org.benow.web.cache
Class CacheDirectoryManager

java.lang.Object
  org.benow.web.cache.CacheDirectoryManager

public class CacheDirectoryManager
extends java.lang.Object

A cache directory. Files are added to the cache directory and associated with one or more other file dependencies. If a dependency changes, the cache file is invalidated.

The manager handles the modification registration and invalidation, as well as persistence and integrity across reboots.

Note: there is no handling of per-user content or security.

Author:

andy

Nested Class Summary

class

CacheDirectoryManager.SaveThread

Constructor Summary

CacheDirectoryManager(java.io.File cacheDir)

Method Summary

CacheEntry	addMonitor(java.io.File dep, java.io.File cacheFile) Creates a new entry, where the given dep (which must exist) is a dependency of the given depOf.
CacheEntry	addMonitor(java.net.URL currURL, java.io.File cacheFile) Creates an entry for the given URL.
boolean	invalidate(java.io.File dep)

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheDirectoryManager

public CacheDirectoryManager(java.io.File cacheDir)

Method Detail

addMonitor

public CacheEntry addMonitor(java.io.File dep,
                             java.io.File cacheFile)

Creates a new entry, where the given dep (which must exist) is a dependency of the given depOf. If the dep changes, the depOf is removed. This can be called several times with the same dep and other depOfs. The returned CacheEntry contains info about the current cache state.

Parameters:

dep -

cacheFiles -

Returns:

addMonitor

public CacheEntry addMonitor(java.net.URL currURL,
                             java.io.File cacheFile)

Creates an entry for the given URL. The url must either be to a local file or to a jar. The jar or file is monitored for changes. If the url is invalid, null is returned.

Parameters:

currURL -

cacheFile -

invalidate

public boolean invalidate(java.io.File dep)