org.jboss.cache.lock
Class LockStrategyRepeatableRead

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

All Implemented Interfaces:

LockStrategy

public class LockStrategyRepeatableRead
extends java.lang.Object
implements LockStrategy

Transaction isolation level of Repeatable_Read. It prevents dirty read and non-repeatable read.

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

Non-repeatable allows read allows (t1) read, (t2) write, and then (t1) read, all without transaction commit.

Version:

$Revision: 1.1.1.1 $

Author:

Ben Wang

Constructor Summary

LockStrategyRepeatableRead()

Method Summary

EDU.oswego.cs.dl.util.concurrent.Sync	readLock() Return a read lock object.
java.lang.String	toString()
EDU.oswego.cs.dl.util.concurrent.Sync	upgradeLockAttempt(long msecs) Attempt to upgrade the current read lock to write lock with msecs timeout.
EDU.oswego.cs.dl.util.concurrent.Sync	writeLock() Return a write lock object.

Methods inherited from class java.lang.Object

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

Constructor Detail

LockStrategyRepeatableRead

public LockStrategyRepeatableRead()

Method Detail

readLock

public EDU.oswego.cs.dl.util.concurrent.Sync readLock()

Description copied from interface: LockStrategy

Return a read lock object.

Specified by:

readLock in interface LockStrategy

Returns:

Sync (@see EDU.oswego.cs.dl.util.concurrent.Sync)

See Also:

LockStrategy.readLock()

upgradeLockAttempt

public EDU.oswego.cs.dl.util.concurrent.Sync 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:

Sync object. Will return null if timeout or failed.

Throws:

UpgradeException

See Also:

LockStrategy.upgradeLockAttempt(long)

writeLock

public EDU.oswego.cs.dl.util.concurrent.Sync writeLock()

Description copied from interface: LockStrategy

Return a write lock object.

Specified by:

writeLock in interface LockStrategy

Returns:

Sync (@see EDU.oswego.cs.dl.util.concurrent.Sync)

See Also:

LockStrategy.writeLock()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object