FileWatchdog (Apache Log4j 1.2.17 API)

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

Fields
Modifier and Type	Field	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 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

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	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 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