|  |
Cache Invalidation Adapter for WebSphere Application Server
An adapter for WebSphere Application Server's dynamic cache that allows it to send invalidations for content that is cached on the Akamai network.
Date Posted: November 10, 2003
|
|
|
|
|
Update: February 4, 2004
Version 1.1 is no longer subject to problems with clock skew and now works with the newest version of Akamai's invalidation service.
What is Cache Invalidation Adapter for WebSphere® Application Server (WAS)?
Cache Invalidation Adapter for WAS is an adapter for WAS's dynamic cache that allows it to send invalidations for content that is cached on the Akamai® network. Most Web content today is dynamic and highly personalized, making it difficult to cache with traditional means. Both WAS's dynamic cache and Akamai's EdgeSuite® service provide methods for caching this content. Because of the nature of the content, it is important to be able to remove it from a cache on demand so that incorrect or stale content is not served to the user.
WebSphere Application Server's dynamic cache can be configured to automatically trigger invalidations. For example, when a log-out command is issued for User A, the dynamic cache can be configured to automatically invalidate all of User A's content. Cache Invalidation Adapter for WAS allows these invalidation messages to also be propagated to the Akamai network and invalidate content there as well. Invalidation configuration has to be done only once.
How does it work? Cache Invalidation Adapter for WAS implements WAS's ExternalCacheAdapter interface. When registered with WAS, it receives notifications of invalidation events. It then converts these invalidations into an appropriate format and sends them to Akamai's invalidation service, which propagates the invalidations throughout the Akamai network.
Other edge computing technologies available here at alphaWorks:
|
|
|
| | About the technology author(s):
Helen (Nell) Rehn is a staff software engineer in the WebSphere Platform System House Advanced Design and Technology group. She can be reached at Helen (Nell) Rehn. |
|
|
| |
|
