1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 package org.apache.hc.core5.concurrent; 28 29 /** 30 * Convenience base class for {@link FutureCallback}s that contribute a result 31 * of the operation to another {@link BasicFuture}. 32 * 33 * @param <T> the future result type of an asynchronous operation. 34 * @since 5.1 35 */ 36 public abstract class FutureContribution<T> implements FutureCallback<T> { 37 38 private final BasicFuture<?> future; 39 40 public FutureContribution(final BasicFuture<?> future) { 41 this.future = future; 42 } 43 44 @Override 45 public final void failed(final Exception ex) { 46 if (future != null) { 47 future.failed(ex); 48 } 49 } 50 51 @Override 52 public final void cancelled() { 53 if (future != null) { 54 future.cancel(); 55 } 56 } 57 58 }