Ivica Loncar's List: portal

• Extending GenericPortlet has the additional advantage of being able to use annotations for denoting special methods for handling events, processing actions, and rendering a specific portlet mode.
• Version 2.0 now introduces a new URL type, resource URLs. Resource URLs trigger the lifecycle method, serveResource, on the ResourceServingPortlet interface that you can leverage to create dynamic resources directly in the portlet.
• NOTE: Render parameters, portlet mode, and window state fall into this category as some portal implementations, such as WebSphere Portal, store this information in the URL to support the ability to bookmark and the use of Back and Forward buttons in the browser. This implementation means that changing a render parameter, for example, requires an update of all the URLs on the page, which the portal cannot perform, as the processing of the response data on the client is done entirely by the portlet.
• You can influence the HTTP caching behavior of resource requests with the setCacheability method on the ResourceURL.
• • Servlet lifecycle listeners
   
  • Portlet filters for wrapping the request / response
   
  • PortletURL listeners for manipulating the URL before it is written to the output stream
   
  • Portlet-managed modes allowing the portlet to provide its own portlet modes
• The JSR 286 tag library has its own namespace so that new additions do not interfere with portlets using the old JSR 168 tag library. You now need to include the new tag library with:  <%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>

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