eXo Platform 4.0 Documentation > Reference Guide / GateIn > Applications Development > Portlet development

3.1.1. Portlet primer

3.1.1.1. The simplest portlet
3.1.1.2. JavaServer pages portlet example

JSR-168 and JSR-286 overview

The Java Community Process (JCP) uses Java Specification Requests (JSRs) to define proposed specifications and technologies designed for the Java platform.

The Portlet Specifications aim at defining portlets that can be used by any JSR-168 (Portlet 1.0) or JSR-286 (Portlet 2.0) portlet container.

Most Java EE (Enterprise Edition) portals include at least one compliant portlet container, and GateIn 3.5 is not exception. In fact, GateIn 3.5 includes a container that supports both versions.

This part gives a brief overview of the Portlet Specifications, but portlet developers are strongly encouraged to read the JSR-286 Portlet Specification.

GateIn 3.5 is fully JSR-286 compliant. Any JSR-168 or JSR-286 portlet operates as it is mandated by the respective specifications inside the portal.

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