DirectoryLockManager (Eclipse RDF4J 4.2.4)

java.lang.Object
- org.eclipse.rdf4j.sail.helpers.DirectoryLockManager

All Implemented Interfaces:

LockManager
```
public class DirectoryLockManager
extends Object
implements LockManager
```
Used to create a lock in a directory.

Author:

James Leigh, Arjohn Kampman

Constructor Summary

Constructors
Constructor Description

DirectoryLockManager(File dir)

Method Summary

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DirectoryLockManager
```
public DirectoryLockManager(File dir)
```
- Method Detail
  - getLocation
```
public String getLocation()
```
    Description copied from interface: LockManager
    
    Technical description of where the lock is located, such as a URL.
    
    Specified by:
    
    getLocation in interface LockManager
  - isLocked
```
public boolean isLocked()
```
    Determines if the directory is locked.
    
    Specified by:
    
    isLocked in interface LockManager
    
    Returns:
    
    true if the directory is already locked.
  - tryLock
```
public Lock tryLock()
```
    Creates a lock in a directory if it does not yet exist.
    
    Specified by:
    
    tryLock in interface LockManager
    
    Returns:
    
    a newly acquired lock or null if the directory is already locked.
  - lockOrFail
```
public Lock lockOrFail()
                throws SailLockedException
```
    Creates a lock in a directory if it does not yet exist.
    
    Specified by:
    
    lockOrFail in interface LockManager
    
    Returns:
    
    a newly acquired lock.
    
    Throws:
    
    SailLockedException - if the directory is already locked.
  - revokeLock
```
public boolean revokeLock()
```
    Revokes a lock owned by another process.
    
    Specified by:
    
    revokeLock in interface LockManager
    
    Returns:
    
    true if a lock was successfully revoked.