com.hammurapi.store

Class DeputyLock

java.lang.Object

com.hammurapi.store.DeputyLock

All Implemented Interfaces:

TrackingLock, Lock

public class DeputyLock
extends Object
implements TrackingLock

Lock which acts on behalf of another lock and acquires its own lock only if the master lock is not held. This lock is used for executing one logical store operation in multiple threads.

Constructor Summary

Constructors

Constructor and Description
DeputyLock(Lock master, boolean masterLocked, boolean canNotBeLocked, String msg)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isLocked()
void	lock()
void	lockInterruptibly()
Condition	newCondition()
boolean	tryLock()
boolean	tryLock(long time, TimeUnit unit)
void	unlock()

Methods inherited from class java.lang.Object

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

Constructor Detail

DeputyLock

public DeputyLock(Lock master,
          boolean masterLocked,
          boolean canNotBeLocked,
          String msg)

Method Detail

lock

public void lock()

Specified by:

lock in interface Lock

lockInterruptibly

public void lockInterruptibly()
                       throws InterruptedException

Specified by:

lockInterruptibly in interface Lock

Throws:

InterruptedException

tryLock

public boolean tryLock()

Specified by:

tryLock in interface Lock

tryLock

public boolean tryLock(long time,
              TimeUnit unit)
                throws InterruptedException

Specified by:

tryLock in interface Lock

Throws:

InterruptedException

unlock

public void unlock()

Specified by:

unlock in interface Lock

isLocked

public boolean isLocked()

Specified by:

isLocked in interface TrackingLock

newCondition

public Condition newCondition()

Specified by:

newCondition in interface Lock