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Object caching is an important piece in the design and developmentof Web portals. In a typical Web portal application, we need thefrequently accessed data in a JVM's memory, but, at the same time,we want the ability to automatically clear the data from memorywhen it's stale and refresh it with new data. Currently many opensource implementations provide object caching in J2EE Webapplications. This article describes a reusable object-cachingframework created to cache data objects in a Web portalapplication. This framework can be seamlessly integrated into anyWeb application. Author Srini Penchikala discusses implementingobject caching using three open source caching frameworks: JavaCaching System, OSCache, and Java Object Cache. He presents theseframeworks' installation and configuration details. Finally, hepresents a performance comparison to show the effectiveness ofcaching objects.