1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.pool2.impl; 18 19 import java.util.concurrent.locks.Condition; 20 import java.util.concurrent.locks.ReentrantLock; 21 22 /** 23 * This sub-class was created to expose the waiting threads so that they can be 24 * interrupted when the pool using the queue that uses this lock is closed. The 25 * class is intended for internal use only. 26 * <p> 27 * This class is intended to be thread-safe. 28 * </p> 29 * 30 * @since 2.0 31 */ 32 class InterruptibleReentrantLock extends ReentrantLock { 33 34 private static final long serialVersionUID = 1L; 35 36 /** 37 * Constructs a new InterruptibleReentrantLock with the given fairness policy. 38 * 39 * @param fairness true means threads should acquire contended locks as if 40 * waiting in a FIFO queue 41 */ 42 public InterruptibleReentrantLock(final boolean fairness) { 43 super(fairness); 44 } 45 46 /** 47 * Interrupts the threads that are waiting on a specific condition 48 * 49 * @param condition the condition on which the threads are waiting. 50 */ 51 public void interruptWaiters(final Condition condition) { 52 getWaitingThreads(condition).forEach(Thread::interrupt); 53 } 54 }