Pass error message in the exception when thrown from CDS-Adapter

Issue-ID: SO-2494
Signed-off-by: prathamesh <prathamesh_morde@yahoo.ca>
Change-Id: I1990ba00ab55ed08c7ba8c31e6fe8fbedb428e7e

1 files changed, 77 insertions, 55 deletions

diff --git a/bpmn/MSOCommonBPMN/src/main/java/org/onap/so/client/cds/AbstractCDSProcessingBBUtils.java b/bpmn/MSOCommonBPMN/src/main/java/org/onap/so/client/cds/AbstractCDSProcessingBBUtils.java
index 5498b5be31..9741d4b6c2 100644
--- a/bpmn/MSOCommonBPMN/src/main/java/org/onap/so/client/cds/AbstractCDSProcessingBBUtils.java
+++ b/bpmn/MSOCommonBPMN/src/main/java/org/onap/so/client/cds/AbstractCDSProcessingBBUtils.java
@@ -24,7 +24,6 @@ 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.cds.controllerblueprints.common.api.ActionIdentifiers;
 import org.onap.ccsdk.cds.controllerblueprints.common.api.CommonHeader;
@@ -51,28 +50,29 @@ import io.grpc.Status;
  *
  */
 @Component
-public class AbstractCDSProcessingBBUtils implements CDSProcessingListener {
+public class AbstractCDSProcessingBBUtils {
 
     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 static final String RESPONSE_PAYLOAD = "CDSResponsePayload";
+    private static final String CDS_STATUS = "CDSStatus";
+    private static final String EXEC_INPUT = "executionServiceInput";
+
 
     /**
      * indicate exception thrown.
      */
     private static final String EXCEPTION = "Exception";
 
-
-    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) {
@@ -105,7 +105,7 @@ public class AbstractCDSProcessingBBUtils implements CDSProcessingListener {
                     ExecutionServiceInput.newBuilder().setCommonHeader(commonHeader)
                             .setActionIdentifiers(actionIdentifiers).setPayload(struct.build()).build();
 
-            execution.setVariable("executionServiceInput", executionServiceInput);
+            execution.setVariable(EXEC_INPUT, executionServiceInput);
 
         } catch (Exception ex) {
             exceptionUtil.buildAndThrowWorkflowException(execution, 7000, ex);
@@ -114,7 +114,7 @@ public class AbstractCDSProcessingBBUtils implements CDSProcessingListener {
 
     /**
      * 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) {
@@ -127,10 +127,11 @@ public class AbstractCDSProcessingBBUtils implements CDSProcessingListener {
                         "No RestProperty.CDSProperties implementation found on classpath, can't create client.");
             }
 
-            ExecutionServiceInput executionServiceInput =
-                    (ExecutionServiceInput) execution.getVariable("executionServiceInput");
+            ExecutionServiceInput executionServiceInput = (ExecutionServiceInput) execution.getVariable(EXEC_INPUT);
+
+            CDSResponse cdsResponse = new CDSResponse();
 
-            try (CDSProcessingClient cdsClient = new CDSProcessingClient(this)) {
+            try (CDSProcessingClient cdsClient = new CDSProcessingClient(new ResponseHandler(cdsResponse))) {
                 CountDownLatch countDownLatch = cdsClient.sendRequest(executionServiceInput);
                 countDownLatch.await(props.getTimeout(), TimeUnit.SECONDS);
             } catch (InterruptedException ex) {
@@ -138,61 +139,82 @@ public class AbstractCDSProcessingBBUtils implements CDSProcessingListener {
                 Thread.currentThread().interrupt();
             }
 
-            if (cdsResponse != null) {
-                String cdsResponseStatus = cdsResponse.get();
-                execution.setVariable("CDSStatus", cdsResponseStatus);
+            String cdsResponseStatus = cdsResponse.status;
+
+            /**
+             * throw CDS failed exception.
+             */
+            if (!cdsResponseStatus.equals(SUCCESS)) {
+                throw new BadResponseException("CDS call failed with status: " + cdsResponse.status
+                        + " and errorMessage: " + cdsResponse.errorMessage);
+            }
+
+            execution.setVariable(CDS_STATUS, cdsResponseStatus);
 
-                /**
-                 * throw CDS failed exception.
-                 */
-                if (cdsResponseStatus != SUCCESS) {
-                    throw new BadResponseException("CDS call failed with status: " + cdsResponseStatus);
-                }
+            if (cdsResponse.payload != null) {
+                String payload = JsonFormat.printer().print(cdsResponse.payload);
+                execution.setVariable(RESPONSE_PAYLOAD, payload);
             }
 
+
+
         } 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;
+    private class ResponseHandler implements CDSProcessingListener {
+
+        private CDSResponse cdsResponse;
+
+        ResponseHandler(CDSResponse cdsResponse) {
+            this.cdsResponse = cdsResponse;
         }
 
-    }
+        /**
+         * 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_PROCESSING:
+                    cdsResponse.status = PROCESSING;
+                    break;
+                case EVENT_COMPONENT_EXECUTED:
+                    cdsResponse.status = SUCCESS;
+                    break;
+                default:
+                    cdsResponse.status = FAILED;
+                    cdsResponse.errorMessage = message.getStatus().getErrorMessage();
+                    break;
+            }
+            cdsResponse.payload = message.getPayload();
+        }
 
-    /**
-     * 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);
-        cdsResponse.set(EXCEPTION);
+        /**
+         * 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);
+            cdsResponse.status = EXCEPTION;
+        }
     }
 
+    private class CDSResponse {
+
+        String status;
+        String errorMessage;
+        Struct payload;
+
+        @Override
+        public String toString() {
+            return "CDSResponse{" + "status='" + status + '\'' + ", errorMessage='" + errorMessage + '\'' + ", payload="
+                    + payload + '}';
+        }
+    }
 }