JSR-168 Portlet Support
Configuration
As specified in the documentation PDF the factory.requestHelper property
must be specified in the displaytag.properties file in your applications
classpath. To configure portlet support for the displaytag library
ensure the displaytag-portlet.jar is in the classpath and the following
line is in your displaytag.properties file.
factory.requestHelper=org.displaytag.portlet.PortletRequestHelperFactory
Usage
The displaytag-portlet library needs access to the
javax.portlet.PortletRequest and javax.portlet.RenderResponse objects
for the request the JSP is rendering in. The library uses the
javax.servlet.jsp.PageContext\#findAttribute method to locate the
request and response objects using the names javax.portlet.request and
javax.portlet.response.
To provide these objects it is recommended they be bound as request attributes using these names. If your portal uses the Apache Pluto portlet container the objects will already be bound to the request using the appropriate names.