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.CallOptions;
  import io.grpc.Channel;
  import io.grpc.ClientCall;
  import io.grpc.ClientInterceptor;
  import io.grpc.ForwardingClientCall.SimpleForwardingClientCall;
  import io.grpc.Metadata;
  import io.grpc.MethodDescriptor;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class GrpcMockClientInterceptor implements ClientInterceptor {
  
      private static final Logger LOG = LoggerFactory.getLogger(GrpcMockClientInterceptor.class);
  
      @Override
      public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(
              MethodDescriptor<ReqT, RespT> methodDescriptor, CallOptions callOptions, Channel channel) {
          return new SimpleForwardingClientCall<ReqT, RespT>(channel.newCall(methodDescriptor, callOptions)) {
              @Override
              public void start(Listener<RespT> responseListener, Metadata headers) {
                  LOG.info("Grpc Client Interceptor intercepted client call, forwarding now.");
                  super.start(responseListener, headers);
              }
          };
      }
  }
  