com.espertech.esper.runtime.client.util.LockStrategyWTimeout Maven / Gradle / Ivy
/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.runtime.client.util;
import com.espertech.esper.common.internal.util.ManagedReadWriteLock;
import java.util.concurrent.TimeUnit;
/**
* Obtains the write lock of the runtime-wide event processing read-write lock by trying the lock
* waiting for the timeout and throwing an exception if the lock was not taken.
*/
public class LockStrategyWTimeout implements LockStrategy {
private final long timeout;
private final TimeUnit unit;
/**
* Ctor.
*
* @param timeout timeout value in the unit given
* @param unit unit
*/
public LockStrategyWTimeout(long timeout, TimeUnit unit) {
this.timeout = timeout;
this.unit = unit;
}
public void acquire(ManagedReadWriteLock runtimeWideLock) throws LockStrategyException, InterruptedException {
boolean success = runtimeWideLock.getLock().writeLock().tryLock(timeout, unit);
if (!success) {
throw new LockStrategyException("Failed to obtain write lock of runtime-wide processing read-write lock");
}
}
public void release(ManagedReadWriteLock runtimeWideLock) {
runtimeWideLock.getLock().writeLock().unlock();
}
}