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) 2020-2021 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.processing.api.BluePrintProcessingServiceGrpc;
  26 import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceStub;
  27 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput;
  28 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput;
  29 import org.onap.policy.cds.api.CdsProcessorListener;
  30 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
  31 import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
  32 import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 public class CdsProcessorHandler {
  37     private static final Logger LOGGER = LoggerFactory.getLogger(CdsProcessorHandler.class);
  38     private static final String LOG_MSG = "[{}|{}|{}|]{}{}";
  39
  40     private CdsProcessorListener listener;
  41     private String url;
  42
  43     CdsProcessorHandler(final CdsProcessorListener listener, String url) {
  44         this.listener = listener;
  45         this.url = url;
  46     }
  47
  48     CountDownLatch process(ExecutionServiceInput request, ManagedChannel channel) {
  49         final var header = request.getActionIdentifiers();
  50         LOGGER.info("Processing blueprint({}:{}) for action({})", header.getBlueprintVersion(),
  51             header.getBlueprintName(), header.getBlueprintVersion());
  52
  53         final var finishLatch = new CountDownLatch(1);
  54         final BluePrintProcessingServiceStub asyncStub = BluePrintProcessingServiceGrpc.newStub(channel);
  55         final StreamObserver<ExecutionServiceOutput> responseObserver = new StreamObserver<>() {
  56             @Override
  57             public void onNext(ExecutionServiceOutput output) {
  58                 NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, url, output.toString());
  59                 listener.onMessage(output);
  60             }
  61
  62             @Override
  63             public void onError(Throwable throwable) {
  64                 LOGGER.info(LOG_MSG, EventType.IN, CommInfrastructure.REST, url, NetLoggerUtil.SYSTEM_LS,
  65                                 throwable);
  66                 listener.onError(throwable);
  67                 finishLatch.countDown();
  68             }
  69
  70             @Override
  71             public void onCompleted() {
  72                 LOGGER.info("Completed blueprint({}:{}) for action({})", header.getBlueprintVersion(),
  73                     header.getBlueprintName(), header.getBlueprintVersion());
  74                 finishLatch.countDown();
  75             }
  76         };
  77
  78         final StreamObserver<ExecutionServiceInput> requestObserver = asyncStub.process(responseObserver);
  79         try {
  80             NetLoggerUtil.log(EventType.OUT, CommInfrastructure.REST, url, request.toString());
  81
  82             // Send the message to CDS backend for processing
  83             requestObserver.onNext(request);
  84             // Mark the end of requests
  85             requestObserver.onCompleted();
  86         } catch (RuntimeException e) {
  87             requestObserver.onError(e);
  88         }
  89         return finishLatch;
  90     }
  91 }