Package org.opencms.util

Class CmsPriorityLock

java.lang.Object

org.opencms.util.CmsPriorityLock

public class CmsPriorityLock
extends Object

Lock which can be acquired with two different priorities.

The lock can be only be held by one thread, but can be locked reentrantly by the owner. All waiting threads who requested the lock with high priority will be granted the lock first if it becomes available, before any threads who requested the lock with low priority.

Constructor Summary

Constructors

Constructor	Description
CmsPriorityLock()	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
void	lock(boolean highPriority)	Acquire the lock, with given priority.
void	unlock()	Releases the lock.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CmsPriorityLock

public CmsPriorityLock()

Creates a new instance.

Method Details

lock

public void lock(boolean highPriority)

Acquire the lock, with given priority.

Parameters:

highPriority - true for high-priority acquisition, false for low-priority

unlock

public void unlock()

Releases the lock.

Throws:

IllegalMonitorStateException - if called by a thread not owning the lock