org.jboss.cache.lock
Class ReadWriteLockWithUpgrade

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

Direct Known Subclasses:

NonBlockingWriterLock (src)

public class ReadWriteLockWithUpgrade

extends java.lang.Object

activeWriter_

protected java.lang.Thread activeWriter_

upgraderLocal_

protected final java.lang.ThreadLocal upgraderLocal_

dummy_

protected static final java.lang.Object dummy_

readerLock_

protected final ReadWriteLockWithUpgrade.ReaderLock (src)  readerLock_

writerLock_

protected final ReadWriteLockWithUpgrade.WriterLock (src)  writerLock_

log_

protected static final Logger (src)  log_

ReadWriteLockWithUpgrade

public ReadWriteLockWithUpgrade()

toString

public java.lang.String toString()

writeLock

public Sync writeLock()

readLock

public Sync readLock()

upgradeLockAttempt

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

Attempt to obtain an upgrade to writer lock. If successful, the read lock is upgraded to write lock. If fails, the owner retains the read lock.

Parameters:

msecs - Time to wait in millisecons.

Returns:

Sync object. Null if not successful or timeout.

Throws:

UpgradeException (src)

changeLock

protected Sync changeLock()

cancelledWaitingReader

protected void cancelledWaitingReader()

cancelledWaitingWriter

protected void cancelledWaitingWriter()

allowReader

protected boolean allowReader()

Override this method to change to reader preference *

startRead

protected boolean startRead()

startWrite

protected boolean startWrite()

startReadFromNewReader

protected boolean startReadFromNewReader()

startWriteFromNewWriter

protected boolean startWriteFromNewWriter()

startReadFromWaitingReader

protected boolean startReadFromWaitingReader()

startWriteFromWaitingWriter

protected boolean startWriteFromWaitingWriter()

endRead

protected org.jboss.cache.lock.ReadWriteLockWithUpgrade.Signaller endRead()

Called upon termination of a read. Returns the object to signal to wake up a waiter, or null if no such

endWrite

protected org.jboss.cache.lock.ReadWriteLockWithUpgrade.Signaller endWrite()

Called upon termination of a write. Returns the object to signal to wake up a waiter, or null if no such