Package org.apache.wicket.request.resource.caching.version

Class CachingResourceVersion

java.lang.Object

org.apache.wicket.request.resource.caching.version.CachingResourceVersion

All Implemented Interfaces:

IResourceVersion

public class CachingResourceVersion
extends Object
implements IResourceVersion

Caches the results of a delegating IResourceVersion instance in a member variable. The cache will be valid for the lifetime of this instance. It will expire the oldest entries if the maximum number of entries is exceeded.

Since:

1.5

Author:

Peter Ertl

Constructor Summary

Constructors

Constructor	Description
CachingResourceVersion(IResourceVersion delegate)	create version cache
CachingResourceVersion(IResourceVersion delegate, int maxEntries)	create version cache

Method Summary

Modifier and Type	Method	Description
String	getVersion(IStaticCacheableResource resource)	get unique string identifying the version of the resource
Pattern	getVersionPattern()	a pattern that matches returned versions
void	invalidate(IStaticCacheableResource resource)	remove cacheable resource from cache
void	invalidateAll()

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingResourceVersion

public CachingResourceVersion(IResourceVersion delegate)

create version cache

the cache will accept up to 5000 before evicting the oldest entries.

Parameters:

delegate - delegating resource version provider

CachingResourceVersion

public CachingResourceVersion(IResourceVersion delegate,
                              int maxEntries)

create version cache

the cache will accept a maximum number of entries specified by maxEntries before evicting the oldest entries.

Parameters:

delegate - resource version provider

maxEntries - maximum number of cache entries

Method Detail

getVersion

public String getVersion(IStaticCacheableResource resource)

Description copied from interface: IResourceVersion

get unique string identifying the version of the resource

Specified by:

getVersion in interface IResourceVersion

Parameters:

resource - cacheable resource

Returns:

unique version string or null if version string could not be calculated

getVersionPattern

public Pattern getVersionPattern()

Description copied from interface: IResourceVersion

a pattern that matches returned versions

Specified by:

getVersionPattern in interface IResourceVersion

Returns:

a pattern or null if no pattern is available

invalidate

public void invalidate(IStaticCacheableResource resource)

remove cacheable resource from cache

Parameters:

resource - cacheable resource

invalidateAll

public void invalidateAll()