ApiOperation("Delete workflow version artifact")
+    public void deleteArtifact(@PathVariable("workflowId") String workflowId,
+            @PathVariable("versionId") String versionId, @UserId String user) {
+        versionManager.deleteArtifact(workflowId, versionId);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/mappers/ActivitySpecDtoMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/mappers/ActivitySpecDtoMapper.java
new file mode 100644
index 00000000..cea7c878
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/mappers/ActivitySpecDtoMapper.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.mappers;
+
+import org.mapstruct.Mapper;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecDataResponse;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecRequest;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecResponse;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+
+@Mapper(componentModel = "spring")
+public interface ActivitySpecDtoMapper {
+
+    ActivitySpecResponse toActivitySpecResponse(ActivitySpecEntity activitySpec);
+
+    ActivitySpecDataResponse toActivitySpecDataResponse(ActivitySpecEntity activitySpec);
+
+    ActivitySpecEntity fromActivitySpecRequest(ActivitySpecRequest request);
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/mappers/WorkflowVersionDtoMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/mappers/WorkflowVersionDtoMapper.java
new file mode 100644
index 00000000..120b0d23
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/mappers/WorkflowVersionDtoMapper.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.mappers;
+
+import org.mapstruct.Mapper;
+import org.onap.sdc.workflow.api.types.WorkflowVersionRequest;
+import org.onap.sdc.workflow.api.types.WorkflowVersionResponse;
+import org.onap.sdc.workflow.services.types.WorkflowVersion;
+
+@Mapper(componentModel = "spring")
+public interface WorkflowVersionDtoMapper {
+
+    WorkflowVersion requestToWorkflowVersion(WorkflowVersionRequest request);
+
+    WorkflowVersionResponse workflowVersionToResponse(WorkflowVersion workflowVersion);
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/swagger/UserIdReader.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/swagger/UserIdReader.java
new file mode 100644
index 00000000..d16c9407
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/swagger/UserIdReader.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.swagger;
+
+import static org.onap.sdc.workflow.api.RestParams.USER_ID_HEADER;
+
+import com.fasterxml.classmate.TypeResolver;
+import com.google.common.base.Optional;
+import org.onap.sdc.workflow.services.annotations.UserId;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+import springfox.documentation.service.ResolvedMethodParameter;
+import springfox.documentation.spi.DocumentationType;
+import springfox.documentation.spi.service.ParameterBuilderPlugin;
+import springfox.documentation.spi.service.contexts.ParameterContext;
+import springfox.documentation.swagger.common.SwaggerPluginSupport;
+
+/**
+ * This component is neccesary because swagger cannot find a custom annotations in API.
+ * This is needed to find specifically the {@link UserId} annotation
+ */
+@Component
+@Order(SwaggerPluginSupport.SWAGGER_PLUGIN_ORDER + 1000)
+public class UserIdReader implements ParameterBuilderPlugin {
+
+    private static final String HEADER = "header";
+    private final TypeResolver resolver;
+
+    public UserIdReader(TypeResolver resolver) {
+        this.resolver = resolver;
+    }
+
+    @Override
+    public void apply(ParameterContext parameterContext) {
+        ResolvedMethodParameter methodParameter = parameterContext.resolvedMethodParameter();
+        Optional<UserId> requestParam = methodParameter.findAnnotation(UserId.class);
+        if (requestParam.isPresent()) {
+            parameterContext.parameterBuilder().parameterType(HEADER).name(USER_ID_HEADER)
+                            .type(resolver.resolve(String.class));
+        }
+    }
+
+    @Override
+    public boolean supports(DocumentationType documentationType) {
+        return true;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/CollectionResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/CollectionResponse.java
new file mode 100644
index 00000000..1734dd6c
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/CollectionResponse.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import java.util.Collection;
+import lombok.Data;
+
+@Data
+public class CollectionResponse<T> {
+
+    private int total;
+    private Collection<T> items;
+
+    public CollectionResponse(Collection<T> items) {
+        this.items = items;
+        this.total = items.size();
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/ErrorResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/ErrorResponse.java
new file mode 100644
index 00000000..45f54341
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/ErrorResponse.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class ErrorResponse {
+
+    private String message;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Paging.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Paging.java
new file mode 100644
index 00000000..7e47f6d6
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Paging.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import static org.onap.sdc.workflow.services.types.PagingConstants.MAX_LIMIT;
+
+import java.util.Optional;
+import lombok.Getter;
+
+@Getter
+public class Paging {
+
+    private Integer offset;
+    private Integer limit;
+
+    public void setOffset(String offset) {
+        getIntValue(offset).ifPresent(integer -> this.offset = integer);
+    }
+
+    public void setLimit(String limit) {
+        getIntValue(limit).map(integer -> integer > MAX_LIMIT ? MAX_LIMIT : integer).ifPresent(integer -> {
+            if (integer != 0) {
+                this.limit = integer;
+            }
+        });
+    }
+
+    private static Optional<Integer> getIntValue(String value) {
+        try {
+            int intValue = Integer.parseInt(value);
+            return intValue < 0 ? Optional.empty() : Optional.of(intValue);
+        } catch (NumberFormatException e) {
+            return Optional.empty();
+        }
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Parameter.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Parameter.java
new file mode 100644
index 00000000..f5bbecec
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Parameter.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Pattern;
+import lombok.Data;
+import org.onap.sdc.workflow.persistence.types.ParameterType;
+
+@Data
+public class Parameter {
+    @NotBlank(message = "Parameter Name may not be blank")
+    @Pattern(regexp = "[A-Za-z0-9_ ]+", message = "Parameter name must contain only letters, digits and underscores")
+    private String name;
+    @NotNull
+    private ParameterType type;
+    @NotNull
+    private boolean mandatory;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Sorting.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Sorting.java
new file mode 100644
index 00000000..38b579b2
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/Sorting.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+import lombok.Getter;
+import org.onap.sdc.workflow.services.types.Sort;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+
+@Getter
+public class Sorting {
+
+    private static final String SORTS_DELIMITER = ",";
+    private static final String DIRECTION_DELIMITER = ":";
+    private static final String ASC = "asc";
+    private static final String DESC = "desc";
+    private static final Logger LOGGER = LoggerFactory.getLogger(Sorting.class);
+
+    private List<Sort> sorts = Collections.emptyList();
+
+    public void setSort(String sortString) {
+        this.sorts = Arrays.stream(sortString.split(SORTS_DELIMITER))
+                             .map(Sorting::formatSort)
+                             .filter(Objects::nonNull)
+                             .collect(Collectors.toList());
+    }
+
+    private static Sort formatSort(String sort) {
+        String[] tokens = sort.split(DIRECTION_DELIMITER, 2);
+
+        return tokens.length == 2
+                       ? formatSingleSort(tokens[0], tokens[1])
+                       : new Sort(tokens[0], true);
+    }
+
+    private static Sort formatSingleSort(String property, String direction) {
+        if (ASC.equalsIgnoreCase(direction)) {
+            return new Sort(property, true);
+        }
+        if (DESC.equalsIgnoreCase(direction)) {
+            return new Sort(property, false);
+        }
+        LOGGER.warn("Sorting direction {} of property {} is invalid. Allowed direction values: asc, desc.", direction,
+                property);
+        return null;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/UnexpectedErrorResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/UnexpectedErrorResponse.java
new file mode 100644
index 00000000..8cf513a2
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/UnexpectedErrorResponse.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import lombok.Getter;
+
+@Getter
+public class UnexpectedErrorResponse extends ErrorResponse {
+
+    private String devInfo;
+
+    public UnexpectedErrorResponse(String message) {
+        super(message);
+    }
+
+    public UnexpectedErrorResponse(String message, String devInfo) {
+        super(message);
+        this.devInfo = devInfo;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/VersionStateDto.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/VersionStateDto.java
new file mode 100644
index 00000000..8e6dd09f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/VersionStateDto.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import java.util.List;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+
+@Data
+@NoArgsConstructor
+public class VersionStateDto {
+
+    private WorkflowVersionState name;
+    private List<WorkflowVersionState> nextStates;
+
+    public VersionStateDto(WorkflowVersionState state) {
+        name = state;
+        nextStates = state.getNextStates();
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/VersionStatesFormatter.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/VersionStatesFormatter.java
new file mode 100644
index 00000000..cc17f928
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/VersionStatesFormatter.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Set;
+import java.util.stream.Collectors;
+import lombok.Getter;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+
+@Getter
+public class VersionStatesFormatter {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(VersionStatesFormatter.class);
+
+    private Set<WorkflowVersionState> versionStates = null;
+
+    public void setVersionState(String value) {
+        this.versionStates = formatString(value);
+    }
+
+    public void setState(String value) {
+        setVersionState(value);
+    }
+
+    private static Set<WorkflowVersionState> formatString(String value) {
+        try {
+            return value == null ? null : Arrays.stream(value.split(",")).map(WorkflowVersionState::valueOf)
+                                                  .collect(Collectors.toSet());
+        } catch (IllegalArgumentException ex) {
+            LOGGER.warn("value {} is invalid and cannot be formatted to a set of version states, "
+                                + "therefore it set to empty set", value, ex);
+            return Collections.emptySet();
+        }
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowStatusDto.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowStatusDto.java
new file mode 100644
index 00000000..6e5ab1cf
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowStatusDto.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import lombok.Data;
+import org.onap.sdc.workflow.api.validation.ValidStatus;
+
+@Data
+public class WorkflowStatusDto {
+    @ValidStatus(message = "Invalid status. Allowable values are: ARCHIVED,ACTIVE.")
+    private String status;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowVersionRequest.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowVersionRequest.java
new file mode 100644
index 00000000..090f129a
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowVersionRequest.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import java.util.Collection;
+import java.util.Collections;
+import javax.validation.Valid;
+import lombok.Data;
+import org.onap.sdc.workflow.api.validation.NoDuplicates;
+
+@Data
+public class WorkflowVersionRequest {
+
+    private String name;
+    private String description;
+    @Valid
+    @NoDuplicates(message = "Inputs names must be unique")
+    private Collection<Parameter> inputs = Collections.emptyList();
+    @Valid
+    @NoDuplicates(message = "Outputs names must be unique")
+    private Collection<Parameter> outputs = Collections.emptyList();
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowVersionResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowVersionResponse.java
new file mode 100644
index 00000000..460d3d63
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/WorkflowVersionResponse.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types;
+
+import java.util.Date;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+
+@EqualsAndHashCode(callSuper = true)
+@Data
+public class WorkflowVersionResponse extends WorkflowVersionRequest {
+
+    private String id;
+    private String baseId;
+    private WorkflowVersionState state;
+    private boolean hasArtifact;
+    private Date creationTime;
+    private Date modificationTime;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecAction.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecAction.java
new file mode 100644
index 00000000..87a97fff
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecAction.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+public enum ActivitySpecAction {
+    CERTIFY, DEPRECATE, DELETE
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecActionRequest.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecActionRequest.java
new file mode 100644
index 00000000..8b469da4
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecActionRequest.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+import javax.validation.constraints.NotNull;
+
+@lombok.Data
+public class ActivitySpecActionRequest {
+
+    @NotNull
+    private ActivitySpecAction action;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecBase.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecBase.java
new file mode 100644
index 00000000..cf494c20
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecBase.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+import java.util.List;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Pattern;
+import lombok.Data;
+
+@Data
+abstract class ActivitySpecBase {
+
+    @NotBlank(message = "Mandatory name field is missing")
+    @Pattern(regexp = "^[a-zA-Z0-9-]*$", message = "name should match with \"^[a-zA-Z0-9-]*$\" pattern")
+    private String name;
+    private List<String> categoryList;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecCreateResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecCreateResponse.java
new file mode 100644
index 00000000..895c74e8
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecCreateResponse.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class ActivitySpecCreateResponse {
+
+    private String id;
+    private String versionId;
+}
+
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecDataResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecDataResponse.java
new file mode 100644
index 00000000..d4b1003f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecDataResponse.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+import lombok.EqualsAndHashCode;
+
+@lombok.Data
+@EqualsAndHashCode(callSuper = true)
+public class ActivitySpecDataResponse extends ActivitySpecRequest {
+
+    private String id;
+    private String status;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecRequest.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecRequest.java
new file mode 100644
index 00000000..972e99cc
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecRequest.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+import io.swagger.annotations.ApiModel;
+import java.util.List;
+import javax.validation.Valid;
+import lombok.EqualsAndHashCode;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecParameter;
+
+@ApiModel(value = "ActivitySpecRequest")
+@lombok.Data
+@EqualsAndHashCode(callSuper = true)
+public class ActivitySpecRequest extends ActivitySpecBase {
+
+    private String description;
+    @Valid
+    private List<ActivitySpecParameter> inputs;
+    @Valid
+    private List<ActivitySpecParameter> outputs;
+    private String type;
+    private String content;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecResponse.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecResponse.java
new file mode 100644
index 00000000..a061b3fd
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/ActivitySpecResponse.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.activityspec;
+
+import lombok.EqualsAndHashCode;
+
+@lombok.Data
+@EqualsAndHashCode(callSuper = true)
+public class ActivitySpecResponse extends ActivitySpecBase {
+
+    private String id;
+    private String status;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/dto/ArtifactDeliveriesRequestDto.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/dto/ArtifactDeliveriesRequestDto.java
new file mode 100644
index 00000000..5ec54ffb
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/dto/ArtifactDeliveriesRequestDto.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.types.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * This class is a simple data object for the Artifact-Deliveries API.
+ * It will be used to build a HTTP request to be sent to SDC external API.
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class ArtifactDeliveriesRequestDto {
+
+    /**
+     * The HTTP method (PUT, POST etc) that will be executed.
