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;
  
  import io.grpc.stub.StreamObserver;
  import org.apache.camel.Endpoint;
  import org.apache.camel.Exchange;
  import org.apache.camel.support.DefaultProducer;
  
  public class GrpcProducerToRouteControlledStreamObserver extends DefaultProducer {
      public GrpcProducerToRouteControlledStreamObserver(Endpoint endpoint) {
          super(endpoint);
      }
  
      @Override
      public void process(Exchange exchange) throws Exception {
          StreamObserver<Object> observer = exchange.getProperty(
                  GrpcConstants.GRPC_RESPONSE_OBSERVER, StreamObserver.class);
          String eventType = exchange.getMessage().getHeader(
                  GrpcConstants.GRPC_EVENT_TYPE_HEADER, String.class);
          switch (eventType) {
              case GrpcConstants.GRPC_EVENT_TYPE_ON_NEXT -> observer.onNext(exchange.getMessage().getBody());
              case GrpcConstants.GRPC_EVENT_TYPE_ON_COMPLETED -> observer.onCompleted();
              case GrpcConstants.GRPC_EVENT_TYPE_ON_ERROR -> observer.onError((Throwable) exchange.getMessage().getBody());
              default -> {
                  // NO-OP
              }
          }
      }
  }
  