POMBA: SDNC Context Builder

Initial code for POMBA: SDNC Context Builder

Issue-ID: LOG-520
Change-Id: I6b06561b9050acc83b0c2b18b21c94f0f13f63e4
Signed-off-by: Tait,Trevor(rt0435) <rtait@amdocs.com>

12 files changed, 724 insertions, 0 deletions

diff --git a/src/main/java/META-INF/MANIFEST.MF b/src/main/java/META-INF/MANIFEST.MF
new file mode 100644
index 0000000..254272e
--- /dev/null
+++ b/src/main/java/META-INF/MANIFEST.MF
@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Class-Path: 
+
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java
new file mode 100644
index 0000000..e0ebfc8
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java
@@ -0,0 +1,53 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc;
+
+import org.apache.velocity.app.VelocityEngine;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.web.support.SpringBootServletInitializer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@SpringBootApplication
+@ComponentScan(basePackages = "org.onap.pomba.contextbuilder.sdnc")
+@EnableAsync
+@EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class })
+public class Application extends SpringBootServletInitializer {
+    @Override
+    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+        return application.sources(Application.class);
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Bean
+    public VelocityEngine velocityEngine() {
+        VelocityEngine velocityEngine =  new VelocityEngine();
+        velocityEngine.init();
+        return velocityEngine;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/JerseyConfiguration.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/JerseyConfiguration.java
new file mode 100644
index 0000000..3f73644
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/JerseyConfiguration.java
@@ -0,0 +1,71 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc;
+
+import java.util.logging.Logger;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+
+import org.glassfish.jersey.client.ClientConfig;
+import org.glassfish.jersey.logging.LoggingFeature;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.glassfish.jersey.servlet.ServletProperties;
+import org.onap.pomba.contextbuilder.sdnc.service.rs.RestServiceImpl;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.MapperFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+
+@Component
+@ApplicationPath("/")
+public class JerseyConfiguration extends ResourceConfig {
+    private static final Logger log = Logger.getLogger(JerseyConfiguration.class.getName());
+
+    @Bean
+    @Primary
+    public ObjectMapper objectMapper() {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
+        objectMapper.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES);
+        objectMapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
+        return objectMapper;
+    }
+
+    @Autowired
+    public JerseyConfiguration() {
+        register(RestServiceImpl.class);
+        property(ServletProperties.FILTER_FORWARD_ON_404, true);
+        register(new LoggingFeature(log));
+    }
+
+    @Bean
+    public Client jerseyClient() {
+        return ClientBuilder.newClient(
+                new ClientConfig());
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java
new file mode 100644
index 0000000..ec5c8b3
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java
@@ -0,0 +1,74 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc;
+
+import java.util.Base64;
+import javax.ws.rs.ApplicationPath;
+import org.eclipse.jetty.util.security.Password;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.stereotype.Component;
+
+
+@Component
+@ApplicationPath("/")
+public class SdncConfiguration {
+
+    @Value("${sdnc.serviceName}")
+    private String serviceName;
+
+    @Value("${sdnc.servicePort}")
+    private String servicePort;
+
+    @Value("${sdnc.httpProtocol}")
+    private String httpProtocol;
+
+    @Value("${sdnc.user}")
+    private String user;
+
+    @Value("${sdnc.password}")
+    private String password;
+
+    @Value("${sdnc.connectionTimeout}")
+    private Integer connectionTimeout;
+
+    @Value("${sdnc.readTimeout}")
+    private Integer readTimeout;
+
+    @Value("${sdnc.genericResourcePath}")
+    private String genericResourcePath;
+
+    @Bean(name="sdncBaseUrl")
+    public String getURL() {
+        return httpProtocol + "://" + serviceName + ":" + servicePort;
+    }
+
+    @Bean(name="sdncGenericResourcePath")
+    public String getgenericResourcePath() {
+        return genericResourcePath;
+    }
+
+    @Bean(name = "sdncBasicAuthorization")
+    public String getSdncBasicAuth() {
+        String auth = this.user + ":"+ Password.deobfuscate(this.password);
+        return ("Basic " + Base64.getEncoder().encodeToString(auth.getBytes()));
+    }
+
+
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncCtxbConfiguration.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncCtxbConfiguration.java
new file mode 100644
index 0000000..7268d4b
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncCtxbConfiguration.java
@@ -0,0 +1,41 @@
+/*

+ * ============LICENSE_START===================================================

+ * Copyright (c) 2018 Amdocs

+ * ============================================================================

+ * 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=====================================================