+     */
+    private String method;
+
+    /**
+     * The server to which the request will be sent. Correct format is &lt;IP&gt;:&lt;PORT&gt;.
+     */
+    private String endpoint;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ActivitySpecParameterNameValidator.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ActivitySpecParameterNameValidator.java
new file mode 100644
index 00000000..06818c9d
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ActivitySpecParameterNameValidator.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.validation;
+
+import java.util.Objects;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecParameter;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component("ActivitySpecParameterNameValidator")
+public class ActivitySpecParameterNameValidator implements ConstraintValidator<ValidName, ActivitySpecParameter> {
+
+    private String validationRegex;
+    private static final String defaultValidationRegex = "^\\S*$";
+    private String validationMessage;
+    private static final String defaultValidationMessage = "Input and Output names must not contain any spaces";
+
+    @Override
+    public boolean isValid(ActivitySpecParameter parameter, ConstraintValidatorContext context) {
+        Pattern pattern = Pattern.compile(validationRegex);
+        Matcher matcher = pattern.matcher(parameter.getName());
+        boolean isValid = matcher.find();
+        if (!isValid) {
+            context.disableDefaultConstraintViolation();
+            context.buildConstraintViolationWithTemplate(validationMessage).addConstraintViolation();
+        }
+        return isValid;
+    }
+
+    @Value("${activitySpec.parameterName.validation:" + defaultValidationRegex + "}")
+    void setValidationRegex(String regex) {
+        if (Objects.isNull(regex) || regex.equals("")) {
+            Objects.requireNonNull(regex);
+        } else {
+            validationRegex = regex;
+        }
+    }
+
+    @Value("${activitySpec.parameterName.validationMessage:" + defaultValidationMessage + "}")
+    void setValidationMessage(String message) {
+        if (Objects.isNull(message) || message.equals("")) {
+            Objects.requireNonNull(message);
+        } else {
+            validationMessage = message;
+        }
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ArchivingStatusValidator.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ArchivingStatusValidator.java
new file mode 100644
index 00000000..bfbf7580
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ArchivingStatusValidator.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.validation;
+
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+import org.onap.sdc.workflow.services.types.ArchivingStatus;
+
+public class ArchivingStatusValidator implements ConstraintValidator<ValidStatus, String> {
+
+    @Override
+    public boolean isValid(String value, ConstraintValidatorContext context) {
+        if (value == null) {
+            return false;
+        } else {
+            try {
+                Enum.valueOf(ArchivingStatus.class, value);
+                return true;
+            } catch (IllegalArgumentException var3) {
+                return false;
+            }
+        }
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/NoDuplicates.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/NoDuplicates.java
new file mode 100644
index 00000000..296e4387
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/NoDuplicates.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Target({ElementType.TYPE, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Constraint(validatedBy = {NoDuplicatesValidator.class})
+public @interface NoDuplicates {
+
+    String message();
+
+    Class<?>[] groups() default {};
+
+    Class<? extends Payload>[] payload() default {};
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/NoDuplicatesValidator.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/NoDuplicatesValidator.java
new file mode 100644
index 00000000..7ade1ab0
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/NoDuplicatesValidator.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.validation;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+import org.onap.sdc.workflow.api.types.Parameter;
+
+public class NoDuplicatesValidator implements ConstraintValidator<NoDuplicates, Collection<Parameter>> {
+
+    @Override
+    public boolean isValid(Collection<Parameter> parameters, ConstraintValidatorContext context) {
+        if (Objects.isNull(parameters) || parameters.size() < 2) {
+            return true;
+        }
+        Set<String> testSet = new HashSet<>();
+        return parameters.stream().allMatch(parameter -> testSet.add(parameter.getName()));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ValidName.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ValidName.java
new file mode 100644
index 00000000..2d90aeba
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ValidName.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Target({ElementType.TYPE, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Constraint(validatedBy = {ActivitySpecParameterNameValidator.class})
+public @interface ValidName {
+
+    String message() default "";
+
+    Class<?>[] groups() default {};
+
+    Class<? extends Payload>[] payload() default {};
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ValidStatus.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ValidStatus.java
new file mode 100644
index 00000000..15778b1d
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/validation/ValidStatus.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.api.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Target({ElementType.TYPE, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Constraint(validatedBy = {ArchivingStatusValidator.class})
+public @interface ValidStatus {
+
+  String message();
+
+  Class<?>[] groups() default {};
+
+  Class<? extends Payload>[] payload() default {};
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ActivitySpecRepository.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ActivitySpecRepository.java
new file mode 100644
index 00000000..f8f1d9a9
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ActivitySpecRepository.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence;
+
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+
+public interface ActivitySpecRepository {
+
+    void create(ActivitySpecEntity activitySpec);
+
+    ActivitySpecEntity get(ActivitySpecEntity activitySpec);
+
+    void update(ActivitySpecEntity activitySpec);
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ArtifactRepository.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ArtifactRepository.java
new file mode 100644
index 00000000..e10279fe
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ArtifactRepository.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence;
+
+
+import java.util.Optional;
+import org.onap.sdc.workflow.persistence.types.ArtifactEntity;
+
+
+public interface ArtifactRepository {
+
+    void update(String workflowId, String versionId,ArtifactEntity artifactEntity);
+
+    Optional<ArtifactEntity> get(String workflowId, String versionId);
+
+    boolean isExist(String workflowId, String versionId);
+
+    void createStructure(String workflowId, String versionId);
+
+    void delete(String workflowId, String versionId);
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ParameterRepository.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ParameterRepository.java
new file mode 100644
index 00000000..9f7fb1ad
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/ParameterRepository.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence;
+
+import java.util.Collection;
+import org.onap.sdc.workflow.persistence.types.ParameterEntity;
+import org.onap.sdc.workflow.persistence.types.ParameterRole;
+
+
+public interface ParameterRepository {
+
+    void createStructure(String id, String versionId);
+
+    Collection<ParameterEntity> list(String id, String versionId, ParameterRole role);
+
+    void deleteAll(String id, String versionId, ParameterRole role);
+
+    ParameterEntity get(String id, String versionId, String parameterId);
+
+    void delete(String id, String versionId, String parameterId);
+
+    ParameterEntity create(String id, String versionId , ParameterRole role, ParameterEntity parameter);
+
+    void update(String id, String versionId, ParameterRole role, ParameterEntity parameter);
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/UniqueValueRepository.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/UniqueValueRepository.java
new file mode 100644
index 00000000..cf7b0633
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/UniqueValueRepository.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence;
+
+import org.onap.sdc.workflow.persistence.types.UniqueValueEntity;
+import org.springframework.data.cassandra.repository.CassandraRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UniqueValueRepository extends CassandraRepository<UniqueValueEntity, UniqueValueEntity> {
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java
new file mode 100644
index 00000000..b304f900
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl;
+
+import static org.onap.sdc.common.zusammen.services.ZusammenElementUtil.buildStructuralElement;
+
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.Element;
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.ZusammenElement;
+import com.amdocs.zusammen.datatypes.item.Action;
+import com.amdocs.zusammen.datatypes.item.ElementContext;
+import com.amdocs.zusammen.datatypes.item.Info;
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.util.Objects;
+import java.util.Optional;
+import org.onap.sdc.common.versioning.persistence.zusammen.ZusammenSessionContextCreator;
+import org.onap.sdc.common.zusammen.services.ZusammenAdaptor;
+import org.onap.sdc.workflow.persistence.ActivitySpecRepository;
+import org.onap.sdc.workflow.persistence.impl.types.ActivitySpecData;
+import org.onap.sdc.workflow.persistence.impl.types.ActivitySpecElementType;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+import org.onap.sdc.workflow.services.ActivitySpecConstant;
+import org.onap.sdc.workflow.services.utilities.JsonUtil;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ActivitySpecRepositoryImpl implements ActivitySpecRepository {
+
+    private final ZusammenAdaptor zusammenAdaptor;
+    private final ZusammenSessionContextCreator contextCreator;
+
+    @Autowired
+    public ActivitySpecRepositoryImpl(ZusammenAdaptor zusammenAdaptor, ZusammenSessionContextCreator contextCreator) {
+        this.zusammenAdaptor = zusammenAdaptor;
+        this.contextCreator = contextCreator;
+    }
+
+    @Override
+    public void create(ActivitySpecEntity activitySpec) {
+        ZusammenElement generalElement = mapActivityDetailsToZusammenElement(activitySpec, Action.CREATE);
+
+        ElementContext elementContext = new ElementContext(activitySpec.getId(), activitySpec.getVersionId());
+        zusammenAdaptor
+                .saveElement(contextCreator.create(), elementContext, generalElement, "Create Activity Spec General Info Element");
+    }
+
+    @Override
+    public ActivitySpecEntity get(ActivitySpecEntity entity) {
+        ElementContext elementContext = new ElementContext(entity.getId(), entity.getVersionId());
+        Optional<Element> element =
+                zusammenAdaptor.getElementByName(contextCreator.create(), elementContext, null, ActivitySpecElementType.ACTIVITYSPEC.name());
+        return element.map(this::mapZusammenElementToActivityDetails).orElse(null);
+    }
+
+    @Override
+    public void update(ActivitySpecEntity entity) {
+        
+        ZusammenElement generalElement = mapActivityDetailsToZusammenElement(entity, Action.UPDATE);
+
+        ElementContext elementContext = new ElementContext(entity.getId(), entity.getVersionId());
+        zusammenAdaptor
+                .saveElement(contextCreator.create(), elementContext, generalElement, "Update Activity Spec General Info Element");
+    }
+
+    private ZusammenElement mapActivityDetailsToZusammenElement(ActivitySpecEntity entity, Action action) {
+        ZusammenElement generalElement = buildStructuralElement(ActivitySpecElementType.ACTIVITYSPEC.name(), action);
+
+        enrichElementInfoFromEntity(generalElement, entity);
+        enrichElementDataFromEntity(generalElement, entity);
+        return generalElement;
+    }
+
+    private void enrichElementInfoFromEntity(ZusammenElement element, ActivitySpecEntity entity) {
+        element.getInfo().addProperty(InfoPropertyName.DESCRIPTION.getValue(), entity.getDescription());
+        element.getInfo().addProperty(InfoPropertyName.NAME.getValue(), entity.getName());
+        element.getInfo().addProperty(InfoPropertyName.CATEGORY.getValue(), entity.getCategoryList());
+    }
+
+    private void enrichElementDataFromEntity(ZusammenElement element, ActivitySpecEntity entity) {
+        ActivitySpecData activitySpecData = new ActivitySpecData();
+        activitySpecData.setInputs(entity.getInputs());
+        activitySpecData.setOutputs(entity.getOutputs());
+        activitySpecData.setType(entity.getType());
+        activitySpecData.setContent(entity.getContent());
+        element.setData(new ByteArrayInputStream(JsonUtil.object2Json(activitySpecData).getBytes()));
+    }
+
+    private ActivitySpecEntity mapZusammenElementToActivityDetails(Element element) {
+        ActivitySpecEntity entity = new ActivitySpecEntity();
+        entity.setId(element.getElementId().getValue());
+        enrichEntityFromElementData(entity, element.getData());
+        enrichEntityFromElementInfo(entity, element.getInfo());
+        return entity;
+    }
+
+    private void enrichEntityFromElementData(ActivitySpecEntity entity, InputStream data) {
+        ActivitySpecData activitySpecData = JsonUtil.json2Object(data, ActivitySpecData.class);
+        if (Objects.nonNull(activitySpecData)) {
+            entity.setInputs(activitySpecData.getInputs());
+            entity.setOutputs(activitySpecData.getOutputs());
+            entity.setType(activitySpecData.getType());
+            entity.setContent(activitySpecData.getContent());
+        }
+    }
+
+    private void enrichEntityFromElementInfo(ActivitySpecEntity entity, Info info) {
+        entity.setName(info.getProperty(InfoPropertyName.NAME.getValue()));
+        entity.setDescription(info.getProperty(InfoPropertyName.DESCRIPTION.getValue()));
+        entity.setCategoryList(info.getProperty(InfoPropertyName.CATEGORY.getValue()));
+    }
+
+    public enum InfoPropertyName {
+        DESCRIPTION("description"), NAME("name"), CATEGORY(ActivitySpecConstant.CATEGORY_ATTRIBUTE_NAME);
+
+        private final String value;
+
+        InfoPropertyName(String value) {
+            this.value = value;
+        }
+
+        public String getValue() {
+            return value;
+        }
+    }
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ArtifactRepositoryImpl.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ArtifactRepositoryImpl.java
new file mode 100644
index 00000000..4ad54614
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ArtifactRepositoryImpl.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl;
+
+import static org.onap.sdc.common.zusammen.services.ZusammenElementUtil.buildStructuralElement;
+
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.Element;
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.ElementInfo;
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.ZusammenElement;
+import com.amdocs.zusammen.datatypes.item.Action;
+import com.amdocs.zusammen.datatypes.item.ElementContext;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Optional;
+import org.apache.commons.io.IOUtils;
+import org.onap.sdc.common.versioning.persistence.zusammen.ZusammenSessionContextCreator;
+import org.onap.sdc.common.zusammen.services.ZusammenAdaptor;
+import org.onap.sdc.workflow.persistence.ArtifactRepository;
+import org.onap.sdc.workflow.persistence.impl.types.WorkflowElementType;
+import org.onap.sdc.workflow.persistence.types.ArtifactEntity;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ArtifactRepositoryImpl implements ArtifactRepository {
+
+    private static final String FILE_NAME_PROPERTY = "fileName";
+    private static final String EMPTY_DATA = "{}";
+
+    private final ZusammenAdaptor zusammenAdaptor;
+    private final ZusammenSessionContextCreator contextCreator;
+
+    @Autowired
