net.ontopia.utils
Class FileWatchdog

java.lang.Object
  java.lang.Thread
      net.ontopia.utils.FileWatchdog

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

ActionConfigWatchdog

public abstract class FileWatchdog
extends java.lang.Thread

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

Since:

1.4

Nested Class Summary

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

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

Field Summary

static long	DEFAULT_DELAY The default delay between every file modification check, set to 6 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

protected	FileWatchdog()
protected	FileWatchdog(java.lang.String filename)

Method Summary

protected void	checkAndConfigure()
protected abstract void	doOnChange()
protected void	initialize(java.lang.String filename)
void	run()
void	setDelay(long delay) Sets 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 6 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()

FileWatchdog

protected FileWatchdog(java.lang.String filename)

Method Detail

initialize

protected void initialize(java.lang.String filename)

setDelay

public void setDelay(long delay)

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

Parameters:

delay - - The delay in milliseconds, in the case of a negative value the further execution is interrupted.

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