Java Portlet Specification

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The Java Portlet Specification defines a contract between the portlet container and portlets and provides a convenient programming model for Java portlet developers.

JSR 168[edit]

The Java Portlet Specification V1.0 was developed under the Java Community Process as Java Specification Request JSR 168, and released in its final form in October 2003.[1]

The Java Portlet Specification V1.0 introduces the basic portlet programming model with:

  • two phases of action processing and rendering in order to support the Model-View-Controller pattern.
  • portlet modes, enabling the portal to advise the portlet what task it should perform and what content it should generate
  • window states, indicating the amount of portal page space that will be assigned to the content generated by the portlet
  • portlet data model, allowing the portlet to store view information in the render parameters, session related information in the portlet session and per user persistent data in the portlet preferences
  • a packaging format in order to group different portlets and other Java EE artifacts needed by these portlets into one portlet application which can be deployed on the portal server.
  • Portal development as a way to integrate the different web-based applications for supporting deliveries of information and services.

JSR 286[edit]

JSR-286 is the Java Portlet specification v2.0 as developed under the JCP and created in alignment with the updated version 2.0 of WSRP. It was released in June 2008.[2] It was developed to improve on the short-comings on version 1.0 of the specification, JSR-168. Some of its major features include:[3]

  • Inter-Portlet Communication through events and public render parameters
  • Serving dynamically generated resources directly through portlets
  • Serving AJAX or JSON data directly through portlets
  • Introduction of portlet filters and listeners

JSR 362[edit]

JSR-362 is the Java Portlet specification v3.0. Currently it is in early draft status. [4]

See also[edit]


External links[edit]