+    public ArtifactRepositoryImpl(ZusammenAdaptor zusammenAdaptor, ZusammenSessionContextCreator contextCreator) {
+        this.zusammenAdaptor = zusammenAdaptor;
+        this.contextCreator = contextCreator;
+    }
+
+    @Override
+    public void update(String workflowId, String versionId, ArtifactEntity artifactEntity) {
+
+        ZusammenElement artifactElement = buildStructuralElement(WorkflowElementType.ARTIFACT.name(), Action.UPDATE);
+        artifactElement.setData(artifactEntity.getArtifactData());
+        artifactElement.getInfo().addProperty(FILE_NAME_PROPERTY, artifactEntity.getFileName());
+
+
+        ElementContext elementContext = new ElementContext(workflowId, versionId);
+
+        zusammenAdaptor
+                .saveElement(contextCreator.create(), elementContext, artifactElement, "Update WorkflowVersion Artifact Element");
+    }
+
+    @Override
+    public Optional<ArtifactEntity> get(String workflowId, String versionId) {
+
+        ElementContext elementContext = new ElementContext(workflowId, versionId);
+
+        Optional<Element> elementOptional =
+                zusammenAdaptor.getElementByName(contextCreator.create(), elementContext, null, WorkflowElementType.ARTIFACT.name());
+
+        if (!elementOptional.isPresent() || hasEmptyData(elementOptional.get().getData())) {
+            return Optional.empty();
+        }
+
+        Element artifactElement = elementOptional.get();
+
+        ArtifactEntity artifact = new ArtifactEntity(artifactElement.getInfo().getProperty(FILE_NAME_PROPERTY),
+                artifactElement.getData());
+
+        return Optional.of(artifact);
+    }
+
+    @Override
+    public boolean isExist(String workflowId, String versionId) {
+
+        ElementContext elementContext = new ElementContext(workflowId, versionId);
+
+        Optional<ElementInfo> optionalElementInfo = zusammenAdaptor.getElementInfoByName(contextCreator.create(), elementContext, null,
+                WorkflowElementType.ARTIFACT.name());
+        return optionalElementInfo.isPresent() && optionalElementInfo.get().getInfo().getProperties()
+                                                                     .containsKey(FILE_NAME_PROPERTY);
+    }
+
+    @Override
+    public void createStructure(String workflowId, String versionId) {
+
+        ElementContext elementContext = new ElementContext(workflowId, versionId);
+
+        ZusammenElement artifactElement = buildStructuralElement(WorkflowElementType.ARTIFACT.name(), Action.CREATE);
+        artifactElement.setData(new ByteArrayInputStream(EMPTY_DATA.getBytes()));
+
+        zusammenAdaptor
+                .saveElement(contextCreator.create(), elementContext, artifactElement, "Create WorkflowVersion Artifact Element");
+
+    }
+
+    @Override
+    public void delete(String workflowId, String versionId) {
+
+        ElementContext elementContext = new ElementContext(workflowId, versionId);
+
+        ZusammenElement artifactElement = buildStructuralElement(WorkflowElementType.ARTIFACT.name(), Action.UPDATE);
+        artifactElement.setData(new ByteArrayInputStream(EMPTY_DATA.getBytes()));
+        artifactElement.getInfo().getProperties().remove(FILE_NAME_PROPERTY);
+
+        zusammenAdaptor.saveElement(contextCreator.create(), elementContext, artifactElement, "Delete WorkflowVersion Artifact Data");
+
+    }
+
+    private boolean hasEmptyData(InputStream elementData) {
+
+        byte[] byteElementData;
+        try {
+            byteElementData = IOUtils.toByteArray(elementData);
+        } catch (IOException ex) {
+            return false;
+        }
+        return Arrays.equals(EMPTY_DATA.getBytes(), byteElementData);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ParameterRepositoryImpl.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ParameterRepositoryImpl.java
new file mode 100644
index 00000000..eeef2477
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ParameterRepositoryImpl.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl;
+
+import static org.onap.sdc.common.zusammen.services.ZusammenElementUtil.ELEMENT_TYPE_PROPERTY;
+import static org.onap.sdc.common.zusammen.services.ZusammenElementUtil.buildElement;
+import static org.onap.sdc.common.zusammen.services.ZusammenElementUtil.buildStructuralElement;
+
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.Element;
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.ElementInfo;
+import com.amdocs.zusammen.adaptor.inbound.api.types.item.ZusammenElement;
+import com.amdocs.zusammen.datatypes.Id;
+import com.amdocs.zusammen.datatypes.item.Action;
+import com.amdocs.zusammen.datatypes.item.ElementContext;
+import com.amdocs.zusammen.datatypes.item.Info;
+import java.util.Collection;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import org.onap.sdc.common.versioning.persistence.zusammen.ZusammenSessionContextCreator;
+import org.onap.sdc.common.zusammen.services.ZusammenAdaptor;
+import org.onap.sdc.workflow.persistence.ParameterRepository;
+import org.onap.sdc.workflow.persistence.impl.types.ParameterPropertyName;
+import org.onap.sdc.workflow.persistence.impl.types.WorkflowElementType;
+import org.onap.sdc.workflow.persistence.types.ParameterEntity;
+import org.onap.sdc.workflow.persistence.types.ParameterRole;
+import org.onap.sdc.workflow.persistence.types.ParameterType;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ParameterRepositoryImpl implements ParameterRepository {
+
+    private final ZusammenAdaptor zusammenAdaptor;
+    private final ZusammenSessionContextCreator contextCreator;
+
+    @Autowired
+    public ParameterRepositoryImpl(ZusammenAdaptor zusammenAdaptor, ZusammenSessionContextCreator contextCreator) {
+        this.zusammenAdaptor = zusammenAdaptor;
+        this.contextCreator = contextCreator;
+    }
+
+    @Override
+    public void createStructure(String id, String versionId) {
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        ZusammenElement inputsElement = buildStructuralElement(WorkflowElementType.INPUTS.name(), Action.CREATE);
+        ZusammenElement outputsElement = buildStructuralElement(WorkflowElementType.OUTPUTS.name(), Action.CREATE);
+
+        zusammenAdaptor.saveElement(contextCreator.create(), elementContext, inputsElement, "Create WorkflowVersion INPUTS Element");
+        zusammenAdaptor.saveElement(contextCreator.create(), elementContext, outputsElement, "Create WorkflowVersion OUTPUTS Element");
+    }
+
+    @Override
+    public Collection<ParameterEntity> list(String id, String versionId, ParameterRole role) {
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        return zusammenAdaptor.listElementsByName(contextCreator.create(), elementContext, null, getParentElementType(role)).stream()
+                       .map(this::mapElementInfoToParameter).collect(Collectors.toList());
+    }
+
+    @Override
+    public void deleteAll(String id, String versionId, ParameterRole role) {
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        Optional<ElementInfo> optionalParentElement =
+                zusammenAdaptor.getElementInfoByName(contextCreator.create(), elementContext, null, getParentElementType(role));
+
+        if (!optionalParentElement.isPresent()) {
+            throw new IllegalStateException(
+                    String.format("Missing data for workflow id %s version id %s", id, versionId));
+        }
+        ZusammenElement parentElement = buildElement(optionalParentElement.get().getId(), Action.IGNORE);
+        parentElement.setSubElements(optionalParentElement.get().getSubElements().stream()
+                                             .map(parameter -> buildElement(parameter.getId(), Action.DELETE))
+                                             .collect(Collectors.toList()));
+
+        zusammenAdaptor.saveElement(contextCreator.create(), elementContext, parentElement, "Delete all " + role);
+    }
+
+    @Override
+    public ParameterEntity get(String id, String versionId, String parameterId) {
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        Optional<ElementInfo> element = zusammenAdaptor.getElementInfo(contextCreator.create(), elementContext, new Id(parameterId));
+
+        return element.map(this::mapElementInfoToParameter).orElse(null);
+    }
+
+    @Override
+    public void delete(String id, String versionId, String parameterId) {
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        ZusammenElement parameterElement = buildElement(new Id(parameterId), Action.DELETE);
+
+        zusammenAdaptor.saveElement(contextCreator.create(), elementContext, parameterElement,
+                String.format("Delete Parameter with id %s", parameterId));
+    }
+
+    @Override
+    public ParameterEntity create(String id, String versionId, ParameterRole role, ParameterEntity parameter) {
+        ZusammenElement parameterElement = parameterToZusammenElement(parameter, role, Action.CREATE);
+        ZusammenElement parentElement = buildStructuralElement(getParentElementType(role), Action.IGNORE);
+        parentElement.addSubElement(parameterElement);
+
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        Element savedElement = zusammenAdaptor.saveElement(contextCreator.create(), elementContext, parentElement,
+                "Create WorkflowVersion Parameter Element");
+
+        parameter.setId(savedElement.getSubElements().iterator().next().getElementId().getValue());
+        return parameter;
+    }
+
+    @Override
+    public void update(String id, String versionId, ParameterRole role, ParameterEntity parameter) {
+        ElementContext elementContext = new ElementContext(id, versionId);
+
+        ZusammenElement parameterElement = parameterToZusammenElement(parameter, role, Action.UPDATE);
+
+        zusammenAdaptor.saveElement(contextCreator.create(), elementContext, parameterElement, "Update WorkflowVersion Parameter");
+    }
+
+    private ZusammenElement parameterToZusammenElement(ParameterEntity parameter, ParameterRole role, Action action) {
+        ZusammenElement parameterElement =
+                buildElement(parameter.getId() == null ? null : new Id(parameter.getId()), action);
+        Info info = new Info();
+        info.setName(parameter.getName());
+        info.addProperty(ELEMENT_TYPE_PROPERTY, WorkflowElementType.valueOf(role.name()));
+        info.addProperty(ParameterPropertyName.TYPE.name(), parameter.getType());
+        info.addProperty(ParameterPropertyName.MANDATORY.name(), parameter.isMandatory());
+        parameterElement.setInfo(info);
+
+        return parameterElement;
+    }
+
+    private ParameterEntity mapElementInfoToParameter(ElementInfo elementInfo) {
+        ParameterEntity parameterEntity = new ParameterEntity();
+        parameterEntity.setId(elementInfo.getId().getValue());
+        parameterEntity.setName(elementInfo.getInfo().getName());
+        parameterEntity
+                .setType(ParameterType.valueOf(elementInfo.getInfo().getProperty(ParameterPropertyName.TYPE.name())));
+        parameterEntity.setMandatory(elementInfo.getInfo().getProperty(ParameterPropertyName.MANDATORY.name()));
+        return parameterEntity;
+    }
+
+    private static String getParentElementType(ParameterRole role) {
+        switch (role) {
+            case INPUT:
+                return WorkflowElementType.INPUTS.name();
+            case OUTPUT:
+                return WorkflowElementType.OUTPUTS.name();
+            default:
+                throw new IllegalArgumentException("Wrong Element Type");
+        }
+    }
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ActivitySpecData.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ActivitySpecData.java
new file mode 100644
index 00000000..5daba8d6
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ActivitySpecData.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl.types;
+
+import java.util.Collections;
+import java.util.List;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecParameter;
+
+@lombok.Data
+public class ActivitySpecData {
+
+    private List<ActivitySpecParameter> inputs = Collections.emptyList();
+    private List<ActivitySpecParameter> outputs = Collections.emptyList();
+    private String type;
+    private String content;
+}
+
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ActivitySpecElementType.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ActivitySpecElementType.java
new file mode 100644
index 00000000..e26b8088
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ActivitySpecElementType.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl.types;
+
+public enum ActivitySpecElementType {
+    ACTIVITYSPEC
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ParameterPropertyName.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ParameterPropertyName.java
new file mode 100644
index 00000000..300ddc49
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/ParameterPropertyName.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl.types;
+
+public enum ParameterPropertyName {
+    TYPE, MANDATORY
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/WorkflowElementType.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/WorkflowElementType.java
new file mode 100644
index 00000000..109ce97c
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/types/WorkflowElementType.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.impl.types;
+
+public enum WorkflowElementType {
+
+    ARTIFACT,
+    INPUTS,
+    OUTPUTS,
+    INPUT,
+    OUTPUT
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ActivitySpecEntity.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ActivitySpecEntity.java
new file mode 100644
index 00000000..cf3be394
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ActivitySpecEntity.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+import java.util.List;
+import lombok.NoArgsConstructor;
+
+@lombok.Data
+@NoArgsConstructor
+public class ActivitySpecEntity {
+
+    private String id;
+    private String versionId;
+    private String name;
+    private String description;
+
+    private List<String> categoryList;
+    private List<ActivitySpecParameter> inputs;
+    private List<ActivitySpecParameter> outputs;
+    private String type;
+    private String content;
+
+    //Not to be maintained in activityspec element
+    private String status;
+
+    public ActivitySpecEntity(String id, String versionId) {
+        this.id = id;
+        this.versionId = versionId;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ActivitySpecParameter.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ActivitySpecParameter.java
new file mode 100644
index 00000000..ec1c2681
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ActivitySpecParameter.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.onap.sdc.workflow.api.validation.ValidName;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@ValidName
+public class ActivitySpecParameter {
+
+    private String name;
+    private String type;
+    private String value;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ArtifactEntity.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ArtifactEntity.java
new file mode 100644
index 00000000..62819754
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ArtifactEntity.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+import java.io.InputStream;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class ArtifactEntity {
+
+    private String fileName;
+    private InputStream artifactData;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterEntity.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterEntity.java
new file mode 100644
index 00000000..4dfd1e4f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterEntity.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class ParameterEntity {
+
+    private String id;
+    private String name;
+    private ParameterType type;
+    private boolean mandatory;
+
+    public ParameterEntity(String name) {
+        this.name = name;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterRole.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterRole.java
new file mode 100644
index 00000000..9f5aacfe
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterRole.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+public enum ParameterRole {
+
+    INPUT,
+    OUTPUT
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterType.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterType.java
new file mode 100644
index 00000000..04d09c01
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/ParameterType.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+public enum ParameterType {
