org.apache.log4j.helpers
Class FileWatchdog

java.lang.Object
  java.lang.Thread
      org.apache.log4j.helpers.FileWatchdog

All Implemented Interfaces:

Runnable

public abstract class FileWatchdog
extends Thread

Check every now and then that a certain file has not changed. If it has, then call the doOnChange() method.

Since:

version 0.9.1

Author:

Ceki Gülcü

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

static long	DEFAULT_DELAY The default delay between every file modification check, set to 60 seconds.
protected long	delay The delay to observe between every check.
protected String	filename The name of the file to observe for changes.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

protected

FileWatchdog(String filename)

Method Summary

protected void	checkAndConfigure()
protected abstract void	doOnChange()
void	run()
void	setDelay(long delay) Set the delay to observe between each check of the file changes.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DELAY

public static final long DEFAULT_DELAY

The default delay between every file modification check, set to 60 seconds.

See Also:

Constant Field Values

filename

protected String filename

The name of the file to observe for changes.

delay

protected long delay

The delay to observe between every check. By default set DEFAULT_DELAY.

Constructor Detail

FileWatchdog

protected FileWatchdog(String filename)

Method Detail

setDelay

public void setDelay(long delay)

Set the delay to observe between each check of the file changes.

doOnChange

protected abstract void doOnChange()

checkAndConfigure

protected void checkAndConfigure()

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread