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 io.grpc.stub.StreamObserver;
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.apache.camel.component.grpc.GrpcConfiguration;
  import org.apache.camel.component.grpc.GrpcUtils;
  
  /**
   * An exchange forwarder that creates a RPC request for each camel Exchange.
   */
  class GrpcSimpleExchangeForwarder implements GrpcExchangeForwarder {
  
      private final GrpcConfiguration configuration;
  
      private final Object grpcStub;
  
      public GrpcSimpleExchangeForwarder(GrpcConfiguration configuration, Object grpcStub) {
          this.configuration = configuration;
          this.grpcStub = grpcStub;
  
      }
  
      @Override
      public boolean forward(Exchange exchange, StreamObserver<Object> responseObserver, AsyncCallback callback) {
          Message message = exchange.getIn();
          try {
              GrpcUtils.invokeAsyncMethod(grpcStub, configuration.getMethod(), message.getBody(), responseObserver);
          } catch (Exception e) {
              exchange.setException(e);
              callback.done(true);
              return true;
          }
          return false;
      }
  
      @Override
      public void forward(Exchange exchange) {
          Message message = exchange.getIn();
          Object outBody = GrpcUtils.invokeSyncMethod(grpcStub, configuration.getMethod(), message.getBody());
          exchange.getMessage().setHeaders(exchange.getIn().getHeaders());
          exchange.getMessage().setBody(outBody);
      }
  
      @Override
      public void shutdown() {
      }
  }
  