Turning Portlets into Services: The Consumer Profile
Oscar Diaz (University of the Basque Country)
Salvador Trujillo (University of the Basque Country)
Sandy Perez (University of the Basque Country)
Portlets strive to play at the front end the same role that Web services currently enjoy at the back end, namely, enablers of application assembly through reusable services. However, it is well-known in the component community that, the larger the component, the more reduced the reuse. Hence, the coarse-grained nature of portlets (they encapsulate also the presentation layer) can jeopardize this vision of portlets as reusable services. To avoid this situation, this work proposes a perspective shift in portlet development by introducing the notion of organization profile. While the user profile characterises the end user (e.g. age, name, etc), the organization profile captures the idiosyncrasies of the organization through which the portlet is being delivered (e.g. the portal owner) as far as the portlet functionality is concerned. The user profile is dynamic and hence, requires the portlet to be customised at run time. By contrast, the organization profile is known at registration time, and it is not always appropriate/possible to consider it at run time. Rather, it is better to customize the code at development time, and produce an organization-specific portlet which built-in, custom functionality. In this scenario, we no longer have a portlet but a family of portlets, and the portlet provider becomes the "assembly line" of this family. This work promotes this vision by introduces an organization-aware, WSRP-compliant architecture that let portlet consumers registry and handle "family portlets" in the same way that "traditional portlets". In so doing, portlets are nearer to become truly reusable services.
Shaughnessy, Friday, May 11, 2007, 10:30am to 12 noon.