/*
* 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
*
* https://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.tomcat.dbcp.pool2.impl;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
/**
* This sub-class was created to expose the waiting threads so that they can be
* interrupted when the pool using the queue that uses this lock is closed. The
* class is intended for internal use only.
* <p>
* This class is intended to be thread-safe.
* </p>
*
* @since 2.0
*/
final class InterruptibleReentrantLock extends ReentrantLock {
private static final long serialVersionUID = 1L;
/**
* Constructs a new InterruptibleReentrantLock with the given fairness policy.
*
* @param fairness true means threads should acquire contended locks as if
* waiting in a FIFO queue.
*/
InterruptibleReentrantLock(final boolean fairness) {
super(fairness);
}
/**
* Interrupts the threads that are waiting on a specific condition.
*
* @param condition the condition on which the threads are waiting.
*/
void interruptWaiters(final Condition condition) {
getWaitingThreads(condition).forEach(Thread::interrupt);
}
}