+ */

+

+package org.onap.pomba.contextbuilder.sdnc;

+

+import java.util.Base64;

+import org.eclipse.jetty.util.security.Password;

+import org.springframework.beans.factory.annotation.Value;

+import org.springframework.context.annotation.Bean;

+import org.springframework.stereotype.Component;

+

+@Component

+public class SdncCtxbConfiguration {

+    @Value("${sdncCtxBuilder.userId:admin}")

+    private String sdncCtxBuilderUserId;

+

+    @Value("${sdncCtxBuilder.password:OBF:1u2a1toa1w8v1tok1u30}")

+    private String sdncCtxBuilderPassword;

+

+    @Bean(name = "sdncCtxBuilderBasicAuthorization")

+    public String getSdncBasicAuth() {

+        String auth = this.sdncCtxBuilderUserId + ":"

+                + Password.deobfuscate(this.sdncCtxBuilderPassword);

+        return ("Basic " + Base64.getEncoder().encodeToString(auth.getBytes()));

+    }

+}

diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/WebConfiguration.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/WebConfiguration.java
new file mode 100644
index 0000000..c49ff24
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/WebConfiguration.java
@@ -0,0 +1,45 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+
+@Configuration
+public class WebConfiguration {
+
+    @Bean
+    public WebMvcConfigurerAdapter forwardToIndex() {
+        return new WebMvcConfigurerAdapter() {
+            @Override
+            public void addViewControllers(ViewControllerRegistry registry) {
+                registry.addViewController("/swagger").setViewName(
+                        "redirect:/swagger/index.html");
+                registry.addViewController("/swagger/").setViewName(
+                        "redirect:/swagger/index.html");
+                registry.addViewController("/docs").setViewName(
+                        "redirect:/docs/html/index.html");
+                registry.addViewController("/docs/").setViewName(
+                         "redirect:/docs/html/index.html");
+            }
+        };
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/exception/AuditException.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/exception/AuditException.java
new file mode 100644
index 0000000..63137a1
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/exception/AuditException.java
@@ -0,0 +1,46 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.exception;
+
+import javax.ws.rs.core.Response.Status;
+
+public class AuditException extends Exception {
+
+  private static final long serialVersionUID = 8162385108397238865L;
+
+  private Status httpStatus;
+
+
+  public AuditException(String message) {
+    super(message);
+  }
+
+  public AuditException(String message, Status httpStatus) {
+    super(message);
+    this.setHttpStatus(httpStatus);
+  }
+
+  public Status getHttpStatus() {
+    return httpStatus;
+  }
+
+  public void setHttpStatus(Status httpStatus) {
+    this.httpStatus = httpStatus;
+  }
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringService.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringService.java
new file mode 100644
index 0000000..6ead761
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringService.java
@@ -0,0 +1,28 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.service;
+
+
+import org.onap.pomba.common.datatypes.ModelContext;
+import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
+
+public interface SpringService {
+    public ModelContext getContext(String serviceInstanceId, String transactionId) throws AuditException;
+    public String getSdncAuthoriztion();
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java
new file mode 100644
index 0000000..daf6bf8
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java
@@ -0,0 +1,74 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.service;
+
+import javax.ws.rs.client.Client;
+import org.onap.pomba.common.datatypes.ModelContext;
+import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
+import org.onap.pomba.contextbuilder.sdnc.service.rs.RestService;
+import org.onap.pomba.contextbuilder.sdnc.util.RestUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class SpringServiceImpl implements SpringService {
+    private static Logger log = LoggerFactory.getLogger(RestService.class);
+
+    @Autowired
+    private Client jerseyClient;
+    @Autowired
+    private String sdncBaseUrl;
+    @Autowired
+    private String sdncBasicAuthorization;
+    @Autowired
+    private String sdncGenericResourcePath;
+    @Autowired
+    private String sdncCtxBuilderBasicAuthorization;
+
+    public SpringServiceImpl() {
+        // needed for instantiation
+    }
+
+
+    @Override
+    public ModelContext getContext(String serviceInstanceId, String transactionId) throws AuditException {
+        ModelContext context = null;
+        String url = "serviceInstanceId=" + serviceInstanceId + " transactionId=" + transactionId;
+        log.info("URL Query the SDN-C model data with URL: " , url);
+
+        // Retrieve the service instance information from SDNC and AAI
