Add cps-tdmt-service code

Issue-ID: CPS-243
Signed-off-by: krishnaa96 <krishna.moorthy6@wipro.com>
Change-Id: I466bf00586dc8c11fcc50b673cf58d46ec461089

13 files changed, 642 insertions, 0 deletions

diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/client/CpsRestClient.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/client/CpsRestClient.java
new file mode 100644
index 0000000..c58ebd0
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/client/CpsRestClient.java
@@ -0,0 +1,79 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.client;
+
+import java.util.Arrays;
+import org.onap.cps.tbdmt.exception.CpsClientException;
+import org.onap.cps.tbdmt.model.AppConfiguration;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestTemplate;
+
+@Component
+public class CpsRestClient {
+
+    private static final String NODES_API_PATH = "%s/anchors/%s/nodes?cps-path=%s";
+
+    @Autowired
+    private RestTemplate restTemplate;
+
+    @Autowired
+    private AppConfiguration appConfiguration;
+
+    /**
+     * Fetch node from the CPS using xpath.
+     *
+     * @param anchor anchor
+     * @param xpath xpath query
+     * @return result Response string from CPS
+     */
+    public String fetchNode(final String anchor, final String xpath) throws CpsClientException {
+        final String url = appConfiguration.getXnfProxyUrl();
+
+        final String uri = String.format(NODES_API_PATH, url, anchor, xpath);
+
+        final HttpHeaders headers = new HttpHeaders();
+        headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
+        final HttpEntity<String> entity = new HttpEntity<>(headers);
+
+        ResponseEntity<String> responseEntity = null;
+        try {
+            responseEntity = restTemplate.exchange(uri, HttpMethod.GET, entity, String.class);
+        } catch (final Exception e) {
+            throw new CpsClientException(e.getLocalizedMessage());
+        }
+
+        final int statusCode = responseEntity.getStatusCodeValue();
+
+        if (statusCode == 200) {
+            return responseEntity.getBody();
+        } else {
+            throw new CpsClientException(
+                String.format("Response code from CPS other than 200: %d", statusCode));
+        }
+    }
+
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/db/TemplateRepository.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/db/TemplateRepository.java
new file mode 100644
index 0000000..bf9f41d
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/db/TemplateRepository.java
@@ -0,0 +1,31 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.db;
+
+import org.onap.cps.tbdmt.model.Template;
+import org.onap.cps.tbdmt.model.TemplateKey;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface TemplateRepository extends CrudRepository<Template, TemplateKey> {
+
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/CpsClientException.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/CpsClientException.java
new file mode 100644
index 0000000..293a5f8
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/CpsClientException.java
@@ -0,0 +1,28 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.exception;
+
+public class CpsClientException extends Exception {
+
+    public CpsClientException(final String exception) {
+        super(exception);
+    }
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/ExecuteException.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/ExecuteException.java
new file mode 100644
index 0000000..c89093c
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/ExecuteException.java
@@ -0,0 +1,32 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.OK)
+public class ExecuteException extends RuntimeException {
+
+    public ExecuteException(final String exception) {
+        super(exception);
+    }
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/TemplateNotFoundException.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/TemplateNotFoundException.java
new file mode 100644
index 0000000..dd52ca2
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/exception/TemplateNotFoundException.java
@@ -0,0 +1,32 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class TemplateNotFoundException extends RuntimeException {
+
+    public TemplateNotFoundException(final String exception) {
+        super(exception);
+    }
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/AppConfiguration.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/AppConfiguration.java
new file mode 100644
index 0000000..90666cd
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/AppConfiguration.java
@@ -0,0 +1,47 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.model;
+
+import java.util.Map;
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Getter
+@Setter
+@Configuration
+@EnableConfigurationProperties
+@ConfigurationProperties(prefix = "app")
+public class AppConfiguration {
+
+    private String xnfProxyUrl;
+    private Map<String, String> schemaToAnchor;
+
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/ErrorResponse.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/ErrorResponse.java
new file mode 100644
index 0000000..fa4fdef
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/ErrorResponse.java
@@ -0,0 +1,35 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.model;
+
+import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class ErrorResponse {
+
+    private String message;
+    private List<String> details;
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/ExecutionRequest.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/ExecutionRequest.java
new file mode 100644
index 0000000..322c6d4
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/ExecutionRequest.java
@@ -0,0 +1,36 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.model;
+
+import java.util.Map;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class ExecutionRequest {
+
+    private Map<String, String> inputParameters;
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/Template.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/Template.java
new file mode 100644
index 0000000..14f159f
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/Template.java
@@ -0,0 +1,52 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.model;
+
+import java.io.Serializable;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.IdClass;
+import javax.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+@Entity
+@Table(name = "Template")
+@IdClass(TemplateKey.class)
+public class Template implements Serializable {
+
+    private static final long serialVersionUID = 345L;
+
+    @Id
+    private String templateId;
+
+    @Id
+    private String model;
+
+    private String xpathTemplate;
+
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/TemplateKey.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/TemplateKey.java
new file mode 100644
index 0000000..ab465b9
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/TemplateKey.java
