org.jboss.cache.lock
Class LockStrategyRepeatableRead

java.lang.Object
  extended by 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


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