com.conversantmedia.util.concurrent

Interface OptimisticLock

All Known Implementing Classes:

SequenceLock

public interface OptimisticLock

Created by jcairns on 2/12/16.

Method Summary

Modifier and Type	Method and Description
long	readLock() Aquire a lock token for reading
boolean	readLockHeld(long lockToken) check if optimistic locking succeeded
long	tryWriteLock()
long	tryWriteLock(long time, TimeUnit unit)
long	tryWriteLockInterruptibly()
void	unlock(long sequence) "commit" or unlock the sequence when the write lock is held
long	writeLock() Acquire the lock for writing, waiting if needed

Method Detail

readLock

long readLock()

Aquire a lock token for reading

Returns:

long - the token indicating the lock state

readLockHeld

boolean readLockHeld(long lockToken)

check if optimistic locking succeeded

Parameters:

lockToken - - the value returned from tryLock

Returns:

boolean - true if lock was held

writeLock

long writeLock()

Acquire the lock for writing, waiting if needed

Returns:

long - the token indicating the lock state

tryWriteLockInterruptibly

long tryWriteLockInterruptibly()
                        throws InterruptedException

Returns:

long - the token indicating the lock state

Throws:

InterruptedException - - on interrupt

tryWriteLock

long tryWriteLock()

Returns:

long - the token indicating the lock state, or 0 if not available

tryWriteLock

long tryWriteLock(long time,
                  TimeUnit unit)
           throws InterruptedException

Returns:

long - the token indicating the lock state, or 0 if not available

Throws:

InterruptedException - on interrupt

unlock

void unlock(long sequence)

"commit" or unlock the sequence when the write lock is held

Parameters:

sequence - - lock sequence to unlock