content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.camel.component.grpc.client;
  
  import java.util.LinkedList;
  import java.util.List;
  
  import io.grpc.stub.StreamObserver;
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  
  /*
   * gRPC response stream observer which is collecting response objects every
   * onNext() call into the list and setting them inside Body when onCompleted() invoked
   */
  public class GrpcResponseAggregationStreamObserver implements StreamObserver<Object> {
      private final Exchange exchange;
      private final AsyncCallback callback;
      private List<Object> responseCollection = new LinkedList<>();
  
      public GrpcResponseAggregationStreamObserver(Exchange exchange, AsyncCallback callback) {
          this.exchange = exchange;
          this.callback = callback;
      }
  
      @Override
      public void onNext(Object response) {
          responseCollection.add(response);
      }
  
      @Override
      public void onError(Throwable throwable) {
          exchange.setException(throwable);
          callback.done(false);
      }
  
      @Override
      public void onCompleted() {
          exchange.getMessage().setHeaders(exchange.getIn().getHeaders());
          exchange.getMessage().setBody(responseCollection);
          callback.done(false);
      }
  
  }
  