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org.apache.lucene.store

Class SimpleFSLockFactory

public class SimpleFSLockFactory
extends LockFactory
Implements LockFactory using File.createNewFile(). This is currently the default LockFactory used for FSDirectory if no LockFactory instance is otherwise provided. Note that there are known problems with this locking implementation on NFS.
See Also:
LockFactory

Field Summary

Fields inherited from class org.apache.lucene.store.LockFactory

lockPrefix

Constructor Summary

SimpleFSLockFactory(File lockDir)
Instantiate using the provided directory (as a File instance).
SimpleFSLockFactory(String lockDirName)
Instantiate using the provided directory name (String).

Method Summary

void
clearLock(String lockName)
Attempt to clear (forcefully unlock and remove) the specified lock.
protected void
init(File lockDir)
Lock
makeLock(String lockName)
Return a new Lock instance identified by lockName.

Methods inherited from class org.apache.lucene.store.LockFactory

clearLock, getLockPrefix, makeLock, setLockPrefix

Constructor Details

SimpleFSLockFactory

public SimpleFSLockFactory(File lockDir)
            throws IOException
Instantiate using the provided directory (as a File instance).
Parameters:
lockDir - where lock files should be created.

SimpleFSLockFactory

public SimpleFSLockFactory(String lockDirName)
            throws IOException
Instantiate using the provided directory name (String).
Parameters:
lockDirName - where lock files should be created.

Method Details

clearLock

public void clearLock(String lockName)
            throws IOException
Attempt to clear (forcefully unlock and remove) the specified lock. Only call this at a time when you are certain this lock is no longer in use.
Overrides:
clearLock in interface LockFactory
Parameters:
lockName - name of the lock to be cleared.

init

protected void init(File lockDir)
            throws IOException

makeLock

public Lock makeLock(String lockName)
Return a new Lock instance identified by lockName.
Overrides:
makeLock in interface LockFactory
Parameters:
lockName - name of the lock to be created.

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