The new cooperative portlets feature of WebSphere Portal lets you set up portlet-to-portlet communication with a greater degree of flexibility than possible prior to Version 5.1. You can make two or more portlets communicate with each other regardless of whether they are on the same portal page or different portal pages. Plus, the communication can be dynamic: portlets can send each other messages that are either runtime user inputs or parameter values of a URL link. To enable you to create cooperative portlets, WebSphere Portal provides the property broker feature (introduced in Version 5.0) and the portlet wiring tool (introduced in Version 5.1). This article provides a complete, working example of creating cooperative Struts portlets with dynamic data exchange. You will see exactly what you need to do to apply the property broker and portlet wiring tool to make Struts portlets send runtime user inputs to each other. The files for the working example are available for download from The Sphere Web site.
http://www.spherejournal.com/archive/Volume_02_(2006)/Issue_02_(May_and_June)/v2i2a1.cfm?session=