Portlet的API编程

Abstract portlet与concrete portlet

The portlet.xml deployment descriptor is used by the portal server to identify the abstract and concrete portlet applications you wish to deploy. An abstract portlet application contains one or more abstract portlets. A concrete portlet application contains one or more concrete portlets. The abstract application is used as a foundation for concrete applications. The combination of an abstract application and configuration parameters creates a concrete application. Each portlet.xml may only define a single abstract portlet application.

如下图

Concrete portlet app is composed of more than one concrete portlet.Abstract portlet app is composed of more than one abstract portlet.

Certain configuration parameters are set at the abstract level while others are set at the concrete level. As expected, parameters set at the abstract level affect each concrete application. The parameters and configuration information unique to each concrete application are represented in a PortletApplicationSettings object. Parameter and configuration information unique to each portlet are represented in the PortletSettings object. When the portlet is actually placed on a page, it is parameterized by a PortletData object.