+        try {
+            String sdncResponse = RestUtil.getSdncGenericResource(jerseyClient, sdncBaseUrl, sdncBasicAuthorization, sdncGenericResourcePath, serviceInstanceId);
+            log.info("sdncResponse: ", sdncResponse);
+            context = RestUtil.transform(sdncResponse);
+        } catch (AuditException ae) {
+            throw ae;
+        } catch (Exception e) {
+            throw new AuditException(e.getLocalizedMessage());
+        }
+        return context;
+    }
+
+    public String getSdncAuthoriztion() {
+        return sdncCtxBuilderBasicAuthorization;
+    }
+
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/rs/RestService.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/rs/RestService.java
new file mode 100644
index 0000000..ec1581a
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/rs/RestService.java
@@ -0,0 +1,58 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.service.rs;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiResponse;
+import io.swagger.annotations.ApiResponses;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+
+@Api
+@Path("/service")
+@Produces({MediaType.APPLICATION_JSON})
+public interface RestService {
+
+    @GET
+    @Path("/context")
+    @Produces({MediaType.APPLICATION_JSON})
+    @ApiOperation(
+            value = "Respond SDNCContext Model Data",
+            notes = "Returns a JSON object which represents the SDNCConetxt model data",
+            response = Response.class
+    )
+    @ApiResponses(
+            value = {
+                    @ApiResponse(code = 200, message = "OK"),
+                    @ApiResponse(code = 400, message = "Bad Request"),
+                    @ApiResponse(code = 404, message = "Service not available"),
+                    @ApiResponse(code = 500, message = "Unexpected Runtime error")
+                    })
+    public Response getContext(@Context HttpHeaders headers,
+            @QueryParam("serviceInstanceId") String serviceInstanceId
+            );
+}
\ No newline at end of file
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/rs/RestServiceImpl.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/rs/RestServiceImpl.java
new file mode 100644
index 0000000..d3b6378
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/rs/RestServiceImpl.java
@@ -0,0 +1,81 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.service.rs;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.onap.pomba.common.datatypes.ModelContext;
+import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
+import org.onap.pomba.contextbuilder.sdnc.service.SpringService;
+import org.onap.pomba.contextbuilder.sdnc.util.RestUtil;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+
+@Component
+public class RestServiceImpl implements RestService {
+    private static final String EMPTY_JSON_STRING = "{}";
+
+    @Autowired
+    private SpringService service;
+
+
+    public RestServiceImpl() throws UnsupportedOperationException{
+    }
+
+    @Override
+    public Response getContext(HttpHeaders headers, String serviceInstanceId) {
+
+        Response response = null;
+        ModelContext sdncContext= null;
+        Gson gson = new GsonBuilder().create();
+        try {
+            // Do some validation on Http headers and URL parameters
+            RestUtil.validateHeader(headers, service.getSdncAuthoriztion());
+            RestUtil.validateURL(serviceInstanceId);
+
+            // Keep the same transaction id for logging purposeString transactionId
+            String transactionId = RestUtil.extractTranIdHeader(headers);
+
+            sdncContext = service.getContext(serviceInstanceId, transactionId);
+
+            if (sdncContext==null) {
+                // Return empty JSON
+                response = Response.ok().entity(EMPTY_JSON_STRING).build();
+            }else {
+                response = Response.ok().entity(gson.toJson(sdncContext)).build();
+            }
+        } catch (AuditException ce) {
+            if (ce.getHttpStatus() !=null) {
+                response = Response.status(ce.getHttpStatus()).entity(ce.getMessage()).build();
+            }else {
+                // No response received, could be the cases of network issue: i.e. unreachable host
+                response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(ce.getMessage()).build();
+            }
+        } catch (Exception e) {
+            response = Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
+        }
+
+        return response;
+    }
+
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java
new file mode 100644
index 0000000..806514c
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+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java
@@ -0,0 +1,150 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.util;
+
+import com.bazaarvoice.jolt.Chainr;
+import com.bazaarvoice.jolt.JsonUtils;
+import com.google.gson.Gson;
+import java.text.MessageFormat;
+import java.util.List;
+import java.util.UUID;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.json.JSONObject;
