org.apache.commons.configuration.reloading
Class FileChangedReloadingStrategy

java.lang.Object
  org.apache.commons.configuration.reloading.FileChangedReloadingStrategy

All Implemented Interfaces:

ReloadingStrategy

public class FileChangedReloadingStrategy

extends Object

implements ReloadingStrategy

A reloading strategy that will reload the configuration every time its underlying file is changed. The file is not reloaded more than once every 5 seconds by default, this time can be changed by setting the refresh delay. This strategy only works with FileConfiguration instances.

Since:

1.1

Version:

$Revision$, $Date: 2005-03-02 20:29:39 +0100 (Wed, 02 Mar 2005) $

Author:

Emmanuel Bourg

Field Summary

protected FileConfiguration	configuration
protected long	lastChecked The last time the file was checked for changes.
protected long	lastModified The last time the configuration file was modified.
protected long	refreshDelay The minimum delay in milliseconds between checks.

Constructor Summary

FileChangedReloadingStrategy()

Method Summary

long	getRefreshDelay() Return the minimal time in milliseconds between two reloadings.
protected boolean	hasChanged() Check if the configuration has changed since the last time it was loaded.
void	init() Initialize the strategy.
void	reloadingPerformed() Notify the strategy that the file has been reloaded.
boolean	reloadingRequired() Tell if the evaluation of the strategy requires to reload the configuration.
void	setConfiguration(FileConfiguration configuration) Set the configuration managed by this strategy.
void	setRefreshDelay(long refreshDelay) Set the minimal time between two reloadings.
protected void	updateLastModified() Update the last modified time.

Methods inherited from class java.lang.Object

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

Field Detail

configuration

protected FileConfiguration configuration

lastModified

protected long lastModified

The last time the configuration file was modified.

lastChecked

protected long lastChecked

The last time the file was checked for changes.

refreshDelay

protected long refreshDelay

The minimum delay in milliseconds between checks.

Constructor Detail

FileChangedReloadingStrategy

public FileChangedReloadingStrategy()

Method Detail

setConfiguration

public void setConfiguration(FileConfiguration configuration)

Description copied from interface: ReloadingStrategy

Set the configuration managed by this strategy.

Specified by:

setConfiguration in interface ReloadingStrategy

init

public void init()

Description copied from interface: ReloadingStrategy

Initialize the strategy.

Specified by:

init in interface ReloadingStrategy

reloadingRequired

public boolean reloadingRequired()

Description copied from interface: ReloadingStrategy

Tell if the evaluation of the strategy requires to reload the configuration.

Specified by:

reloadingRequired in interface ReloadingStrategy

reloadingPerformed

public void reloadingPerformed()

Description copied from interface: ReloadingStrategy

Notify the strategy that the file has been reloaded.

Specified by:

reloadingPerformed in interface ReloadingStrategy

getRefreshDelay

public long getRefreshDelay()

Return the minimal time in milliseconds between two reloadings.

setRefreshDelay

public void setRefreshDelay(long refreshDelay)

Set the minimal time between two reloadings.

Parameters:

refreshDelay - refresh delay in milliseconds

updateLastModified

protected void updateLastModified()

Update the last modified time.

hasChanged

protected boolean hasChanged()

Check if the configuration has changed since the last time it was loaded.