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LockManagerImpl (JBossCache API) - JBoss 4.0.1 sp1 Cache API Documentation 英文版文档

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org.jboss.cache.lock
Class LockManagerImpl

java.lang.Object
  org.jboss.cache.lock.LockManagerImpl

All Implemented Interfaces:

LockManager

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public class LockManagerImpl

extends Object

implements LockManager

Version:

$Revision: 1.2 $

Author:

Bela Ban Apr 10, 2003

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Field Summary
protected  boolean	dirty_reads_allowed

 

Constructor Summary

LockManagerImpl()

 

Method Summary
boolean	getDirtyReadsAllowed()           Can we read values changed in another (uncommitted) transaction ? If true we can have read-locks; otherwise only write-locks will be acquired
void	getReadLock(TreeCache cache, String fqn, long timeout)           Acquires a read lock.
void	getWriteLock(TreeCache cache, String fqn, long timeout)           Acquires a write-lock.
void	releaseLock(String fqn, boolean release_children)
void	setDirtyReadsAllowed(boolean flag)

 

Methods inherited from class java.lang.Object

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

 

Field Detail

dirty_reads_allowed

protected boolean dirty_reads_allowed

Constructor Detail

LockManagerImpl

public LockManagerImpl()

Method Detail

getDirtyReadsAllowed

public boolean getDirtyReadsAllowed()

Description copied from interface: LockManager

Can we read values changed in another (uncommitted) transaction ? If true we can have read-locks; otherwise only write-locks will be acquired

Specified by:

getDirtyReadsAllowed in interface LockManager

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setDirtyReadsAllowed

public void setDirtyReadsAllowed(boolean flag)

Specified by:

setDirtyReadsAllowed in interface LockManager

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getReadLock

public void getReadLock(TreeCache cache,
                        String fqn,
                        long timeout)
                 throws TimeoutException

Description copied from interface: LockManager

Acquires a read lock. If the lock cannot be acquired within the timeout, a TimeoutExeption will be thrown. If the current thread already owns the read-lock, or owns the write-lock, this will succeed.

Specified by:

getReadLock in interface LockManager

Parameters:

cache -

fqn -

timeout -

Throws:

TimeoutException

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getWriteLock

public void getWriteLock(TreeCache cache,
                         String fqn,
                         long timeout)
                  throws TimeoutException,
                         UpgradeException

Description copied from interface: LockManager

Acquires a write-lock. If the lock cannot be acquired within the timeout, a TimeoutExeption will be thrown. If the current thread already owns the write-lock, this will succeed. If the current thread own the read-lock, it will try to upgrade the read-lock to write-lock status. If this fails, an UpgradeException will be thrown.

Specified by:

getWriteLock in interface LockManager

Parameters:

cache -

fqn -

timeout -

Throws:

TimeoutException

UpgradeException

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releaseLock

public void releaseLock(String fqn,
                        boolean release_children)

Specified by:

releaseLock in interface LockManager

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