Package org.eclipse.rdf4j.sail.helpers

Class DirectoryLockManager

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 Details

    • DirectoryLockManager

      public DirectoryLockManager(File dir)

  • Method Details

    • 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.