@@ -0,0 +1,43 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.model;
+
+import java.io.Serializable;
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@EqualsAndHashCode
+@AllArgsConstructor
+@NoArgsConstructor
+public class TemplateKey implements Serializable {
+
+    private static final long serialVersionUID = 400L;
+
+    private String templateId;
+
+    private String model;
+
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/TemplateRequest.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/TemplateRequest.java
new file mode 100644
index 0000000..c679a56
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/model/TemplateRequest.java
@@ -0,0 +1,47 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.model;
+
+import java.io.Serializable;
+import javax.validation.constraints.NotEmpty;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class TemplateRequest implements Serializable {
+
+    private static final long serialVersionUID = 543L;
+
+    @NotEmpty(message = "template id missing")
+    private String templateId;
+
+    @NotEmpty(message = "model missing")
+    private String model;
+
+    @NotEmpty(message = "template missing")
+    private String xpathTemplate;
+
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/service/ExecutionBusinessLogic.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/service/ExecutionBusinessLogic.java
new file mode 100644
index 0000000..ff72cf7
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/service/ExecutionBusinessLogic.java
@@ -0,0 +1,83 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.service;
+
+import com.hubspot.jinjava.Jinjava;
+import java.util.Map;
+import java.util.Optional;
+import org.onap.cps.tbdmt.client.CpsRestClient;
+import org.onap.cps.tbdmt.db.TemplateRepository;
+import org.onap.cps.tbdmt.exception.CpsClientException;
+import org.onap.cps.tbdmt.exception.ExecuteException;
+import org.onap.cps.tbdmt.exception.TemplateNotFoundException;
+import org.onap.cps.tbdmt.model.AppConfiguration;
+import org.onap.cps.tbdmt.model.ExecutionRequest;
+import org.onap.cps.tbdmt.model.Template;
+import org.onap.cps.tbdmt.model.TemplateKey;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ExecutionBusinessLogic {
+
+    @Autowired
+    private TemplateRepository templateRepository;
+
+    @Autowired
+    private AppConfiguration appConfiguration;
+
+    @Autowired
+    private CpsRestClient cpsRestClient;
+
+    /**
+     * Execute a template stored in the database.
+     *
+     * @param schemaSet schema set
+     * @param id id
+     * @param executionRequest inputs to be applied to the templates
+     * @return result response from the execution of template
+     */
+    public String executeTemplate(final String schemaSet, final String id, final ExecutionRequest executionRequest) {
+
+        final Optional<Template> templateOptional = templateRepository.findById(new TemplateKey(id, schemaSet));
+        if (templateOptional.isPresent()) {
+            return execute(templateOptional.get(), executionRequest.getInputParameters());
+        }
+        throw new TemplateNotFoundException("Template does not exist");
+    }
+
+    private String execute(final Template template, final Map<String, String> inputParameters) {
+        final String anchor = appConfiguration.getSchemaToAnchor().get(template.getModel());
+        if (anchor == null) {
+            throw new ExecuteException("Anchor not found for the schema");
+        }
+        final String xpath = generateXpath(template.getXpathTemplate(), inputParameters);
+        try {
+            return cpsRestClient.fetchNode(anchor, xpath);
+        } catch (final CpsClientException e) {
+            throw new ExecuteException(e.getLocalizedMessage());
+        }
+    }
+
+    private String generateXpath(final String xpathTemplate, final Map<String, String> templateParameters) {
+        return new Jinjava().render(xpathTemplate, templateParameters);
+    }
+}
diff --git a/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/service/TemplateBusinessLogic.java b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/service/TemplateBusinessLogic.java
new file mode 100644
index 0000000..f75352f
--- /dev/null
+++ b/cps-tbdmt-service/src/main/java/org/onap/cps/tbdmt/service/TemplateBusinessLogic.java
@@ -0,0 +1,97 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2021 Wipro 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=========================================================
+ */
+
+package org.onap.cps.tbdmt.service;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Optional;
+import org.onap.cps.tbdmt.db.TemplateRepository;
+import org.onap.cps.tbdmt.exception.TemplateNotFoundException;
+import org.onap.cps.tbdmt.model.Template;
+import org.onap.cps.tbdmt.model.TemplateKey;
+import org.onap.cps.tbdmt.model.TemplateRequest;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class TemplateBusinessLogic {
+
+    private static final String TEMPLATE_NOT_FOUND_ERROR = "Template not found for given id: %s";
+
+    @Autowired
+    private TemplateRepository templateRepository;
+
+    /**
+     * Create Template.
+     *
+     * @param templateRequest request object
+     * @return template
+     */
+    public Template createTemplate(final TemplateRequest templateRequest) {
+        final Template template = new Template(templateRequest.getTemplateId(),
+            templateRequest.getModel(),
+            templateRequest.getXpathTemplate());
+        return templateRepository.save(template);
+    }
+
+    /**
+     * Get All Templates.
+     *
+     * @return templates
+     */
+    public Collection<Template> getAllTemplates() {
+        final Collection<Template> templates = new HashSet<>();
+        templateRepository.findAll().forEach(templates::add);
+        return templates;
+    }
+
+    /**
+     * Get Template by Id.
+     *
+     * @param templateKey template id to find the template
+     * @return template
+     */
+    public Template getTemplate(final TemplateKey templateKey) {
+        final Optional<Template> template = templateRepository.findById(templateKey);
+        if (template.isPresent()) {
+            return template.get();
+        } else {
+            final String errorMessage = String.format(TEMPLATE_NOT_FOUND_ERROR,
+                templateKey.getTemplateId());
+            throw new TemplateNotFoundException(errorMessage);
+        }
+    }
+
+    /**
+     * Delete Template.
+     *
+     * @param templateKey template id to find the template
+     */
+    public void deleteTemplate(final TemplateKey templateKey) {
+        if (templateRepository.existsById(templateKey)) {
+            templateRepository.deleteById(templateKey);
+        } else {
+            final String errorMessage = String.format(TEMPLATE_NOT_FOUND_ERROR,
+                templateKey.getTemplateId());
+            throw new TemplateNotFoundException(errorMessage);
+        }
+    }
+}