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.spark.network.server;
  
  import java.nio.ByteBuffer;
  
  import org.apache.spark.network.client.RpcResponseCallback;
  import org.apache.spark.network.client.TransportClient;
  
  /** An RpcHandler suitable for a client-only TransportContext, which cannot receive RPCs. */
  public class NoOpRpcHandler extends RpcHandler {
    private final StreamManager streamManager;
  
    public NoOpRpcHandler() {
      streamManager = new OneForOneStreamManager();
    }
  
    @Override
    public void receive(TransportClient client, ByteBuffer message, RpcResponseCallback callback) {
      throw new UnsupportedOperationException("Cannot handle messages");
    }
  
    @Override
    public StreamManager getStreamManager() { return streamManager; }
  }
  