Wicket Portlet Primer

WICKET PORTLET PRIMER Ate Douma Portal Architect @ Hippo JSR-286 Portlet API 2.0 Expert Group Member JSR-301 Portlet Bridge Specification for JSF Expert Group Member Apache Software Foundation Member Apache Portals Committer and PMC Member Apache Wicket Committer and PMC Member a.douma@hippo.nl / ate@apache.org WICKET MEETUP AMSTERDAM NOV 2007 WICKET PORTLET PRIMER

Wicket Portlet Support History • Started (by me) in 2005 but failed to finish • Restarted by Janne 2006 -> Wicket 1.2 • Taken out again from Wicket core March 2007 • 3rd attempt (by me) May 2007 -> Wicket 1.3 WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

Portlets vs Servlets JSR-168 Portlet API 1.0 • Only generate content fragments no control over the response type • no “page” scope access • coexistence with other portlets or servlets in the same page/session • • Delegated URL creation and handling • 2 phase request processing (Action, Render) • Render state / parameters maintained by the container • No cookie support • No servlet dispatching during Action phase WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

JSR-286: Portlet API 2.0 • Portlet coordination: events & public render parameters • Portlet Filters • New type of URL: ResourceURL direct access to the portlet • full control over the response • • Servlet dispatching from action and event phase • Contributing to page <head> • Cookies supported WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

3 Ways of providing Portlet Support • Transparent Servlet / Portlet differences abstracted away in the framework • JSF • • Native requires “parallel” API hierarchies • (PortletPaqe vs WebPage, PortletRequestCycle vs WebRequestCycle) Cannot be (transparently) used as web applications and visa versa • Struts/WebWorks 2.0, Spring PortletMVC, Wicket 1.2.x • • Bridged Dispatching to the “servlet world” from one generic portlet • Wrapping and translating the “servlet” handling • Wicket 1.3 • WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

Limitations of the current Portlet Support • Requires JSR-286 features (not formally available yet) servlet dispatching during Action request phase • serving Resources / AJAX requests (requires full response control) • solved through custom Portals Bridges Interfaces • require portal specific implementation and support ● most portals already *can* support this, but need to be provided ● currently (known to be) working on Jetspeed-2 and Liferay (more or less) ● • Wicket (core) API and implementation needs to stick to certain rules (turned out to be rather easy so far) no direct usage / manipulation of the url both on the server and client • WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

Roadmap • waiting for JSR-286 (just a few more weeks...) • providing JSR-286 based WicketPortlet2 requires Java5 => Wicket 1.4.x • • Adding support for real JSR-286 features events • public render parameters • => Communication / coordination between Wicket “applications” • • Going to be (or already) used for Jetspeed-2 admin portlets • Hippo CMS 7 • ... • WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

Demo Wicket Examples in Jetspeed-2 WICKET PORTLET PRIMER WICKET MEETUP AMSTERDAM NOV 2007

Wicket Portlet Primer

by ate.douma

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