Supported optional features of the JSR-286 Portlet Specification

Supported optional features of the JSR-286 Portlet Specification

The simple portal framework, which builds on top of the portlet container, is JSR-286-compliant. However, the WebSphere Application Server implementation supports a subset of the optional features in the JSR-286 Portlet Specification.

The following table lists the optional features available in the JSR-286 Portlet Specification and indicates to what extent these optional features are available in WAS.

Feature Availability
Container runtime options The following container runtime options are supported:

javax.portlet.escapeXml
javax.portlet.servletDefaultSessionScope
javax.portlet.actionScopedRequestAttributes

Setting the HTML head section elements using the MimeResponse.MARKUP_HEAD_ELEMENT property This property is not supported as its setting does not have an effect.
Custom portlet modes and custom window states The feature is supported, but without special treatment.
Portlet-managed modes This feature is fully supported.
Dynamically setting the portlet title using the RenderResponse.setTitle(String) method This feature is partially supported. You need to make use of this feature in a portlet document filter or an aggregation JSP file.
Dynamically setting the next possible portlet modes using the RenderResponse.setNextPossiblePortletModes(Collection<PortletMode>) method This feature is not supported.
Expiration and validation-based caching This feature is fully supported. We need to activate the portlet fragment caching and a cachespec.xml defined as a prerequisite.
Aliases in public render parameters The aliases in public render parameters are supported in the PortletServingServlet servlet and the aggregation tag library.
Aliases and wild cards in eventing These aliases and wild cards are not supported as setting these functions does not have an effect.

Related:

Portlet container
JSR 286 Portlet Specification
Introducing Java Portlet Specifications - JSR 168 and JSR 286

Feature	Availability
Container runtime options	The following container runtime options are supported: javax.portlet.escapeXml javax.portlet.servletDefaultSessionScope javax.portlet.actionScopedRequestAttributes
Setting the HTML head section elements using the MimeResponse.MARKUP_HEAD_ELEMENT property	This property is not supported as its setting does not have an effect.
Custom portlet modes and custom window states	The feature is supported, but without special treatment.
Portlet-managed modes	This feature is fully supported.
Dynamically setting the portlet title using the RenderResponse.setTitle(String) method	This feature is partially supported. You need to make use of this feature in a portlet document filter or an aggregation JSP file.
Dynamically setting the next possible portlet modes using the RenderResponse.setNextPossiblePortletModes(Collection<PortletMode>) method	This feature is not supported.
Expiration and validation-based caching	This feature is fully supported. We need to activate the portlet fragment caching and a cachespec.xml defined as a prerequisite.
Aliases in public render parameters	The aliases in public render parameters are supported in the PortletServingServlet servlet and the aggregation tag library.
Aliases and wild cards in eventing	These aliases and wild cards are not supported as setting these functions does not have an effect.