Use two-phase rendering with JSR 286 portlets

For portlets conforming to JSR 286, IBM WebSphere Portal includes support for two-phase rendering, which allows portlets to set cookies and the HTTP headers and to change the portal page title dynamically.

• Enable two-phase rendering for a portlet
  By default, two-phase rendering is turned off. To enable two-phase rendering for a portlet, update the portlet.xml deployment descriptors for the portlet.
• Set headers for a JSR 286 portlet
  To set HTTP header information in the JSR 286 portlet, use the setProperty and addProperty methods of the PortletResponse.
• Set cookies for a JSR 286 portlet
  Although cookies can be set like any other HTTP header, the portlet API provides the addProperty convenience method on the PortletResponse for setting cookies.
• Modify the HTML head section of a JSR 286 portlet
  To write into the HTML head section of the JSR 286 portlet, for example, to change a page title, use the addProperty method on the PortletResponse.
• Set portlet caching values for a JSR 286 portlet
  We can dynamically modify portlet caching parameters for a JSR 286 portlet during the render phase.

Parent: Standard portlet API
Related reference:
WSRP two-phase rendering