Package 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

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

Since:

version 0.9.1

Nested Class Summary

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

Thread.Builder, Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field	Description
static final 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

Constructors

Modifier	Constructor	Description
protected	FileWatchdog(String fileName)

Method Summary

Modifier and Type	Method	Description
protected void	checkAndConfigure()
protected abstract void	doOnChange()
void	run()
void	setDelay(long delayMillis)	Sets the delay in milliseconds to observe between each check of the file changes.

Methods inherited from class java.lang.Thread

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

Methods inherited from class java.lang.Object

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

Field Details

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 Details

FileWatchdog

protected FileWatchdog(String fileName)

Method Details

checkAndConfigure

protected void checkAndConfigure()

doOnChange

protected abstract void doOnChange()

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

setDelay

public void setDelay(long delayMillis)

Sets the delay in milliseconds to observe between each check of the file changes.

Parameters:

delayMillis - the delay in milliseconds