eu.emi.dsr.util
Class FileWatcher

java.lang.Object
  eu.emi.dsr.util.FileWatcher

All Implemented Interfaces:

Runnable

public class FileWatcher
extends Object
implements Runnable

helper to watch a set of files and invoke a specific action if one of them was modified. This should be executed periodically, for example using the scheduled executor service from the ResourcePool

Author:

schuller, a.memon

Constructor Summary

FileWatcher(File target, Runnable action)

Method Summary

void	addTarget(File target) add a file to be watched Note: files are stored in a Set, so it is no problem if the same file is added repeatedly
boolean	removeTarget(File target)
void	run() check if one of the target files has been touched and invoke the action if it has
void	schedule(int delay, TimeUnit timeunit)

Methods inherited from class java.lang.Object

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

Constructor Detail

FileWatcher

public FileWatcher(File target,
                   Runnable action)
            throws FileNotFoundException

Throws:

FileNotFoundException

Method Detail

schedule

public void schedule(int delay,
                     TimeUnit timeunit)

addTarget

public void addTarget(File target)

add a file to be watched
Note: files are stored in a Set, so it is no problem if the same file is added repeatedly

Parameters:

target - - the file to watch

removeTarget

public boolean removeTarget(File target)

run

public void run()

check if one of the target files has been touched and invoke the action if it has

Specified by:

run in interface Runnable