You use IBM® WebSphere® Portlet Factory Designer to develop the portlet functionality.
WebSphere Portlet Factory Designer includes several builders useful in developing portlets for IBM WebSphere Portal server in addition to the more general builders used for J2EE application development. These builders include:
Adding this builder call to a model allows you to define portlet information such as a name and description as well as specifying the HTML pages or WebSphere Portlet Factory models to be used when the user configures or edits the portlet.Cooperative Portlet Source
Adding this builder call to a model lets you create portlets that can communicate with one another. With the Cooperative Portlet Target builder to define events and with Event Handler builder to associate actions with events, you establish an environment for communicating between portlets. Cooperation between source and target portlets is facilitated by the WebSphere Portal runtime entity called the Property Broker. Portlet Customizer
Parent topic: Developing portlets
Event Handler builder
Configuring the Portlet Adapter builder call