Package org.bonitasoft.engine.lock

Interface LockService

All Known Implementing Classes:

MemoryLockService

public interface LockService

This service allows to synchronize access to a resource using ReadWrite lock pattern. Creating an exclusive lock allows to be the only one at a time accessing the resource.

Author:

Elias Ricken de Medeiros, Baptiste Mesta, Matthieu Chaffotte

See Also:

• ReentrantReadWriteLock

Method Summary

Modifier and Type	Method	Description
BonitaLock	lock(long objectToLockId, String objectType)	Acquire the lock for the object having type and id in parameters This method wait for the lock to be available
BonitaLock	tryLock(long objectToLockId, String objectType, long timeout, TimeUnit timeUnit)	Acquire the lock for the object having type and id in parameters waiting maximum timeout This method wait for the lock to be available.
void	unlock(BonitaLock lock)

Method Details

unlock

void unlock(BonitaLock lock)
     throws SLockException

Throws:

SLockException

lock

BonitaLock lock(long objectToLockId,
 String objectType)
         throws SLockException,
SLockTimeoutException

Acquire the lock for the object having type and id in parameters
This method wait for the lock to be available

Parameters:

objectToLockId -

objectType -

Returns:

the lock

Throws:

SLockException - when we were unable to lock due to an unexpected error

SLockTimeoutException - when we were unable to lock due to a timeout

tryLock

BonitaLock tryLock(long objectToLockId,
 String objectType,
 long timeout,
 TimeUnit timeUnit)
            throws SLockException

Acquire the lock for the object having type and id in parameters waiting maximum timeout
This method wait for the lock to be available. If it becomes available before the timeout expires the returns the obtained lock, else returns null

Parameters:

objectToLockId -

objectType -

timeout -

timeUnit -

Returns:

the obtained lock if it has been acquired before the timeout expires or null if the timeout has expired.

Throws:

SLockException - when we were unable to lock (not because of the timeout)