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A portlet application is a group of logically associated portlets. At a minimum, a portlet application defines a single portlet, such as in weather portlet application. In practice, the application may contain several portlets such as the exchange2000 portlet application which contains five portlets as illustrated in Figure 2-3. Figure 2-3. A Portlet application with multiple portlets
Portlets defined in the same application may share configuration parameters set in the deployment descriptor or by the administrator at runtime. They also have the ability to communicate with each other with custom messages. Portlet Applications are defined in the deployment descriptors at development time and cannot be created dynamically by the administrator. From an administrative perspective, portlet applications allow repetitive administrative tasks to be completed on a group of portlets instead of on individual portlets. From a development perspective, portlet applications allow developers to provide for deployment all the portlets needed to achieve a business requirement and to ensure, at a minimum, that all these components are installed into the Portal Server. |
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