Package org.eclipse.rdf4j.sail

Interface LockManager

All Known Implementing Classes:

DirectoryLockManager

public interface LockManager

Author:

james

Method Summary

Modifier and Type	Method	Description
String	getLocation()	Technical description of where the lock is located, such as a URL.
boolean	isLocked()	Determines if the SAIL is locked.
Lock	lockOrFail()	Creates a lock in a SAIL if it does not yet exist.
boolean	revokeLock()	Revokes a lock owned by another process.
Lock	tryLock()	Creates a lock in a SAIL if it does not yet exist.

Method Details

getLocation

String getLocation()

Technical description of where the lock is located, such as a URL.

isLocked

boolean isLocked()

Determines if the SAIL is locked.

Returns:

true if the SAIL is already locked.

tryLock

Lock tryLock()

Creates a lock in a SAIL if it does not yet exist.

Returns:

a newly acquired lock or null if the SAIL is already locked.

lockOrFail

Lock lockOrFail()
         throws SailLockedException

Creates a lock in a SAIL if it does not yet exist.

Returns:

a newly acquired lock.

Throws:

SailLockedException - if the directory is already locked.

revokeLock

boolean revokeLock()

Revokes a lock owned by another process.

Returns:

true if a lock was successfully revoked.