+import org.onap.pomba.common.datatypes.ModelContext;
+import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
+import org.onap.pomba.contextbuilder.sdnc.service.rs.RestService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RestUtil {
+
+    private static Logger log = LoggerFactory.getLogger(RestService.class);
+
+    public static final String INTERNAL_SERVER_ERROR   = "Internal Server Error";
+
+    // HTTP headers
+    public static final String TRANSACTION_ID = "X-TransactionId";
+    public static final String FROM_APP_ID = "X-FromAppId";
+    public static final String AUTHORIZATION = "Authorization";
+
+    // Parameters for Query SDNC Model Data REST API  URL
+    private static final String SERVICE_INSTANCE_ID = "serviceInstanceId";
+
+    private RestUtil() {
+    }
+
+    /**
+     * Validates the URL parameter.
+     * @throws AuditException if there is missing parameter
+     */
+    public static void validateURL(String serviceInstanceId) throws AuditException {
+
+        if (serviceInstanceId == null || serviceInstanceId.isEmpty())
+            throw new AuditException("Invalid request URL, missing parameter: "+ SERVICE_INSTANCE_ID, Status.BAD_REQUEST);
+    }
+
+
+    public static void validateHeader(HttpHeaders headers, String sdncCtxBuilderBasicAuthorization) throws AuditException {
+
+        String fromAppId = headers.getRequestHeaders().getFirst(FROM_APP_ID);
+        if((fromAppId == null) || fromAppId.trim().isEmpty()) {
+            throw new AuditException("Missing header parameter: "+ FROM_APP_ID, Status.BAD_REQUEST);
+        }
+
+        String headerAuthorization = headers.getRequestHeaders().getFirst(AUTHORIZATION);
+        if((headerAuthorization == null) || headerAuthorization.trim().isEmpty()) {
+            throw new AuditException("Missing header parameter: "+ AUTHORIZATION, Status.BAD_REQUEST);
+        }
+        if((!headerAuthorization.contentEquals(sdncCtxBuilderBasicAuthorization))) {
+            throw new AuditException("Failed Basic "+ AUTHORIZATION, Status.UNAUTHORIZED);
+        }
+    }
+
+
+    /*
+     * The purpose is to keep same transaction Id from north bound interface to south bound interface
+     */
+    public static String extractTranIdHeader(HttpHeaders headers)  {
+        String transactionId = null;
+        transactionId = headers.getRequestHeaders().getFirst(TRANSACTION_ID);
+        if((transactionId == null) || transactionId.trim().isEmpty()) {
+            transactionId = UUID.randomUUID().toString();
+            log.info("Header ", TRANSACTION_ID, " not present in request, generating new value: ", transactionId);
+        }
+        return transactionId;
+    }
+
+
+    /**
+     * For each AAI VnfInstance, use the AAI VfModuleId to make a rest call to SDNC VNF-API to create a list of all SDNC Vnfs.
+     * The URL for VNF-API is https://<SDN-C_HOST_NAME>:8543/restconf/config/VNF-API:vnfs/vnf-list/<vnf-id>
+     * @param sdncClient
+     * @param sdncBaseUrl
+     * @param authorization
+     * @param sdncGenericResourcePath
+     * @param serviceInstaceId
+     * @return
+     * @throws AuditException
+     */
+    public static String getSdncGenericResource(Client sdncClient, String sdncBaseUrl, String authorization, String sdncGenericResourcePath,
+                                                        String serviceInstaceId) throws AuditException {
+        String vnfSdncURL = sdncBaseUrl+generateSdncInstanceURL(sdncGenericResourcePath, serviceInstaceId);
+        // send rest request to SDNC VNF-API
+        return getSdncResource(sdncClient, vnfSdncURL, authorization);
+    }
+
+
+    public static ModelContext transform(String sdncResponse) {
+        List<Object> jsonSpec = JsonUtils.filepathToList("config/sdnccontextbuilder.spec");
+        Object jsonInput = JsonUtils.jsonToObject(sdncResponse);
+        Chainr chainr = Chainr.fromSpec(jsonSpec);
+        Object transObject = chainr.transform(jsonInput);
+        Gson gson = new Gson();
+        return gson.fromJson(JsonUtils.toPrettyJsonString(transObject), ModelContext.class);
+
+    }
+
+
+    private static String getSdncResource(Client sdncClient, String url, String authorization) throws AuditException  {
+
+        Response response = sdncClient.target(url).request()
+                .header("Accept", "application/json")
+                .header(AUTHORIZATION, authorization).get();
+
+        if (response.getStatus()  == 200) {
+            return response.readEntity(String.class);
+        } else if (response.getStatus() == 404) {
+            //Resource not found, generate empty JSON format
+            log.info("Return empty Json. Resource not found: ", url);
+            return new JSONObject().toString();
+
+        } else {
+            throw new AuditException(INTERNAL_SERVER_ERROR + " with " + response.getStatus());
+        }
+    }
+
+
+    private static String generateSdncInstanceURL(String siPath, String vfModuleLink) {
+        return MessageFormat.format(siPath, vfModuleLink);
+    }
+
+}