+    STRING,
+    INTEGER,
+    FLOAT,
+    BOOLEAN,
+    TIMESTAMP
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/UniqueValueEntity.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/UniqueValueEntity.java
new file mode 100644
index 00000000..faf515b7
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/types/UniqueValueEntity.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.persistence.types;
+
+import static org.springframework.data.cassandra.core.cql.PrimaryKeyType.PARTITIONED;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import org.springframework.data.cassandra.core.mapping.PrimaryKeyColumn;
+import org.springframework.data.cassandra.core.mapping.Table;
+
+@Table("unique_value")
+@Data
+@AllArgsConstructor
+public class UniqueValueEntity {
+
+    @PrimaryKeyColumn(ordinal = 0, type = PARTITIONED)
+    private String type;
+
+    @PrimaryKeyColumn(ordinal = 1, type = PARTITIONED)
+    private String value;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/ApplicationConfigurer.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/ApplicationConfigurer.java
new file mode 100644
index 00000000..a5cce460
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/ApplicationConfigurer.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ * Modifications copyright (c) 2019 Nokia
+ * ================================================================================
+ */
+
+package org.onap.sdc.workflow.server.config;
+
+import java.util.List;
+import org.onap.sdc.workflow.server.resolvers.UserIdResolver;
+import org.openecomp.sdc.logging.servlet.spring.LoggingInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class ApplicationConfigurer implements WebMvcConfigurer {
+
+    private final LoggingInterceptor loggingInterceptor;
+
+    @Autowired
+    public ApplicationConfigurer(LoggingInterceptor loggingInterceptor) {
+        this.loggingInterceptor = loggingInterceptor;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(loggingInterceptor);
+    }
+
+    @Override
+    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
+        argumentResolvers.add(new UserIdResolver());
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/LoggingInterceptorConfig.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/LoggingInterceptorConfig.java
new file mode 100644
index 00000000..53dbda59
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/LoggingInterceptorConfig.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.server.config;
+
+import org.openecomp.sdc.logging.servlet.HttpHeader;
+import org.openecomp.sdc.logging.servlet.spring.LoggingInterceptor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class LoggingInterceptorConfig {
+
+    @Value("${onap.logging.requestIdHeader}")
+    private String[] loggingRequestIdHeaders;
+
+    @Value("${onap.logging.partnerNameHeader}")
+    private String[] loggingPartnerNameHeader;
+
+    @Bean
+    public LoggingInterceptor createLoggingInterceptor() {
+        return new LoggingInterceptor(new HttpHeader(loggingRequestIdHeaders),
+                new HttpHeader(loggingPartnerNameHeader));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/SwaggerConfig.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/SwaggerConfig.java
new file mode 100644
index 00000000..a2eca63a
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/SwaggerConfig.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.server.config;
+
+import static springfox.documentation.builders.PathSelectors.regex;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import springfox.documentation.builders.RequestHandlerSelectors;
+import springfox.documentation.spi.DocumentationType;
+import springfox.documentation.spring.web.plugins.Docket;
+import springfox.documentation.swagger2.annotations.EnableSwagger2;
+
+@Configuration
+@EnableSwagger2
+public class SwaggerConfig {
+
+    @Bean
+    public Docket api() {
+        return new Docket(DocumentationType.SWAGGER_2)
+                       .select().apis(RequestHandlerSelectors.basePackage("org.onap.sdc.workflow.api"))
+                       .paths(regex("/(wf/workflows|v1.0/activity-spec).*"))
+                       .build();
+    }
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/WebServerConfig.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/WebServerConfig.java
new file mode 100644
index 00000000..e760ecd1
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/WebServerConfig.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.server.config;
+
+import org.eclipse.jetty.server.ServerConnector;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
+import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
+import org.springframework.boot.web.server.WebServerFactoryCustomizer;
+import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class WebServerConfig implements WebServerFactoryCustomizer<ConfigurableServletWebServerFactory> {
+
+    @Value("${http.port}")
+    private int httpPort;
+
+    @Override
+    public void customize(ConfigurableServletWebServerFactory container) {
+        if (container instanceof JettyServletWebServerFactory) {
+            JettyServletWebServerFactory containerFactory = (JettyServletWebServerFactory) container;
+            containerFactory.addServerCustomizers((JettyServerCustomizer) server -> {
+                ServerConnector connector = new ServerConnector(server);
+                connector.setPort(httpPort);
+                server.addConnector(connector);
+            });
+        }
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/WorkflowZusammenConfigProvider.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/WorkflowZusammenConfigProvider.java
new file mode 100644
index 00000000..dbd2d6de
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/config/WorkflowZusammenConfigProvider.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.server.config;
+
+import lombok.Getter;
+import org.onap.sdc.common.zusammen.config.ZusammenConfigProvider;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@Getter
+public class WorkflowZusammenConfigProvider implements ZusammenConfigProvider {
+
+    @Value("${spring.data.cassandra.keyspace-name}")
+    private String tenant;
+    @Value("${spring.data.cassandra.contact-points}")
+    private String cassandraAddresses;
+    @Value("${spring.data.cassandra.port}")
+    private String cassandraPort;
+
+    @Value("${spring.data.cassandra.username}")
+    private String cassandraUser;
+    @Value("${spring.data.cassandra.password}")
+    private String cassandraPassword;
+    @Value("${zusammen.cassandra.isAuthenticate}")
+    private String cassandraAuth;
+    @Value("${spring.data.cassandra.ssl}")
+
+    private String cassandraSSL;
+    @Value("${zusammen.cassandra.trustStorePath}")
+    private String cassandraTrustStorePath;
+    @Value("${zusammen.cassandra.trustStorePassword}")
+    private String cassandraTrustStorePassword;
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/filters/SessionContextFilter.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/filters/SessionContextFilter.java
new file mode 100644
index 00000000..57cda856
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/filters/SessionContextFilter.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.server.filters;
+
+import java.io.IOException;
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import org.onap.sdc.common.session.SessionContextProvider;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class SessionContextFilter implements Filter {
+
+    private final SessionContextProvider sessionContextProvider;
+    @Value("${spring.data.cassandra.keyspace-name}")
+    private String tenant;
+
+    @Autowired
+    public SessionContextFilter(SessionContextProvider sessionContextProvider) {
+        this.sessionContextProvider = sessionContextProvider;
+    }
+
+    @Override
+    public void init(FilterConfig filterConfig) {
+        // not implemented
+    }
+
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
+            throws IOException, ServletException {
+        try {
+            if (servletRequest instanceof HttpServletRequest) {
+                sessionContextProvider.create(getUser(servletRequest), tenant);
+            }
+
+            filterChain.doFilter(servletRequest, servletResponse);
+        } finally {
+            sessionContextProvider.close();
+        }
+    }
+
+    @Override
+    public void destroy() {
+        // not implemented
+    }
+
+    private String getUser(ServletRequest servletRequest) {
+        return "GLOBAL_USER";
+        // TODO: 7/11/2018 get user from header when collaboration will be supported
+        //((HttpServletRequest) servletRequest).getHeader(USER_ID_HEADER_PARAM);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/resolvers/UserIdResolver.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/resolvers/UserIdResolver.java
new file mode 100644
index 00000000..80cb07a8
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/server/resolvers/UserIdResolver.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.server.resolvers;
+
+import static org.onap.sdc.workflow.api.RestParams.USER_ID_HEADER;
+
+import java.util.Objects;
+import javax.servlet.http.HttpServletRequest;
+import org.onap.sdc.workflow.services.annotations.UserId;
+import org.springframework.core.MethodParameter;
+import org.springframework.web.bind.ServletRequestBindingException;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+/**
+ * Resolves a user ID from an HTTP header and injects it into a parameter of type {@link String} annotated with {@link
+ * UserId}. The header is considered mandatory, therefore an error is returned to the client if no user ID was sent.
+ *
+ * @author evitaliy
+ * @since 21 Aug 2018
+ */
+public class UserIdResolver implements HandlerMethodArgumentResolver {
+
+    private static final String ERROR_MESSAGE = "Missing mandatory request header '" + USER_ID_HEADER + "'";
+
+    @Override
+    public boolean supportsParameter(MethodParameter methodParameter) {
+
+        if (!methodParameter.hasParameterAnnotation(UserId.class)) {
+            return false;
+        }
+
+        Class<?> parameterType = methodParameter.getParameterType();
+        if (!parameterType.equals(String.class)) {
+            throw new IllegalStateException("Cannot inject user ID into a parameter of type "
+                                                    + parameterType.getTypeName());
+        }
+
+        return true;
+    }
+
+    @Override
+    public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer,
+            NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory)
+            throws ServletRequestBindingException {
+
+        HttpServletRequest httpServletRequest = nativeWebRequest.getNativeRequest(HttpServletRequest.class);
+        String userHeader = Objects.requireNonNull(httpServletRequest).getHeader(USER_ID_HEADER);
+        if (userHeader == null) {
+            throw new ServletRequestBindingException(ERROR_MESSAGE);
+        }
+
+        return userHeader;
+    }
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/ActivitySpecConstant.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/ActivitySpecConstant.java
new file mode 100644
index 00000000..bee916aa
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/ActivitySpecConstant.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services;
+
+public class ActivitySpecConstant {
+
+    public static final String CATEGORY_ATTRIBUTE_NAME = "category";
+    public static final String VERSION_ID_DEFAULT_VALUE = "latest";
+    public static final String ACTIVITY_SPEC_NOT_FOUND = "No Activity Spec found for the given identifiers";
+
+    private ActivitySpecConstant() {
+        //Utility Class declaring constants does not require instantiation.
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/ActivitySpecManager.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/ActivitySpecManager.java
new file mode 100644
index 00000000..b93a8dc8
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/ActivitySpecManager.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services;
+
+import java.util.Collection;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecAction;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+
+public interface ActivitySpecManager {
+
+    ActivitySpecEntity createActivitySpec(ActivitySpecEntity activitySpec);
+
+    ActivitySpecEntity get(ActivitySpecEntity activitySpec);
+
+    void update(ActivitySpecEntity activitySpec);
+
+    void actOnAction(ActivitySpecEntity activitySpec, ActivitySpecAction action);
+
+    Collection<ActivitySpecEntity> list(String versionStatus);
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/UniqueValueService.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/UniqueValueService.java
new file mode 100644
index 00000000..0a789829
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/UniqueValueService.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services;
+
+import java.util.Optional;
+import org.apache.commons.lang3.ArrayUtils;
+import org.onap.sdc.workflow.persistence.UniqueValueRepository;
+import org.onap.sdc.workflow.persistence.types.UniqueValueEntity;
+import org.onap.sdc.workflow.services.exceptions.UniqueValueViolationException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service("uniqueValueService")
+public class UniqueValueService {
+
+    private static final String FORMATTED_UNIQUE_VALUE_SEPARATOR = "_";
+
+    private final UniqueValueRepository uniqueValueRepository;
+
+    @Autowired
+    public UniqueValueService(UniqueValueRepository uniqueValueRepository) {
+        this.uniqueValueRepository = uniqueValueRepository;
+    }
+
+    /**
+     * Create unique value.
+     *
+     * @param type              the type
+     * @param uniqueCombination the unique combination
+     */
+    public void createUniqueValue(String type, String... uniqueCombination) {
+        formatValue(uniqueCombination).ifPresent(formattedValue -> {
+            validateUniqueValue(type, formattedValue, uniqueCombination);
+            uniqueValueRepository.insert(new UniqueValueEntity(type, formattedValue));
+        });
+    }
+
+    /**
+     * Delete unique value.
+     *
+     * @param type              the type
+     * @param uniqueCombination the unique combination
+     */
+    public void deleteUniqueValue(String type, String... uniqueCombination) {
+        formatValue(uniqueCombination)
+                .ifPresent(formattedValue -> uniqueValueRepository.delete(new UniqueValueEntity(type, formattedValue)));
+
+    }
+
+    /**
+     * Update unique value.
+     *
+     * @param type          the type
+     * @param oldValue      the old value
+     * @param newValue      the new value
+     * @param uniqueContext the unique context
+     */
+    public void updateUniqueValue(String type, String oldValue, String newValue, String... uniqueContext) {
+        if (newValue == null || !newValue.equalsIgnoreCase(oldValue)) {
+            createUniqueValue(type, ArrayUtils.addAll(uniqueContext, newValue));
+            deleteUniqueValue(type, ArrayUtils.addAll(uniqueContext, oldValue));
+        }
+    }
+
+    /**
+     * Validate unique value.
+     *
+     * @param type              the type
+     * @param uniqueCombination the unique combination
+     */
+    public void validateUniqueValue(String type, String... uniqueCombination) {
+        formatValue(uniqueCombination)
+                .ifPresent(formattedValue -> validateUniqueValue(type, formattedValue, uniqueCombination));
+    }
+
+    private Optional<String> formatValue(String[] uniqueCombination) {
+        if (ArrayUtils.isEmpty(uniqueCombination) || getValueWithoutContext(uniqueCombination) == null) {
+            return Optional.empty();
+        }
+
+        uniqueCombination[uniqueCombination.length - 1] = getValueWithoutContext(uniqueCombination).toLowerCase();
+        return Optional.of(String.join(FORMATTED_UNIQUE_VALUE_SEPARATOR, uniqueCombination));
+    }
+
+    private void validateUniqueValue(String type, String formattedValue, String[] uniqueCombination) {
+        if (isUniqueValueOccupied(type, formattedValue)) {
+            throw new UniqueValueViolationException(type, getValueWithoutContext(uniqueCombination));
+        }
+    }
+
+    private boolean isUniqueValueOccupied(String type, String formattedValue) {
+        return uniqueValueRepository.findById(new UniqueValueEntity(type, formattedValue)).isPresent();
+    }
+
+    /**
+     * Checks if a unique value is taken.
