+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2019 TechMahindra
+ * ================================================================================
+ * 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.so.client.cds;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+
+import org.camunda.bpm.engine.delegate.DelegateExecution;
+import org.onap.ccsdk.apps.controllerblueprints.common.api.ActionIdentifiers;
+import org.onap.ccsdk.apps.controllerblueprints.common.api.CommonHeader;
+import org.onap.ccsdk.apps.controllerblueprints.common.api.EventType;
+import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceInput;
+import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceOutput;
+import org.onap.so.client.PreconditionFailedException;
+import org.onap.so.client.RestPropertiesLoader;
+import org.onap.so.client.cds.beans.AbstractCDSPropertiesBean;
+import org.onap.so.client.exception.ExceptionBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.google.protobuf.Struct;
+import com.google.protobuf.Struct.Builder;
+import com.google.protobuf.util.JsonFormat;
+
+import io.grpc.Status;
+
+/**
+ * Util class to support Call to CDS client
+ *
+ */
+@Component
+public class AbstractCDSProcessingBBUtils implements CDSProcessingListener {
+
+ private static final Logger logger = LoggerFactory.getLogger(AbstractCDSProcessingBBUtils.class);
+
+ private static final String SUCCESS = "Success";
+ private static final String FAILED = "Failed";
+ private static final String PROCESSING = "Processing";
+
+ private final AtomicReference<String> cdsResponse = new AtomicReference<>();
+
+ @Autowired
+ private ExceptionBuilder exceptionUtil;
+
+ /**
+ * Extracting data from execution object and building the ExecutionServiceInput
+ * Object
+ *
+ * @param execution
+ * DelegateExecution object
+ */
+ public void constructExecutionServiceInputObject(DelegateExecution execution) {
+ logger.trace("Start AbstractCDSProcessingBBUtils.preProcessRequest ");
+
+ try {
+ AbstractCDSPropertiesBean executionObject = (AbstractCDSPropertiesBean) execution
+ .getVariable("executionObject");
+
+ String payload = executionObject.getRequestObject();
+
+ CommonHeader commonHeader = CommonHeader.newBuilder().setOriginatorId(executionObject.getOriginatorId())
+ .setRequestId(executionObject.getRequestId()).setSubRequestId(executionObject.getSubRequestId())
+ .build();
+ ActionIdentifiers actionIdentifiers = ActionIdentifiers.newBuilder()
+ .setBlueprintName(executionObject.getBlueprintName())
+ .setBlueprintVersion(executionObject.getBlueprintVersion())
+ .setActionName(executionObject.getActionName()).setMode(executionObject.getMode()).build();
+
+ Builder struct = Struct.newBuilder();
+ try {
+ JsonFormat.parser().merge(payload, struct);
+ } catch (InvalidProtocolBufferException e) {
+ logger.error("Failed to parse received message. blueprint({}:{}) for action({}). {}",
+ executionObject.getBlueprintVersion(), executionObject.getBlueprintName(),
+ executionObject.getActionName(), e);
+ }
+
+ ExecutionServiceInput executionServiceInput = ExecutionServiceInput.newBuilder()
+ .setCommonHeader(commonHeader).setActionIdentifiers(actionIdentifiers).setPayload(struct.build())
+ .build();
+
+ execution.setVariable("executionServiceInput", executionServiceInput);
+
+ } catch (Exception ex) {
+ exceptionUtil.buildAndThrowWorkflowException(execution, 7000, ex);
+ }
+ }
+
+ /**
+ * get the executionServiceInput object from execution and send a request to CDS
+ * Client and wait for TIMEOUT period
+ *
+ * @param execution
+ * DelegateExecution object
+ */
+ public void sendRequestToCDSClient(DelegateExecution execution) {
+
+ logger.trace("Start AbstractCDSProcessingBBUtils.sendRequestToCDSClient ");
+ try {
+ CDSProperties props = RestPropertiesLoader.getInstance().getNewImpl(CDSProperties.class);
+ if (props == null) {
+ throw new PreconditionFailedException(
+ "No RestProperty.CDSProperties implementation found on classpath, can't create client.");
+ }
+
+ ExecutionServiceInput executionServiceInput = (ExecutionServiceInput) execution
+ .getVariable("executionServiceInput");
+
+ CDSProcessingListener cdsProcessingListener = new AbstractCDSProcessingBBUtils();
+
+ CDSProcessingClient cdsClient = new CDSProcessingClient(cdsProcessingListener);
+ CountDownLatch countDownLatch = cdsClient.sendRequest(executionServiceInput);
+
+ try {
+ countDownLatch.await(props.getTimeout(), TimeUnit.SECONDS);
+ } catch (InterruptedException ex) {
+ logger.error("Caught exception in sendRequestToCDSClient in AbstractCDSProcessingBBUtils : ", ex);
+ } finally {
+ cdsClient.close();
+ }
+
+ if (cdsResponse != null) {
+ execution.setVariable("CDSStatus", cdsResponse.get());
+ }
+
+ } catch (Exception ex) {
+ exceptionUtil.buildAndThrowWorkflowException(execution, 7000, ex);
+ }
+ }
+
+ /**
+ * Get Response from CDS Client
+ *
+ */
+ @Override
+ public void onMessage(ExecutionServiceOutput message) {
+ logger.info("Received notification from CDS: {}", message);
+ EventType eventType = message.getStatus().getEventType();
+
+ switch (eventType) {
+
+ case EVENT_COMPONENT_FAILURE:
+ // failed processing with failure
+ cdsResponse.set(FAILED);
+ break;
+ case EVENT_COMPONENT_PROCESSING:
+ // still processing
+ cdsResponse.set(PROCESSING);
+ break;
+ case EVENT_COMPONENT_EXECUTED:
+ // done with async processing
+ cdsResponse.set(SUCCESS);
+ break;
+ default:
+ cdsResponse.set(FAILED);
+ break;
+ }
+
+ }
+
+ /**
+ * On error at CDS, log the error
+ */
+ @Override
+ public void onError(Throwable t) {
+ Status status = Status.fromThrowable(t);
+ logger.error("Failed processing blueprint {}", status, t);
+ }
+
+}