org.jboss.cache.lock
Class LockStrategyRepeatableRead

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

All Implemented Interfaces:

LockStrategy (src)

public class LockStrategyRepeatableRead

extends java.lang.Object

implements LockStrategy (src)

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.

LockStrategyRepeatableRead

public LockStrategyRepeatableRead()

readLock

public Sync readLock()

Description copied from interface: LockStrategy (src)

Return a read lock object.

Specified by:

readLock in interface LockStrategy (src)

Returns:

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

See Also:

LockStrategy.readLock()

upgradeLockAttempt

public Sync upgradeLockAttempt(long msecs)
                        throws UpgradeException (src) 

Description copied from interface: LockStrategy (src)

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

Specified by:

upgradeLockAttempt in interface LockStrategy (src)

Parameters:

msecs - Timeout in milliseconds.

Returns:

Sync object. Will return null if timeout or failed.

Throws:

UpgradeException (src)

See Also:

LockStrategy.upgradeLockAttempt(long)

writeLock

public Sync writeLock()

Description copied from interface: LockStrategy (src)

Return a write lock object.

Specified by:

writeLock in interface LockStrategy (src)

Returns:

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

See Also:

LockStrategy.writeLock()

toString

public java.lang.String toString()