+     *
+     * @return true if the unique value is occupied, false otherwise
+     */
+    public boolean isUniqueValueOccupied(String type, String... uniqueCombination) {
+        return formatValue(uniqueCombination).map(formattedValue -> isUniqueValueOccupied(type, formattedValue))
+                                             .orElse(false);
+    }
+
+    private String getValueWithoutContext(String[] uniqueCombination) {
+        return uniqueCombination[uniqueCombination.length - 1];
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/WorkflowManager.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/WorkflowManager.java
new file mode 100644
index 00000000..2c7a7c24
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/WorkflowManager.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services;
+
+import java.util.Set;
+import org.onap.sdc.workflow.services.types.ArchivingStatus;
+import org.onap.sdc.workflow.services.types.Page;
+import org.onap.sdc.workflow.services.types.RequestSpec;
+import org.onap.sdc.workflow.services.types.Workflow;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+
+public interface WorkflowManager {
+
+    Page<Workflow> list(String statusFilter, String searchNameFilter, Set<WorkflowVersionState> versionStatesFilter, RequestSpec requestSpec);
+
+    Workflow get(Workflow workflow);
+
+    Workflow create(Workflow workflow);
+
+    void update(Workflow workflow);
+
+    void updateStatus(String workflowId, ArchivingStatus status);
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/WorkflowVersionManager.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/WorkflowVersionManager.java
new file mode 100644
index 00000000..a7f5c421
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/WorkflowVersionManager.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services;
+
+import java.util.Collection;
+import java.util.Set;
+import org.onap.sdc.workflow.persistence.types.ArtifactEntity;
+import org.onap.sdc.workflow.services.types.WorkflowVersion;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+import org.springframework.web.multipart.MultipartFile;
+
+
+public interface WorkflowVersionManager {
+
+    Collection<WorkflowVersion> list(String workflowId, Set<WorkflowVersionState> stateFilter);
+
+    WorkflowVersion create(String workflowId, String baseVersionId, WorkflowVersion version);
+
+    void update(String workflowId, WorkflowVersion version);
+
+    WorkflowVersion get(String workflowId, String versionId);
+
+    WorkflowVersionState getState(String workflowId, String versionId);
+
+    void updateState(String workflowId, String versionId, WorkflowVersionState state);
+
+    ArtifactEntity getArtifact(String workflowId, String versionId);
+
+    void deleteArtifact(String workflowId, String versionId);
+
+    void uploadArtifact(String workflowId, String versionId, MultipartFile artifact);
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/annotations/UserId.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/annotations/UserId.java
new file mode 100644
index 00000000..90a1a763
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/annotations/UserId.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.annotations;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({ElementType.PARAMETER})
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface UserId { }
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/EntityNotFoundException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/EntityNotFoundException.java
new file mode 100644
index 00000000..7fc3e81c
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/EntityNotFoundException.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+public class EntityNotFoundException extends RuntimeException  {
+
+    public EntityNotFoundException(String message) {
+        super(message);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/InvalidArtifactException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/InvalidArtifactException.java
new file mode 100644
index 00000000..c4584179
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/InvalidArtifactException.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+public class InvalidArtifactException extends RuntimeException  {
+
+    public InvalidArtifactException(String message) {
+        super("Invalid artifact file can not be processed. Error: " + message);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/UniqueValueViolationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/UniqueValueViolationException.java
new file mode 100644
index 00000000..a3046a77
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/UniqueValueViolationException.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+
+public class UniqueValueViolationException extends RuntimeException {
+
+    private static final String UNIQUE_VALUE_VIOLATION_MSG = "%s with the value '%s' already exists.";
+
+    public UniqueValueViolationException(String uniqueType, String value) {
+        super(String.format(UNIQUE_VALUE_VIOLATION_MSG, uniqueType, value));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionCreationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionCreationException.java
new file mode 100644
index 00000000..31c88923
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionCreationException.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+public class VersionCreationException extends RuntimeException {
+
+    private static final String MSG = "Error creating a new version for workflow with id %s";
+    private static final String MSG_WITH_BASE_ID = MSG + " based on version %s: %s";
+
+    public VersionCreationException(String workflowId, String baseVersionId, String detailedMessage) {
+        super(String.format(MSG_WITH_BASE_ID, workflowId, baseVersionId, detailedMessage));
+    }
+
+    public VersionCreationException(String workflowId) {
+        super(String.format(MSG, workflowId));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionModificationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionModificationException.java
new file mode 100644
index 00000000..752d6bce
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionModificationException.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+public class VersionModificationException extends RuntimeException {
+
+    public VersionModificationException(String workflowId, String versionId) {
+        super(String.format(
+            "Error while trying to modify version %s of workflow %s: Version is CERTIFIED and can not be edited",
+            versionId, workflowId));
+    }
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStateModificationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStateModificationException.java
new file mode 100644
index 00000000..43360bd6
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStateModificationException.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+
+public class VersionStateModificationException extends RuntimeException {
+
+    public VersionStateModificationException(String workflowId, String versionId, WorkflowVersionState sourceState,
+                                             WorkflowVersionState targetState) {
+        this(workflowId, versionId, sourceState, targetState, null);
+    }
+
+    public VersionStateModificationException(String workflowId, String versionId, WorkflowVersionState sourceState,
+                                             WorkflowVersionState targetState, Exception submitException) {
+        super(String.format("Workflow %s, version %s: state can not be changed from %s to %s", workflowId, versionId,
+                sourceState.name(), targetState.name()), submitException);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStateModificationMissingArtifactException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStateModificationMissingArtifactException.java
new file mode 100644
index 00000000..abda1caf
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStateModificationMissingArtifactException.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+
+public class VersionStateModificationMissingArtifactException extends RuntimeException {
+
+    public static final String WORKFLOW_MODIFICATION_STATE_MISSING_ARTIFACT_TEMPLATE =
+            "Workflow %s, version %s: state can not be changed from %s to %s. Missing artifact";
+
+    public VersionStateModificationMissingArtifactException(String workflowId, String versionId,
+                                                            WorkflowVersionState sourceState,
+                                                            WorkflowVersionState targetState) {
+        super(String.format(WORKFLOW_MODIFICATION_STATE_MISSING_ARTIFACT_TEMPLATE, workflowId, versionId,
+                sourceState.name(), targetState.name()));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStatusModificationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStatusModificationException.java
new file mode 100644
index 00000000..917a8384
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionStatusModificationException.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+import org.onap.sdc.common.versioning.services.types.VersionStatus;
+
+public class VersionStatusModificationException extends RuntimeException {
+
+    public VersionStatusModificationException(String activitySpecId, String versionId, VersionStatus sourceState,
+            VersionStatus targetState) {
+        super(String.format("Activity spec %s, version %s: status can not be changed from %s to %s", activitySpecId,
+                versionId, sourceState.name(), targetState.name()));
+    }
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionValidationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionValidationException.java
new file mode 100644
index 00000000..815bc0b2
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/VersionValidationException.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+public class VersionValidationException extends RuntimeException {
+
+    private static final String MSG = "Error creating or modifying version for workflow with id %s: %s";
+
+    public VersionValidationException(String workflowId, String detailedMessage) {
+        super(String.format(MSG, workflowId, detailedMessage));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/WorkflowModificationException.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/WorkflowModificationException.java
new file mode 100644
index 00000000..7aa5ac0b
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/exceptions/WorkflowModificationException.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.exceptions;
+
+public class WorkflowModificationException extends RuntimeException {
+
+    public WorkflowModificationException(String workflowId) {
+      super(String.format(
+        "Error while trying to modify workflow %s: Workflow is ARCHIVED and can not be edited", workflowId));
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/ActivitySpecManagerImpl.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/ActivitySpecManagerImpl.java
new file mode 100644
index 00000000..e1849b9f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/ActivitySpecManagerImpl.java
@@ -0,0 +1,231 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl;
+
+import static org.onap.sdc.common.versioning.services.types.VersionStatus.Certified;
+import static org.onap.sdc.common.versioning.services.types.VersionStatus.Deleted;
+import static org.onap.sdc.common.versioning.services.types.VersionStatus.Deprecated;
+import static org.onap.sdc.common.versioning.services.types.VersionStatus.Draft;
+import static org.onap.sdc.workflow.services.ActivitySpecConstant.ACTIVITY_SPEC_NOT_FOUND;
+import static org.onap.sdc.workflow.services.ActivitySpecConstant.VERSION_ID_DEFAULT_VALUE;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import org.onap.sdc.common.versioning.services.ItemManager;
+import org.onap.sdc.common.versioning.services.VersioningManager;
+import org.onap.sdc.common.versioning.services.types.Item;
+import org.onap.sdc.common.versioning.services.types.Version;
+import org.onap.sdc.common.versioning.services.types.VersionCreationMethod;
+import org.onap.sdc.common.versioning.services.types.VersionStatus;
+import org.onap.sdc.workflow.api.types.activityspec.ActivitySpecAction;
+import org.onap.sdc.workflow.persistence.ActivitySpecRepository;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+import org.onap.sdc.workflow.services.ActivitySpecManager;
+import org.onap.sdc.workflow.services.UniqueValueService;
+import org.onap.sdc.workflow.services.exceptions.EntityNotFoundException;
+import org.onap.sdc.workflow.services.exceptions.VersionStatusModificationException;
+import org.onap.sdc.workflow.services.impl.mappers.ActivitySpecMapper;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Service;
+
+@Service("activitySpecManager")
+public class ActivitySpecManagerImpl implements ActivitySpecManager {
+
+    private static final String ACTIVITY_SPEC_NAME = "ActivitySpec.Name";
+    private static final Logger LOGGER = LoggerFactory.getLogger(ActivitySpecManagerImpl.class);
+    private static final Map<VersionStatus, VersionStatus> EXPECTED_PREV_STATUS;
+
+    static {
+        EXPECTED_PREV_STATUS = new EnumMap<>(VersionStatus.class);
+        EXPECTED_PREV_STATUS.put(Certified, Draft);
+        EXPECTED_PREV_STATUS.put(Deprecated, Certified);
+        EXPECTED_PREV_STATUS.put(Deleted, Deprecated);
+    }
+
+    private final ItemManager itemManager;
+    private final VersioningManager versioningManager;
+    private final ActivitySpecRepository activitySpecDao;
+    private final UniqueValueService uniqueValueService;
+    private final ActivitySpecMapper activitySpecMapper;
+
+
+    @Autowired
+    public ActivitySpecManagerImpl(ItemManager itemManager, VersioningManager versioningManager,
+            ActivitySpecRepository activitySpecDao,
+            @Qualifier("uniqueValueService") UniqueValueService uniqueValueService,
+            ActivitySpecMapper activitySpecMapper) {
+        this.itemManager = itemManager;
+        this.versioningManager = versioningManager;
+        this.activitySpecDao = activitySpecDao;
+        this.uniqueValueService = uniqueValueService;
+        this.activitySpecMapper = activitySpecMapper;
+    }
+
+    @Override
+    public ActivitySpecEntity createActivitySpec(ActivitySpecEntity activitySpec) {
+
+        uniqueValueService.validateUniqueValue(ACTIVITY_SPEC_NAME, activitySpec.getName());
+
+        Item item = new Item();
+        activitySpecMapper.toItem(activitySpec, item);
+        Item createdItem = itemManager.create(item);
+
+        Version createdVersion =
+                versioningManager.create(createdItem.getId(), null, new Version(), VersionCreationMethod.major);
+
+        activitySpec.setId(createdItem.getId());
+        activitySpec.setVersionId(createdVersion.getId());
+        activitySpecDao.create(activitySpec);
+
+        uniqueValueService.createUniqueValue(ACTIVITY_SPEC_NAME, activitySpec.getName());
+        return activitySpec;
+    }
+
+    @Override
+    public ActivitySpecEntity get(ActivitySpecEntity activitySpec) {
+        activitySpec.setVersionId(calculateLatestVersion(activitySpec));
+        ActivitySpecEntity retrieved;
+        try {
+
+            retrieved = activitySpecDao.get(activitySpec);
+        } catch (RuntimeException e) {
+            LOGGER.error("Failed to retrieve activity spec for activitySpecId: {} and version: {}",
+                    activitySpec.getId(), activitySpec.getVersionId(), e);
+            throw new EntityNotFoundException(ACTIVITY_SPEC_NOT_FOUND);
+        }
+        if (retrieved != null) {
