A colleague of mine recently pointed out an interesting presentation from CCLRC Daresbury Laboratory (University of Portsmouth) comparing experiences with open source portals WSRP development and testing.
By standardizing presentation-oriented web services, WSRP makes it possible to construct web portals in "plug-and-play" mode. This presentation compares WSRP support for the eXo Platform, Liferay, StringBeans and uPortal. WSRP4J, which is not a portal framework but a reference implementation of the WSRP 1.0 specification and the basis of WSRP support in many portal frameworks, is also discussed. In summary, WSRP Open Source implementations are still in early stages. From a producer standpoint, WSRP4J is clearly the most compatible of all and can be accessed by all the reviewed WSRP consumers. From a consumer standpoint, none of the consumers are fully functional. From Xiaobo Yang, Xiao Dong Wang and Rob Allan presentation, the test summary is shown below.