content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.worker.grpc;
  
  import alluxio.grpc.DataMessageMarshaller;
  import alluxio.grpc.DataMessageMarshallerProvider;
  
  import io.grpc.stub.StreamObserver;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.annotation.concurrent.NotThreadSafe;
  
  /**
   * A {@link StreamObserver} that handles raw data buffers.
   *
   * @param <ResT> type of the response message
   * @param <ReqT> type of the request message
   */
  @NotThreadSafe
  public class DataMessageServerRequestObserver<ReqT, ResT>
      extends DataMessageMarshallerProvider<ReqT, ResT> implements StreamObserver<ResT> {
    private static final Logger LOG =
        LoggerFactory.getLogger(DataMessageServerRequestObserver.class);
  
    private final StreamObserver<ResT> mObserver;
  
    /**
     * @param observer the original response observer
     * @param requestMarshaller the marshaller for the request
     * @param responseMarshaller the marshaller for the response
     */
    public DataMessageServerRequestObserver(StreamObserver<ResT> observer,
        DataMessageMarshaller<ReqT> requestMarshaller,
        DataMessageMarshaller<ResT> responseMarshaller) {
      super(requestMarshaller, responseMarshaller);
      mObserver = observer;
    }
  
    @Override
    public void onNext(ResT value) {
      mObserver.onNext(value);
    }
  
    @Override
    public void onError(Throwable t) {
      mObserver.onError(t);
    }
  
    @Override
    public void onCompleted() {
      mObserver.onCompleted();
    }
  }
  