+            final Version retrievedVersion = versioningManager.get(activitySpec.getId(), activitySpec.getVersionId());
+            retrieved.setStatus(Objects.nonNull(retrievedVersion) ? retrievedVersion.getStatus().name() : null);
+        }
+        return retrieved;
+    }
+
+    @Override
+    public void update(ActivitySpecEntity activitySpec) {
+        Item item = itemManager.get(activitySpec.getId());
+        if (item == null) {
+            LOGGER.error("Activity Spec with id {} was not found", activitySpec.getId());
+            throw new EntityNotFoundException(ACTIVITY_SPEC_NOT_FOUND);
+        }
+        uniqueValueService.updateUniqueValue(ACTIVITY_SPEC_NAME, item.getName(), activitySpec.getName());
+
+        activitySpecMapper.toItem(activitySpec, item);
+        itemManager.update(activitySpec.getId(), item);
+
+        activitySpec.setVersionId(calculateLatestVersion(activitySpec));
+        activitySpecDao.update(activitySpec);
+    }
+
+    @Override
+    public void actOnAction(ActivitySpecEntity activitySpec, ActivitySpecAction action) {
+        VersionStatus newStatus = getVersionStatusByAction(action);
+
+        String versionId = calculateLatestVersion(activitySpec);
+        Version retrievedVersion;
+        try {
+            retrievedVersion = versioningManager.get(activitySpec.getId(), versionId);
+        } catch (RuntimeException e) {
+            LOGGER.error("failed to get activity {}, version {}", activitySpec.getId(), versionId, e);
+            throw new EntityNotFoundException(ACTIVITY_SPEC_NOT_FOUND);
+        }
+        if (retrievedVersion == null) {
+            throw new EntityNotFoundException(ACTIVITY_SPEC_NOT_FOUND);
+        }
+
+        VersionStatus retrievedStatus = retrievedVersion.getStatus();
+        VersionStatus expectedPrevStatus = EXPECTED_PREV_STATUS.get(newStatus);
+        if (expectedPrevStatus != null && retrievedStatus != expectedPrevStatus) {
+            LOGGER.debug("Failed to {} since activity spec is in status {}", action.name(), retrievedStatus);
+            throw new VersionStatusModificationException(activitySpec.getId(), versionId, retrievedStatus,
+                    newStatus);
+        }
+
+        versioningManager.updateStatus(activitySpec.getId(), retrievedVersion.getId(), newStatus,
+                "actionOnActivitySpec :" + action.name());
+
+        if (action == ActivitySpecAction.DELETE) {
+            final String activitySpecName = get(new ActivitySpecEntity(activitySpec.getId(), versionId)).getName();
+            uniqueValueService.deleteUniqueValue(ACTIVITY_SPEC_NAME, activitySpecName);
+        }
+    }
+
+    private VersionStatus getVersionStatusByAction(ActivitySpecAction action) {
+        switch (action) {
+            case DELETE:
+                return Deleted;
+            case DEPRECATE:
+                return Deprecated;
+            case CERTIFY:
+                return Certified;
+            default:
+                throw new UnsupportedOperationException(
+                        String.format("Activity Spec action %s is not supported", action.name()));
+        }
+
+    }
+
+    @Override
+    public Collection<ActivitySpecEntity> list(String versionStatus) {
+        Predicate<Item> itemPredicate;
+        if (Objects.nonNull(versionStatus)) {
+            VersionStatus statusEnumValue;
+
+            try {
+                statusEnumValue = VersionStatus.valueOf(versionStatus);
+            } catch (IllegalArgumentException e) {
+                LOGGER.debug("Unexpected value of VersionStatus {}", versionStatus);
+                return Collections.emptyList();
+            }
+            itemPredicate =
+                    item -> ItemType.ACTIVITYSPEC.name().equals(item.getType()) && item.getVersionStatusCounters()
+                                                                                           .containsKey(
+                                                                                                   statusEnumValue);
+        } else {
+            itemPredicate = item -> ItemType.ACTIVITYSPEC.name().equals(item.getType());
+        }
+
+        return itemManager.list(itemPredicate).stream()
+                       .sorted(Comparator.comparing(Item::getModificationTime).reversed())
+                       .map(activitySpecMapper::itemToActivitySpec).collect(Collectors.toList());
+    }
+
+    private String calculateLatestVersion(ActivitySpecEntity activitySpec) {
+        if (VERSION_ID_DEFAULT_VALUE.equalsIgnoreCase(activitySpec.getVersionId())) {
+            List<Version> versions;
+            try {
+                versions = versioningManager.list(activitySpec.getId());
+            } catch (RuntimeException e) {
+                LOGGER.error("Failed to list versions for activitySpecId {}", activitySpec.getId(), e);
+                throw new EntityNotFoundException(ACTIVITY_SPEC_NOT_FOUND);
+            }
+            if (Objects.nonNull(versions) && !versions.isEmpty()) {
+                return versions.get(0).getId();
+            }
+        }
+        return activitySpec.getVersionId();
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/ItemType.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/ItemType.java
new file mode 100644
index 00000000..8a05d88d
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/ItemType.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl;
+
+public enum ItemType {
+    WORKFLOW, ACTIVITYSPEC
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/WorkflowManagerImpl.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/WorkflowManagerImpl.java
new file mode 100644
index 00000000..fc135621
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/WorkflowManagerImpl.java
@@ -0,0 +1,217 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl;
+
+import static org.onap.sdc.workflow.services.impl.ItemType.WORKFLOW;
+import static org.onap.sdc.workflow.services.types.PagingConstants.DEFAULT_LIMIT;
+import static org.onap.sdc.workflow.services.types.PagingConstants.DEFAULT_OFFSET;
+import static org.onap.sdc.workflow.services.types.PagingConstants.MAX_LIMIT;
+
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import org.onap.sdc.common.versioning.services.ItemManager;
+import org.onap.sdc.common.versioning.services.types.Item;
+import org.onap.sdc.common.versioning.services.types.ItemStatus;
+import org.onap.sdc.common.versioning.services.types.VersionStatus;
+import org.onap.sdc.workflow.services.UniqueValueService;
+import org.onap.sdc.workflow.services.WorkflowManager;
+import org.onap.sdc.workflow.services.exceptions.EntityNotFoundException;
+import org.onap.sdc.workflow.services.exceptions.WorkflowModificationException;
+import org.onap.sdc.workflow.services.impl.mappers.ArchivingStatusMapper;
+import org.onap.sdc.workflow.services.impl.mappers.VersionStateMapper;
+import org.onap.sdc.workflow.services.impl.mappers.WorkflowMapper;
+import org.onap.sdc.workflow.services.types.ArchivingStatus;
+import org.onap.sdc.workflow.services.types.Page;
+import org.onap.sdc.workflow.services.types.PagingRequest;
+import org.onap.sdc.workflow.services.types.RequestSpec;
+import org.onap.sdc.workflow.services.types.Sort;
+import org.onap.sdc.workflow.services.types.SortingRequest;
+import org.onap.sdc.workflow.services.types.Workflow;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Service;
+
+@Service("workflowManager")
+public class WorkflowManagerImpl implements WorkflowManager {
+
+    private static final String WORKFLOW_NOT_FOUND_ERROR_MSG = "Workflow with id '%s' does not exist";
+    private static final String WORKFLOW_NAME_UNIQUE_TYPE = "WORKFLOW_NAME";
+    private static final Predicate<Item> WORKFLOW_ITEM_TYPE_FILTER = item -> WORKFLOW.name().equals(item.getType());
+    private static final String WORKSPACES_SORT_PROPERTY = "name";
+    private static final RequestSpec WORKSPACES_DEFAULT_REQUEST_SPEC =
+            new RequestSpec(new PagingRequest(DEFAULT_OFFSET, DEFAULT_LIMIT),
+                    SortingRequest.builder().sort(new Sort(WORKSPACES_SORT_PROPERTY, true)).build());
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(WorkflowManagerImpl.class);
+
+    private final ItemManager itemManager;
+    private final UniqueValueService uniqueValueService;
+    private final WorkflowMapper workflowMapper;
+    private final ArchivingStatusMapper archivingStatusMapper;
+    private final VersionStateMapper versionStateMapper;
+
+    @Autowired
+    public WorkflowManagerImpl(ItemManager itemManager,
+            @Qualifier("uniqueValueService") UniqueValueService uniqueValueService, WorkflowMapper workflowMapper,
+            ArchivingStatusMapper archivingStatusMapper, VersionStateMapper versionStateMapper) {
+        this.itemManager = itemManager;
+        this.uniqueValueService = uniqueValueService;
+        this.workflowMapper = workflowMapper;
+        this.archivingStatusMapper = archivingStatusMapper;
+        this.versionStateMapper = versionStateMapper;
+    }
+
+    @Override
+    public Page<Workflow> list(String statusFilter, String searchNameFilter,
+            Set<WorkflowVersionState> versionStatesFilter, RequestSpec requestSpec) {
+        requestSpec = getRequestSpec(requestSpec);
+
+        Collection<Item> workflowItems =
+                itemManager.list(createFilter(statusFilter, searchNameFilter, versionStatesFilter));
+
+        List<Workflow> workflowsSlice = workflowItems.stream().map(workflowMapper::fromItem)
+                                                .sorted(getWorkflowComparator(requestSpec.getSorting()))
+                                                .skip(requestSpec.getPaging().getOffset())
+                                                .limit(requestSpec.getPaging().getLimit()).collect(Collectors.toList());
+
+        return new Page<>(workflowsSlice, requestSpec.getPaging(), workflowItems.size());
+    }
+
+    @Override
+    public Workflow get(Workflow workflow) {
+        Item retrievedItem = itemManager.get(workflow.getId());
+        if (retrievedItem == null) {
+            throw new EntityNotFoundException(String.format(WORKFLOW_NOT_FOUND_ERROR_MSG, workflow.getId()));
+        }
+        return this.workflowMapper.fromItem(retrievedItem);
+    }
+
+    @Override
+    public Workflow create(Workflow workflow) {
+        Item item = new Item();
+        workflowMapper.toItem(workflow, item);
+
+        uniqueValueService.validateUniqueValue(WORKFLOW_NAME_UNIQUE_TYPE, workflow.getName());
+        Item createdItem = itemManager.create(item);
+        uniqueValueService.createUniqueValue(WORKFLOW_NAME_UNIQUE_TYPE, workflow.getName());
+
+        return workflowMapper.fromItem(createdItem);
+    }
+
+    @Override
+    public void update(Workflow workflow) {
+        Item item = itemManager.get(workflow.getId());
+        if (item == null) {
+            throw new EntityNotFoundException(String.format(WORKFLOW_NOT_FOUND_ERROR_MSG, workflow.getId()));
+        }
+
+        if (ItemStatus.ARCHIVED.equals(item.getStatus())) {
+            throw new WorkflowModificationException(workflow.getId());
+        }
+
+        uniqueValueService.updateUniqueValue(WORKFLOW_NAME_UNIQUE_TYPE, item.getName(), workflow.getName());
+
+        workflowMapper.toItem(workflow, item);
+        itemManager.update(workflow.getId(), item);
+    }
+
+    @Override
+    public void updateStatus(String workflowId, ArchivingStatus status) {
+        itemManager.updateStatus(workflowId, archivingStatusMapper.toItemStatus(status));
+    }
+
+    private static RequestSpec getRequestSpec(RequestSpec requestSpec) {
+        if (requestSpec == null) {
+            return WORKSPACES_DEFAULT_REQUEST_SPEC;
+        }
+        if (requestSpec.getPaging() == null) {
+            requestSpec.setPaging(WORKSPACES_DEFAULT_REQUEST_SPEC.getPaging());
+        } else {
+            handlePagingRequestValues(requestSpec.getPaging());
+        }
+        if (requestSpec.getSorting() == null) {
+            requestSpec.setSorting(WORKSPACES_DEFAULT_REQUEST_SPEC.getSorting());
+        }
+        return requestSpec;
+    }
+
+    private static void handlePagingRequestValues(PagingRequest paging) {
+        if (paging.getOffset() == null) {
+            paging.setOffset(DEFAULT_OFFSET);
+        }
+        if (paging.getLimit() == null) {
+            paging.setLimit(DEFAULT_LIMIT);
+        } else if (paging.getLimit() > MAX_LIMIT) {
+            paging.setLimit(MAX_LIMIT);
+        }
+    }
+
+    private static Comparator<Workflow> getWorkflowComparator(SortingRequest sorting) {
+        Boolean byNameAscending = sorting.getSorts().stream()
+                                          .filter(sort -> WORKSPACES_SORT_PROPERTY.equalsIgnoreCase(sort.getProperty()))
+                                          .findFirst().map(Sort::isAscendingOrder).orElse(true);
+        Comparator<Workflow> byName = Comparator.comparing(Workflow::getName);
+
+        return byNameAscending ? byName : byName.reversed();
+    }
+
+    private Predicate<Item> createFilter(String itemStatusFilter, String searchNameFilter,
+            Set<WorkflowVersionState> versionStatesFilter) {
+
+        Set<VersionStatus> versionStatusesFilter = versionStatesFilter == null ? null :
+                                                           versionStatesFilter.stream()
+                                                           .map(versionStateMapper::workflowVersionStateToVersionStatus)
+                                                           .collect(Collectors.toSet());
+
+        Predicate<Item> filter = addSearchNameFilter(WORKFLOW_ITEM_TYPE_FILTER, searchNameFilter);
+
+        filter = addVersionStatusFilter(filter, versionStatusesFilter);
+
+        return addItemStatusFilter(filter, itemStatusFilter);
+
+    }
+
+    private static Predicate<Item> addSearchNameFilter(Predicate<Item> filter, String searchNameFilter) {
+        return filter.and(item -> searchNameFilter == null || item.getName().toLowerCase()
+                                                                      .contains(searchNameFilter.toLowerCase()));
+    }
+
+    private static Predicate<Item> addVersionStatusFilter(Predicate<Item> filter, Set<VersionStatus> versionStatuses) {
+        return filter.and(item -> versionStatuses == null || item.getVersionStatusCounters().keySet().stream()
+                                                                     .anyMatch(versionStatuses::contains));
+    }
+
+    private static Predicate<Item> addItemStatusFilter(Predicate<Item> filter, String itemStatusFilter) {
+        if (itemStatusFilter != null) {
+            try {
+                ItemStatus.valueOf(itemStatusFilter.toUpperCase());
+            } catch (IllegalArgumentException e) {
+                LOGGER.debug("Illegal Workflow status filter: {}. Ignoring filter", itemStatusFilter, e);
+                return filter;
+            }
+            return filter.and(item -> item.getStatus().equals(ItemStatus.valueOf(itemStatusFilter.toUpperCase())));
+        }
+        return filter;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/WorkflowVersionManagerImpl.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/WorkflowVersionManagerImpl.java
new file mode 100644
index 00000000..f95e6a1f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/WorkflowVersionManagerImpl.java
@@ -0,0 +1,308 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl;
+
+import static org.onap.sdc.workflow.services.types.WorkflowVersionState.CERTIFIED;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import org.onap.sdc.common.versioning.services.ItemManager;
+import org.onap.sdc.common.versioning.services.VersioningManager;
+import org.onap.sdc.common.versioning.services.types.Item;
+import org.onap.sdc.common.versioning.services.types.ItemStatus;
