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.client;
  
  import java.nio.ByteBuffer;
  
  /**
   * Callback for the result of a single RPC. This will be invoked once with either success or
   * failure.
   */
  public interface RpcResponseCallback {
    /**
     * Successful serialized result from server.
     *
     * After `onSuccess` returns, `response` will be recycled and its content will become invalid.
     * Please copy the content of `response` if you want to use it after `onSuccess` returns.
     */
    void onSuccess(ByteBuffer response);
  
    /** Exception either propagated from server or raised on client side. */
    void onFailure(Throwable e);
  }
  