Package org.eclipse.rdf4j.sail.helpers
Class DirectoryLockManager
- java.lang.Object
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- org.eclipse.rdf4j.sail.helpers.DirectoryLockManager
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- All Implemented Interfaces:
LockManager
public class DirectoryLockManager extends Object implements LockManager
Used to create a lock in a directory.- Author:
- James Leigh, Arjohn Kampman
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Constructor Summary
Constructors Constructor Description DirectoryLockManager(File dir)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description StringgetLocation()Technical description of where the lock is located, such as a URL.booleanisLocked()Determines if the directory is locked.LocklockOrFail()Creates a lock in a directory if it does not yet exist.booleanrevokeLock()Revokes a lock owned by another process.LocktryLock()Creates a lock in a directory if it does not yet exist.
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Constructor Detail
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DirectoryLockManager
public DirectoryLockManager(File dir)
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Method Detail
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getLocation
public String getLocation()
Description copied from interface:LockManagerTechnical description of where the lock is located, such as a URL.- Specified by:
getLocationin interfaceLockManager
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isLocked
public boolean isLocked()
Determines if the directory is locked.- Specified by:
isLockedin interfaceLockManager- Returns:
trueif the directory is already locked.
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tryLock
public Lock tryLock()
Creates a lock in a directory if it does not yet exist.- Specified by:
tryLockin interfaceLockManager- Returns:
- a newly acquired lock or null if the directory is already locked.
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lockOrFail
public Lock lockOrFail() throws SailLockedException
Creates a lock in a directory if it does not yet exist.- Specified by:
lockOrFailin interfaceLockManager- Returns:
- a newly acquired lock.
- Throws:
SailLockedException- if the directory is already locked.
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revokeLock
public boolean revokeLock()
Revokes a lock owned by another process.- Specified by:
revokeLockin interfaceLockManager- Returns:
trueif a lock was successfully revoked.
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