org.jboss.cache.lock
Class LockStrategyReadCommitted

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

All Implemented Interfaces:

LockStrategy

public class LockStrategyReadCommitted
extends Object
implements LockStrategy

Transaction isolation level of READ_COMMITTED. Similar to read/write lock, but writers are not blocked on readers It prevents dirty read only.

Dirty read allows (t1) write and then (t2) read within two separate threads, all without transaction commit.

Version:

$Revision: 7168 $

Author:

Ben Wang

Constructor Summary

LockStrategyReadCommitted()

Method Summary

Lock	readLock() Return a read lock object.
Lock	upgradeLockAttempt(long msecs) Attempt to upgrade the current read lock to write lock with msecs timeout.
Lock	writeLock() Return a write lock object.

Methods inherited from class java.lang.Object

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

Constructor Detail

LockStrategyReadCommitted

public LockStrategyReadCommitted()

Method Detail

readLock

public Lock readLock()

Description copied from interface: LockStrategy

Return a read lock object.

Specified by:

readLock in interface LockStrategy

See Also:

LockStrategy.readLock()

upgradeLockAttempt

public Lock upgradeLockAttempt(long msecs)
                        throws UpgradeException

Description copied from interface: LockStrategy

Attempt to upgrade the current read lock to write lock with msecs timeout.

Specified by:

upgradeLockAttempt in interface LockStrategy

Parameters:

msecs - Timeout in milliseconds.

Returns:

Lock object. Will return null if timeout or failed.

Throws:

UpgradeException

See Also:

LockStrategy.upgradeLockAttempt(long)

writeLock

public Lock writeLock()

Description copied from interface: LockStrategy

Return a write lock object.

Specified by:

writeLock in interface LockStrategy

See Also:

LockStrategy.writeLock()