models-interactions/model-impl/cds/src/main/java/org/onap/policy/cds/client/CdsProcessorHandler.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * Copyright (C) 2019 Bell Canada.
   4  * Modifications Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
   5  * ================================================================================
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  * ============LICENSE_END=========================================================
  18  */
  19
  20 package org.onap.policy.cds.client;
  21
  22 import io.grpc.ManagedChannel;
  23 import io.grpc.stub.StreamObserver;
  24 import java.util.concurrent.CountDownLatch;
  25 import org.onap.ccsdk.cds.controllerblueprints.common.api.ActionIdentifiers;
  26 import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc;
  27 import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceStub;
  28 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput;
  29 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput;
  30 import org.onap.policy.cds.api.CdsProcessorListener;
  31 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
  32 import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
  33 import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 public class CdsProcessorHandler {
  38     private static final Logger LOGGER = LoggerFactory.getLogger(CdsProcessorHandler.class);
  39     private static final String LOG_MSG = "[{}|{}|{}|]{}{}";
  40
  41     private CdsProcessorListener listener;
  42     private String url;
  43
  44     CdsProcessorHandler(final CdsProcessorListener listener, String url) {
  45         this.listener = listener;
  46         this.url = url;
  47     }
  48
  49     CountDownLatch process(ExecutionServiceInput request, ManagedChannel channel) {
  50         final ActionIdentifiers header = request.getActionIdentifiers();
  51         LOGGER.info("Processing blueprint({}:{}) for action({})", header.getBlueprintVersion(),
  52             header.getBlueprintName(), header.getBlueprintVersion());
  53
  54         final CountDownLatch finishLatch = new CountDownLatch(1);
  55         final BluePrintProcessingServiceStub asyncStub = BluePrintProcessingServiceGrpc.newStub(channel);
  56         final StreamObserver<ExecutionServiceOutput> responseObserver = new StreamObserver<ExecutionServiceOutput>() {
  57             @Override
  58             public void onNext(ExecutionServiceOutput output) {
  59                 LOGGER.info(LOG_MSG, EventType.IN, CommInfrastructure.REST, url, NetLoggerUtil.SYSTEM_LS,
  60                                 output);
  61                 NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, url, output.toString());
  62
  63                 listener.onMessage(output);
  64             }
  65
  66             @Override
  67             public void onError(Throwable throwable) {
  68                 LOGGER.info(LOG_MSG, EventType.IN, CommInfrastructure.REST, url, NetLoggerUtil.SYSTEM_LS,
  69                                 throwable);
  70                 NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, url, throwable.toString());
  71                 listener.onError(throwable);
  72                 finishLatch.countDown();
  73             }
  74
  75             @Override
  76             public void onCompleted() {
  77                 LOGGER.info("Completed blueprint({}:{}) for action({})", header.getBlueprintVersion(),
  78                     header.getBlueprintName(), header.getBlueprintVersion());
  79                 finishLatch.countDown();
  80             }
  81         };
  82
  83         final StreamObserver<ExecutionServiceInput> requestObserver = asyncStub.process(responseObserver);
  84         try {
  85             LOGGER.info(LOG_MSG, EventType.OUT, CommInfrastructure.REST, url, NetLoggerUtil.SYSTEM_LS,
  86                             request);
  87             NetLoggerUtil.log(EventType.OUT, CommInfrastructure.REST, url, request.toString());
  88
  89             // Send the message to CDS backend for processing
  90             requestObserver.onNext(request);
  91             // Mark the end of requests
  92             requestObserver.onCompleted();
  93         } catch (RuntimeException e) {
  94             requestObserver.onError(e);
  95         }
  96         return finishLatch;
  97     }
  98 }