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 java.lang.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

Constructor Summary

CachingResourceVersion(IResourceVersion delegate)
create version cache

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

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.

Method Summary

java.lang.String

getVersion(IStaticCacheableResource resource) get unique string identifying the version of the resource

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 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 java.lang.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