org.jboss.cache.lock
Class LockStrategySerializable

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

All Implemented Interfaces:

LockStrategy

public class LockStrategySerializable
extends java.lang.Object
implements LockStrategy

Lock strategy of Serializable that prevents dirty read, non-repeatable read, and phantom read.

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

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

Phantom read allows (t1) read n rows, (t2) insert k rows, and (t1) read n+k rows.

Version:

$Revision: 1.2 $

Author:

Ben Wang July 15, 2003

Constructor Summary

LockStrategySerializable()

Method Summary

EDU.oswego.cs.dl.util.concurrent.Sync	readLock() Return a read lock object.
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, toString, wait, wait, wait

Constructor Detail

LockStrategySerializable

public LockStrategySerializable()

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()