org.deegree.commons.utils.fam
Class FileAlterationMonitor

java.lang.Object
  org.deegree.commons.utils.fam.FileAlterationMonitor

public class FileAlterationMonitor
extends Object

File alteration monitor for monitoring changes in a directory. Supports recursive scanning and filters.

Version:

$Revision: $, $Date: $

Author:

Markus Schneider, last edited by: $Author: schneider $

See Also:

FileAlterationListener

Constructor Summary

FileAlterationMonitor(File dir, long interval, boolean recurse, FileFilter filter)
Creates a new FileAlterationMonitor.

Method Summary

void	registerListener(FileAlterationListener listener) Registers a FileAlterationListener which is notified when changes are detected.
void	removeListener(FileAlterationListener listener) Removes a FileAlterationListener.
void	start() Starts the file alteration monitor worker thread.
void	stop() Stops the file alteration monitor worker thread.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileAlterationMonitor

public FileAlterationMonitor(File dir,
                             long interval,
                             boolean recurse,
                             FileFilter filter)

Creates a new FileAlterationMonitor.

Parameters:

dir - directory to be monitored

interval - number of milliseconds to wait between checks

recurse - if true, subdirectories (and their subdirectories, ...) are monitored as well

filter - optional filter that allows to specify for which files events should be generated, may be null (report changes on all files)

Method Detail

registerListener

public void registerListener(FileAlterationListener listener)

Registers a FileAlterationListener which is notified when changes are detected.

Parameters:

listener - listener to be registered

removeListener

public void removeListener(FileAlterationListener listener)

Removes a FileAlterationListener.

Parameters:

listener - listener to be removed

start

public void start()

Starts the file alteration monitor worker thread.

Throws:

RuntimeException - if the worker thread is already running

stop

public void stop()

Stops the file alteration monitor worker thread.

Throws:

RuntimeException - if the worker thread wasn't running