I want to suggest a very fine request-response framework that can make jetspeed-2 a powerful portal adaptable to any service extension and presentation engine. The pattern was developed by Struts committers based on commons-chain: http://cvs.apache.org/viewcvs/jakarta-commons-sandbox/chain/WHITEBOARD.html
The proof of concept via servlet protocol has been successfully completed using current nightly build of struts-example. All existing struts facilities and plug-ins should work.
The codes for JSR-168 portlet have also been done under commons-chain. The proof of concept for portlet protocol and interaction between web application portal and portlet container may soon be available under struts-chain of struts nightly built.
One handy feature available in commons-chain is a self-contained protocol context and service (portlet) catalog(s). The design pattern for struts-chain context is just simple thread-safe singleton. The performance can be better with cache and pool services.
I am currently looking into HiveMind and pico container as additional services to Struts and Pluto.
BaTien DBGROUPS
