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1   /*
2    * Copyright 2013 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.util.concurrent;
17  
18  import java.util.EventListener;
19  
20  /**
21   * Listens to the result of a {@link Future}.  The result of the asynchronous operation is notified once this listener
22   * is added by calling {@link Future#addListener(GenericFutureListener)}.
23   */
24  public interface GenericFutureListener<F extends Future<?>> extends EventListener {
25  
26      /**
27       * Invoked when the operation associated with the {@link Future} has been completed.
28       *
29       * @param future  the source {@link Future} which called this callback
30       */
31      void operationComplete(F future) throws Exception;
32  }