+import org.onap.sdc.common.versioning.services.types.Version;
+import org.onap.sdc.common.versioning.services.types.VersionCreationMethod;
+import org.onap.sdc.common.versioning.services.types.VersionStatus;
+import org.onap.sdc.workflow.persistence.ArtifactRepository;
+import org.onap.sdc.workflow.persistence.ParameterRepository;
+import org.onap.sdc.workflow.persistence.types.ArtifactEntity;
+import org.onap.sdc.workflow.persistence.types.ParameterEntity;
+import org.onap.sdc.workflow.persistence.types.ParameterRole;
+import org.onap.sdc.workflow.services.WorkflowVersionManager;
+import org.onap.sdc.workflow.services.exceptions.EntityNotFoundException;
+import org.onap.sdc.workflow.services.exceptions.InvalidArtifactException;
+import org.onap.sdc.workflow.services.exceptions.VersionCreationException;
+import org.onap.sdc.workflow.services.exceptions.VersionModificationException;
+import org.onap.sdc.workflow.services.exceptions.VersionStateModificationException;
+import org.onap.sdc.workflow.services.exceptions.VersionStateModificationMissingArtifactException;
+import org.onap.sdc.workflow.services.exceptions.WorkflowModificationException;
+import org.onap.sdc.workflow.services.impl.mappers.VersionMapper;
+import org.onap.sdc.workflow.services.impl.mappers.VersionStateMapper;
+import org.onap.sdc.workflow.services.types.WorkflowVersion;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+import org.openecomp.sdc.logging.api.Logger;
+import org.openecomp.sdc.logging.api.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+import org.springframework.web.multipart.MultipartFile;
+
+@Service("workflowVersionManager")
+public class WorkflowVersionManagerImpl implements WorkflowVersionManager {
+
+    private static final String VERSION_NOT_EXIST_MSG = "version with id '%s' does not exist for workflow with id '%s'";
+    private final VersioningManager versioningManager;
+    private final ItemManager itemManager;
+    private final ArtifactRepository artifactRepository;
+    private final ParameterRepository parameterRepository;
+    private final VersionMapper versionMapper;
+    private final VersionStateMapper versionStateMapper;
+    private static final Logger LOGGER = LoggerFactory.getLogger(WorkflowVersionManagerImpl.class);
+
+    @Autowired
+    public WorkflowVersionManagerImpl(VersioningManager versioningManager, ArtifactRepository artifactRepository,
+            VersionMapper versionMapper, VersionStateMapper versionStateMapper, ItemManager itemManager,
+            ParameterRepository parameterRepository) {
+        this.itemManager = itemManager;
+        this.versioningManager = versioningManager;
+        this.artifactRepository = artifactRepository;
+        this.parameterRepository = parameterRepository;
+        this.versionMapper = versionMapper;
+        this.versionStateMapper = versionStateMapper;
+    }
+
+    @Override
+    public Collection<WorkflowVersion> list(String workflowId, Set<WorkflowVersionState> stateFilter) {
+        Set<VersionStatus> versionStatusFilter =
+                stateFilter == null ? null :
+                        stateFilter.stream().map(versionStateMapper::workflowVersionStateToVersionStatus)
+                                           .collect(Collectors.toSet());
+
+        return versioningManager.list(workflowId).stream()
+                                .filter(version -> versionStatusFilter == null || versionStatusFilter.contains(
+                                        version.getStatus()))
+                                .map(versionMapper::fromVersion)
+                                .sorted(Comparator.comparing(WorkflowVersion::getName).reversed())
+                                .peek(workflowVersion -> loadAndAddParameters(workflowId, workflowVersion))
+                                .collect(Collectors.toList());
+    }
+
+    @Override
+    public WorkflowVersion get(String workflowId, String versionId) {
+        WorkflowVersion workflowVersion = versionMapper.fromVersion(getVersion(workflowId, versionId));
+        loadAndAddParameters(workflowId, workflowVersion);
+        workflowVersion.setHasArtifact(artifactRepository.isExist(workflowId,versionId));
+        return workflowVersion;
+    }
+
+    @Override
+    public WorkflowVersion create(String workflowId, String baseVersionId, WorkflowVersion workflowVersion) {
+        validateWorkflowStatus(workflowId);
+        List<Version> versions = versioningManager.list(workflowId);
+
+        if (baseVersionId != null) {
+            if (!workflowVersion.getInputs().isEmpty() || !workflowVersion.getOutputs().isEmpty()) {
+                throw new VersionCreationException(workflowId, baseVersionId, "Inputs/Outputs should not be supplied");
+            }
+            validateVersionExistAndCertified(workflowId, versions, baseVersionId);
+        } else if (!versions.isEmpty()) {
+            throw new VersionCreationException(workflowId);
+        }
+
+        Version version = new Version();
+        version.setDescription(workflowVersion.getDescription());
+        Version createdVersion = versioningManager.create(workflowId, baseVersionId, version, VersionCreationMethod.major);
+
+        if (versions.isEmpty()) { // only for first versionId
+            artifactRepository.createStructure(workflowId, createdVersion.getId());
+            parameterRepository.createStructure(workflowId, createdVersion.getId());
+            updateParameters(workflowId, createdVersion.getId(), workflowVersion.getInputs(), workflowVersion.getOutputs());
+            versioningManager.publish(workflowId, createdVersion.getId(), "Add initial data");
+        }
+
+        return get(workflowId, createdVersion.getId());
+    }
+
+    @Override
+    public void update(String workflowId, WorkflowVersion workflowVersion) {
+        validateWorkflowStatus(workflowId);
+        Version version = getVersion(workflowId, workflowVersion.getId());
+        if (CERTIFIED.equals(versionStateMapper.versionStatusToWorkflowVersionState(version.getStatus()))) {
+            throw new VersionModificationException(workflowId, workflowVersion.getId());
+        }
+
+        versionMapper.toVersion(workflowVersion, version);
+
+        updateParameters(workflowId, version.getId(), workflowVersion.getInputs(), workflowVersion.getOutputs());
+
+        versioningManager.update(workflowId, version.getId(), version);
+
+        Version updatedVersion = versioningManager.get(workflowId, version.getId());
+        if (updatedVersion.getState().isDirty()) {
+            versioningManager.publish(workflowId, version.getId(), "Update version");
+        }
+    }
+
+
+    @Override
+    public WorkflowVersionState getState(String workflowId, String versionId) {
+        return versionStateMapper.versionStatusToWorkflowVersionState(getVersion(workflowId, versionId).getStatus());
+    }
+
+    @Override
+    public void updateState(String workflowId, String versionId, WorkflowVersionState newState) {
+        WorkflowVersionState currentState = getState(workflowId, versionId);
+        if (newState == CERTIFIED) {
+            if(!artifactRepository.isExist(workflowId,versionId)){
+                throw new VersionStateModificationMissingArtifactException(workflowId, versionId, currentState,
+                        newState);
+            }
+            try {
+                versioningManager.updateStatus(workflowId, versionId, VersionStatus.Certified,
+                        String.format("Update version state to %s", newState.name()));
+            } catch (Exception submitException) {
+                throw new VersionStateModificationException(workflowId, versionId, currentState, newState,
+                        submitException);
+            }
+        } else {
+            throw new VersionStateModificationException(workflowId, versionId, currentState, newState);
+        }
+    }
+
+    @Override
+    public void uploadArtifact(String workflowId, String versionId, MultipartFile artifact) {
+        validateWorkflowStatus(workflowId);
+        Version retrievedVersion = getVersion(workflowId, versionId);
+        if (CERTIFIED.equals(versionStateMapper.versionStatusToWorkflowVersionState(retrievedVersion.getStatus()))) {
+            throw new VersionModificationException(workflowId, versionId);
+        }
+
+        try (InputStream artifactData = artifact.getInputStream()) {
+            ArtifactEntity artifactEntity =
+                    new ArtifactEntity(StringUtils.cleanPath(artifact.getOriginalFilename()), artifactData);
+            artifactRepository.update(workflowId, versionId, artifactEntity);
+            Version updatedVersion = versioningManager.get(workflowId, versionId);
+            if(updatedVersion.getState().isDirty()) {
+                versioningManager.publish(workflowId, updatedVersion.getId(), "Update artifact");
+            }
+
+        } catch (IOException e) {
+            LOGGER.error(String.format("Upload Artifact failed for workflow id %s and version id %s",
+                    workflowId, versionId),e);
+            throw new InvalidArtifactException(e.getMessage());
+        }
+    }
+
+    @Override
+    public ArtifactEntity getArtifact(String workflowId, String versionId) {
+        getVersion(workflowId, versionId);
+        Optional<ArtifactEntity> artifactOptional = artifactRepository.get(workflowId, versionId);
+        if (!artifactOptional.isPresent()) {
+            LOGGER.error("Workflow Version Artifact was not found for workflow id {} and version id {}",
+                    workflowId, versionId);
+            throw new EntityNotFoundException(
+                    String.format("Artifact for workflow id %s version id %s was not found", workflowId, versionId));
+        }
+        return artifactOptional.get();
+    }
+
+    @Override
+    public void deleteArtifact(String workflowId, String versionId) {
+        validateWorkflowStatus(workflowId);
+        WorkflowVersion retrievedVersion = get(workflowId, versionId);
+        if (CERTIFIED.equals(retrievedVersion.getState())) {
+            LOGGER.error("Workflow Version is certified and can not be edited.Workflow id {} and version id {}",
+                    workflowId, versionId);
+            throw new VersionModificationException(workflowId, versionId);
+        }
+        if(retrievedVersion.isHasArtifact()) {
+            artifactRepository.delete(workflowId, versionId);
+            versioningManager.publish(workflowId, versionId, "Delete Artifact");
+        }
+    }
+
+    private void validateVersionExistAndCertified(String workflowId, List<Version> versions, String versionId) {
+        Version baseVersion = findVersion(versions, versionId).orElseThrow(
+                () -> new EntityNotFoundException(String.format(VERSION_NOT_EXIST_MSG, versionId, workflowId)));
+
+        if (CERTIFIED != versionStateMapper.versionStatusToWorkflowVersionState(baseVersion.getStatus())) {
+            throw new VersionCreationException(workflowId, versionId, "base version must be CERTIFIED");
+        }
+    }
+
+    private Version getVersion(String workflowId, String versionId) {
+        try {
+            Version version = versioningManager.get(workflowId, versionId);
+            if (version == null) {
+                throw new EntityNotFoundException(String.format(VERSION_NOT_EXIST_MSG, versionId, workflowId));
+            }
+            return version;
+        } catch (Exception e) {
+            LOGGER.error(String.format(
+                    "Workflow Version was not found.Workflow id %s and version id %s", workflowId,
+                    versionId),e);
+            throw new EntityNotFoundException(String.format(VERSION_NOT_EXIST_MSG, versionId, workflowId));
+        }
+    }
+
+    private void updateParameters(String workflowId, String versionId, Collection<ParameterEntity> inputs,
+            Collection<ParameterEntity> outputs) {
+        updateVersionParameters(workflowId, versionId, ParameterRole.INPUT, inputs);
+        updateVersionParameters(workflowId, versionId, ParameterRole.OUTPUT, outputs);
+    }
+
+    private void updateVersionParameters(String workflowId, String versionId, ParameterRole role,
+            Collection<ParameterEntity> parameters) {
+
+        Collection<ParameterEntity> retrievedParams = parameterRepository.list(workflowId, versionId, role);
+        Map<String, ParameterEntity> retrievedParamsByName =
+                retrievedParams.stream().collect(Collectors.toMap(ParameterEntity::getName, Function.identity()));
+
+        Set<String> namesOfParamsToKeep = new HashSet<>();
+        for (ParameterEntity parameter : parameters) {
+
+            ParameterEntity retrievedParam = retrievedParamsByName.get(parameter.getName());
+            if (retrievedParam == null) {
+                parameterRepository.create(workflowId, versionId, role, parameter);
+            } else {
+                parameter.setId(retrievedParam.getId());
+                parameterRepository.update(workflowId, versionId, role, parameter);
+                namesOfParamsToKeep.add(parameter.getName());
+            }
+        }
+
+        retrievedParams.stream().filter(retrievedParam -> !namesOfParamsToKeep.contains(retrievedParam.getName()))
+                       .forEach(retrievedParam -> parameterRepository
+                                                          .delete(workflowId, versionId, retrievedParam.getId()));
+    }
+
+    private void loadAndAddParameters(String workflowId, WorkflowVersion workflowVersion) {
+        workflowVersion.setInputs(parameterRepository.list(workflowId, workflowVersion.getId(), ParameterRole.INPUT));
+        workflowVersion.setOutputs(parameterRepository.list(workflowId, workflowVersion.getId(), ParameterRole.OUTPUT));
+    }
+
+    private static Optional<Version> findVersion(List<Version> versions, String versionId) {
+        return versions.stream().filter(version -> versionId.equals(version.getId())).findFirst();
+    }
+
+    void validateWorkflowStatus(String workflowId) {
+        Item workflowItem = itemManager.get(workflowId);
+        if (ItemStatus.ARCHIVED.equals(workflowItem.getStatus())) {
+            throw new WorkflowModificationException(workflowId);
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/ActivitySpecMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/ActivitySpecMapper.java
new file mode 100644
index 00000000..09e96c3e
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/ActivitySpecMapper.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl.mappers;
+
+import static org.onap.sdc.workflow.services.ActivitySpecConstant.CATEGORY_ATTRIBUTE_NAME;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.onap.sdc.common.versioning.services.types.Item;
+import org.onap.sdc.common.versioning.services.types.VersionStatus;
+import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
+import org.onap.sdc.workflow.services.ActivitySpecConstant;
+import org.onap.sdc.workflow.services.impl.ItemType;
+
+@Mapper(componentModel = "spring", imports = {ItemType.class, ActivitySpecConstant.class})
+public interface ActivitySpecMapper {
+
+    @Mapping(source = "versionStatusCounters", target = "status")
+    @Mapping(source = "properties", target = "categoryList")
+    ActivitySpecEntity itemToActivitySpec(Item item);
+
+    @InheritInverseConfiguration
+    @Mapping(expression = "java(ItemType.ACTIVITYSPEC.name())", target = "type")
+    @Mapping(target = "versionStatusCounters", ignore = true)
+    @Mapping(target = "status", ignore = true)
+    @Mapping(source = "categoryList", target = "properties")
+    void toItem(ActivitySpecEntity activitySpec, @MappingTarget Item retrievedItem);
+
+    default String versionStatusCountersToStatus(Map<VersionStatus, Integer> versionStatusCounters) {
