common/src/main/java/org/onap/so/client/cds/CDSProcessingHandler.java

   1 /*
   2  * Copyright (C) 2019 Bell Canada.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.onap.so.client.cds;
  17
  18 import io.grpc.ManagedChannel;
  19 import io.grpc.stub.StreamObserver;
  20 import java.util.concurrent.CountDownLatch;
  21 import org.onap.ccsdk.apps.controllerblueprints.common.api.ActionIdentifiers;
  22 import org.onap.ccsdk.apps.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc;
  23 import org.onap.ccsdk.apps.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceStub;
  24 import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceInput;
  25 import org.onap.ccsdk.apps.controllerblueprints.processing.api.ExecutionServiceOutput;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 class CDSProcessingHandler {
  30
  31     private static final Logger log = LoggerFactory.getLogger(CDSProcessingHandler.class);
  32
  33     private CDSProcessingListener listener;
  34
  35     CDSProcessingHandler(final CDSProcessingListener listener) {
  36         this.listener = listener;
  37     }
  38
  39     CountDownLatch process(ExecutionServiceInput request, ManagedChannel channel) {
  40
  41         ActionIdentifiers header = request.getActionIdentifiers();
  42
  43         log.info("Processing blueprint({}:{}) for action({})", header.getBlueprintVersion(), header.getBlueprintName(),
  44             header.getBlueprintVersion());
  45
  46         final CountDownLatch finishLatch = new CountDownLatch(1);
  47
  48         final BluePrintProcessingServiceStub asyncStub = BluePrintProcessingServiceGrpc.newStub(channel);
  49
  50         final StreamObserver<ExecutionServiceOutput> responseObserver = new StreamObserver<ExecutionServiceOutput>() {
  51             @Override
  52             public void onNext(ExecutionServiceOutput output) {
  53                 listener.onMessage(output);
  54             }
  55
  56             @Override
  57             public void onError(Throwable t) {
  58                 listener.onError(t);
  59                 finishLatch.countDown();
  60             }
  61
  62             @Override
  63             public void onCompleted() {
  64                 log.info("Completed blueprint({}:{}) for action({})", header.getBlueprintVersion(),
  65                     header.getBlueprintName(), header.getBlueprintVersion());
  66                 finishLatch.countDown();
  67             }
  68         };
  69
  70         final StreamObserver<ExecutionServiceInput> requestObserver = asyncStub.process(responseObserver);
  71
  72         try {
  73             // Send our message to CDS backend for processing
  74             requestObserver.onNext(request);
  75             // Mark the end of requests
  76             requestObserver.onCompleted();
  77         } catch (RuntimeException e) {
  78             requestObserver.onError(e);
  79         }
  80         return finishLatch;
  81     }
  82 }