org.quartz.impl.jdbcjobstore
Interface Semaphore

All Known Implementing Classes:

SimpleSemaphore, StdRowLockSemaphore

public interface Semaphore

An interface for providing thread/resource locking in order to protect resources from being altered by multiple threads at the same time.

Author:

jhouse

Method Summary

boolean	isLockOwner(java.sql.Connection conn, java.lang.String lockName) Determine whether the calling thread owns a lock on the identified resource.
boolean	obtainLock(java.sql.Connection conn, java.lang.String lockName) Grants a lock on the identified resource to the calling thread (blocking until it is available).
void	releaseLock(java.sql.Connection conn, java.lang.String lockName) Release the lock on the identified resource if it is held by the calling thread.

Method Detail

obtainLock

public boolean obtainLock(java.sql.Connection conn,
                          java.lang.String lockName)
                   throws LockException

Grants a lock on the identified resource to the calling thread (blocking until it is available).

Returns:

true if the lock was obtained.

releaseLock

public void releaseLock(java.sql.Connection conn,
                        java.lang.String lockName)
                 throws LockException

Release the lock on the identified resource if it is held by the calling thread.

isLockOwner

public boolean isLockOwner(java.sql.Connection conn,
                           java.lang.String lockName)
                    throws LockException

Determine whether the calling thread owns a lock on the identified resource.