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

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * Copyright (C) 2019-2021 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                 NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, url, output.toString());
  60                 listener.onMessage(output);
  61             }
  62
  63             @Override
  64             public void onError(Throwable throwable) {
  65                 LOGGER.info(LOG_MSG, EventType.IN, CommInfrastructure.REST, url, NetLoggerUtil.SYSTEM_LS,
  66                                 throwable);
  67                 listener.onError(throwable);
  68                 finishLatch.countDown();
  69             }
  70
  71             @Override
  72             public void onCompleted() {
  73                 LOGGER.info("Completed blueprint({}:{}) for action({})", header.getBlueprintVersion(),
  74                     header.getBlueprintName(), header.getBlueprintVersion());
  75                 finishLatch.countDown();
  76             }
  77         };
  78
  79         final StreamObserver<ExecutionServiceInput> requestObserver = asyncStub.process(responseObserver);
  80         try {
  81             NetLoggerUtil.log(EventType.OUT, CommInfrastructure.REST, url, request.toString());
  82
  83             // Send the message to CDS backend for processing
  84             requestObserver.onNext(request);
  85             // Mark the end of requests
  86             requestObserver.onCompleted();
  87         } catch (RuntimeException e) {
  88             requestObserver.onError(e);
  89         }
  90         return finishLatch;
  91     }
  92 }