org.apache.log4j.helpers

Class FileWatchdog

java.lang.Object

java.lang.Thread

org.apache.log4j.helpers.FileWatchdog

All Implemented Interfaces:

java.lang.Runnable

public abstract class FileWatchdog
extends java.lang.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

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
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 java.lang.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

Constructors

Modifier	Constructor and Description
protected	FileWatchdog(java.lang.String filename)

Method Summary

Methods

Modifier and Type	Method and Description
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, clone, 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

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 java.lang.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(java.lang.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 java.lang.Runnable

Overrides:

run in class java.lang.Thread