+        return versionStatusCounters.keySet().stream().findFirst().map(Enum::name).orElse(null);
+    }
+
+    default Map<String, Object> categoriesToProperties(List<String> categories) {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(CATEGORY_ATTRIBUTE_NAME, categories);
+        return properties;
+    }
+
+    default List<String> propertiesToCategories(Map<String, Object> properties) {
+        return (List<String>) properties.get(CATEGORY_ATTRIBUTE_NAME);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/ArchivingStatusMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/ArchivingStatusMapper.java
new file mode 100644
index 00000000..702815f6
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/ArchivingStatusMapper.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl.mappers;
+
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.ValueMapping;
+import org.onap.sdc.common.versioning.services.types.ItemStatus;
+import org.onap.sdc.workflow.services.types.ArchivingStatus;
+
+@Mapper(componentModel = "spring")
+public interface ArchivingStatusMapper {
+
+    @ValueMapping(source = "ACTIVE", target = "ACTIVE")
+    @ValueMapping(source = "ARCHIVED", target = "ARCHIVED")
+    @ValueMapping(source = "<ANY_REMAINING>", target = "ACTIVE")
+    ArchivingStatus fromItemStatus(ItemStatus status);
+
+    @InheritInverseConfiguration
+    ItemStatus toItemStatus(ArchivingStatus status);
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/VersionMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/VersionMapper.java
new file mode 100644
index 00000000..145c79fe
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/VersionMapper.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl.mappers;
+
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.onap.sdc.common.versioning.services.convertors.VersionConvertor;
+import org.onap.sdc.common.versioning.services.types.Version;
+import org.onap.sdc.workflow.services.impl.ItemType;
+import org.onap.sdc.workflow.services.types.WorkflowVersion;
+
+@Mapper(componentModel = "spring", uses = VersionStateMapper.class)
+public interface VersionMapper extends VersionConvertor<WorkflowVersion> {
+
+    @Override
+    default String getItemType(){
+        return ItemType.WORKFLOW.name();
+    }
+
+    @Override
+    @Mapping(source = "status", target = "state")
+    WorkflowVersion fromVersion(Version version);
+
+    @Override
+    @InheritInverseConfiguration
+    @Mapping(target = "status", ignore = true)
+    void toVersion(WorkflowVersion workflowVersion, @MappingTarget Version retrievedVersion);
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/VersionStateMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/VersionStateMapper.java
new file mode 100644
index 00000000..05772f4f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/VersionStateMapper.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl.mappers;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.ValueMapping;
+import org.onap.sdc.common.versioning.services.types.VersionStatus;
+import org.onap.sdc.workflow.services.types.WorkflowVersionState;
+
+@Mapper(componentModel = "spring")
+public interface VersionStateMapper {
+
+    @ValueMapping(source = "Certified", target = "CERTIFIED")
+    @ValueMapping(source = "Draft", target = "DRAFT")
+    @ValueMapping(source = "<ANY_REMAINING>", target = "DRAFT")
+    WorkflowVersionState versionStatusToWorkflowVersionState(VersionStatus status);
+
+    @InheritInverseConfiguration
+    VersionStatus workflowVersionStateToVersionStatus(WorkflowVersionState status);
+
+    default Set<WorkflowVersionState> versionStatusCountersToWorkflowVersionStates(
+            Map<VersionStatus, Integer> versionStatusCounters) {
+        return versionStatusCounters.keySet().stream().map(this::versionStatusToWorkflowVersionState)
+                       .collect(Collectors.toSet());
+    }
+
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/WorkflowMapper.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/WorkflowMapper.java
new file mode 100644
index 00000000..214d2ac6
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/impl/mappers/WorkflowMapper.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.impl.mappers;
+
+import org.mapstruct.InheritInverseConfiguration;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.MappingTarget;
+import org.onap.sdc.common.versioning.services.convertors.ItemConvertor;
+import org.onap.sdc.common.versioning.services.types.Item;
+import org.onap.sdc.workflow.services.impl.ItemType;
+import org.onap.sdc.workflow.services.types.Workflow;
+
+@Mapper(componentModel = "spring", imports = ItemType.class,
+        uses = {VersionStateMapper.class, ArchivingStatusMapper.class})
+public interface WorkflowMapper extends ItemConvertor<Workflow> {
+
+    @Override
+    default String getItemType() {
+        return ItemType.WORKFLOW.name();
+    }
+
+    @Override
+    @Mapping(source = "versionStatusCounters", target = "versionStates")
+    @Mapping(source = "status", target = "archiving")
+    Workflow fromItem(Item item);
+
+    @Override
+    @InheritInverseConfiguration
+    @Mapping(target = "status", ignore = true)
+    @Mapping(target = "versionStatusCounters", ignore = true)
+    @Mapping(expression = "java(ItemType.WORKFLOW.name())", target = "type")
+    void toItem(Workflow workflow, @MappingTarget Item item);
+
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/ArchivingStatus.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/ArchivingStatus.java
new file mode 100644
index 00000000..2e7eb22b
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/ArchivingStatus.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+public enum ArchivingStatus {
+  ARCHIVED,
+  ACTIVE
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Page.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Page.java
new file mode 100644
index 00000000..3fc9d0ba
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Page.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import java.util.List;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class Page<T> {
+
+    private Paging paging;
+    private List<T> items;
+
+    public Page(List<T> items, PagingRequest pagingRequest, int total) {
+        this.items = items;
+        this.paging = new Paging(pagingRequest, items.size(), total);
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Paging.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Paging.java
new file mode 100644
index 00000000..2c4124fa
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Paging.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import lombok.Getter;
+
+@Getter
+public class Paging {
+
+    private int offset;
+    private int limit;
+    private int count;
+    private boolean hasMore;
+    private int total;
+
+    public Paging(PagingRequest pagingRequest, int count, int total) {
+        this.offset = pagingRequest.getOffset();
+        this.limit = pagingRequest.getLimit();
+        this.count = count;
+        setTotal(total);
+    }
+
+    private void setTotal(int total) {
+        this.total = total;
+        this.hasMore = total > offset + limit;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/PagingConstants.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/PagingConstants.java
new file mode 100644
index 00000000..214e7ea2
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/PagingConstants.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+public class PagingConstants {
+
+    public static final int DEFAULT_OFFSET = 0;
+    public static final int DEFAULT_LIMIT = 200;
+    public static final int MAX_LIMIT = 2000;
+
+    private PagingConstants() {
+        throw new IllegalStateException("Constants class");
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/PagingRequest.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/PagingRequest.java
new file mode 100644
index 00000000..6408ee69
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/PagingRequest.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import lombok.Getter;
+
+@Getter
+public class PagingRequest {
+
+    private Integer offset;
+    private Integer limit;
+
+    public PagingRequest(int offset, int limit) {
+        setOffset(offset);
+        setLimit(limit);
+    }
+
+    public void setOffset(int offset) {
+        this.offset = offset < 0 ? null : offset;
+    }
+
+    public void setLimit(int limit) {
+        this.limit = limit <= 0 ? null : limit;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/RequestSpec.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/RequestSpec.java
new file mode 100644
index 00000000..06ebdf1c
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/RequestSpec.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class RequestSpec {
+
+    private PagingRequest paging;
+    private SortingRequest sorting;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Sort.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Sort.java
new file mode 100644
index 00000000..b26ef1cb
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Sort.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+
+@Getter
+@EqualsAndHashCode
+@AllArgsConstructor
+public class Sort {
+
+    private String property;
+    private boolean ascendingOrder;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/SortingRequest.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/SortingRequest.java
new file mode 100644
index 00000000..cd8b2c27
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/SortingRequest.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import java.util.List;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Singular;
+
+@Builder
+@Getter
+public class SortingRequest {
+
+    @Singular
+    private List<Sort> sorts;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Workflow.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Workflow.java
new file mode 100644
index 00000000..fcac779f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/Workflow.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+
+import static org.onap.sdc.workflow.services.types.WorkflowValidationConstants.MAX_LENGTH;
+import static org.onap.sdc.workflow.services.types.WorkflowValidationConstants.MIN_LENGTH;
+
+import java.util.Collection;
+import java.util.Set;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Pattern;
+import javax.validation.constraints.Size;
+import lombok.Data;
+
+
+@Data
+public class Workflow {
+
+    private String id;
+    @NotBlank(message = "Workflow name may not be blank.")
+    @Size(min = MIN_LENGTH, max = MAX_LENGTH,
+            message = "Workflow name must be at least " + MIN_LENGTH + " characters, and no more than " + MAX_LENGTH
+                              + " characters.")
+    @Pattern(regexp = "[A-Za-z0-9_. -]+", message = "Workflow name must contain only letters, digits and underscores.")
+    private String name;
+    private String description;
+    private Set<WorkflowVersionState> versionStates;
+    private Collection<WorkflowVersion> versions;
+    private ArchivingStatus archiving;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowValidationConstants.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowValidationConstants.java
new file mode 100644
index 00000000..2d54c7b8
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowValidationConstants.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright © 2016-2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+public class WorkflowValidationConstants {
+
+    public static final int MAX_LENGTH = 80;
+    public static final int MIN_LENGTH = 6;
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowVersion.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowVersion.java
new file mode 100644
index 00000000..0699157f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowVersion.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Date;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.onap.sdc.workflow.persistence.types.ParameterEntity;
+
+
+@Data
+@NoArgsConstructor
+public class WorkflowVersion {
+
+    private String id;
+    private String name;
+    private String description;
+    private String baseId;
+    private WorkflowVersionState state;
+    private Collection<ParameterEntity> inputs = Collections.emptyList();
+    private Collection<ParameterEntity> outputs = Collections.emptyList();
+    private boolean hasArtifact;
+    private Date creationTime;
+    private Date modificationTime;
+
+    public WorkflowVersion(String id) {
+        this.id = id;
+        this.state = WorkflowVersionState.DRAFT;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowVersionState.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowVersionState.java
new file mode 100644
index 00000000..cccdd5c7
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/types/WorkflowVersionState.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.types;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public enum WorkflowVersionState {
+
+    CERTIFIED, DRAFT(CERTIFIED);
+
+    private final List<WorkflowVersionState> nextStates;
+
+    WorkflowVersionState(WorkflowVersionState... nextStates) {
+        this.nextStates = Collections.unmodifiableList(Arrays.asList(nextStates));
+    }
+
+    public List<WorkflowVersionState> getNextStates() {
+        return nextStates;
+    }
+}
diff --git a/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/utilities/JsonUtil.java b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/utilities/JsonUtil.java
new file mode 100644
index 00000000..3e197a9f
--- /dev/null
+++ b/sdc-workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/utilities/JsonUtil.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.sdc.workflow.services.utilities;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonIOException;
+import com.google.gson.JsonSyntaxException;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.StringReader;
+
+public class JsonUtil {
+
+    private static final Gson gson = new Gson();
+
+    private JsonUtil() {
+    }
+
+    /**
+     * Object 2 json string.
+     *
+     * @param obj the obj
+     * @return the string
+     */
+    public static String object2Json(Object obj) {
+        return sbObject2Json(obj).toString();
+
+    }
+
+    /**
+     * Sb object 2 json string builder.
+     *
+     * @param obj the obj
+     * @return the string builder
+     */
+    public static StringBuilder sbObject2Json(Object obj) {
+        return new StringBuilder(new GsonBuilder().setPrettyPrinting().create().toJson(obj));
+    }
+
+    /**
+     * Json 2 object t.
+     *
+     * @param <T>      the type parameter
+     * @param json     the json
+     * @param classOfT the class of t
+     * @return the t
+     */
+    public static <T> T json2Object(String json, Class<T> classOfT) {
+        T typ;
+        try {
+            try (Reader br = new StringReader(json)) {
+                typ = gson.fromJson(br, classOfT);
+            }
+        } catch (JsonIOException | JsonSyntaxException | IOException exception) {
+            throw new RuntimeException(exception);
+        }
+        return typ;
+    }
+
+    /**
+     * Json 2 object t.
+     *
+     * @param <T>      the type parameter
+     * @param is       the is
+     * @param classOfT the class of t
+     * @return the t
+     */
+    public static <T> T json2Object(InputStream is, Class<T> classOfT) {
+        T type;
+        try (Reader br = new BufferedReader(new InputStreamReader(is))) {
+            type = new Gson().fromJson(br, classOfT);
+        } catch (JsonIOException | JsonSyntaxException | IOException exception) {
+            throw new RuntimeException(exception);
+        }
+        return type;
+    }
+
+}