The WSRP Producer for WebSphere Application Server does not support the WSRP Registration interface. Therefore, WSRP registration is not supported.State:
The WSRP Producer for WebSphere Application Server is a stateless Producer. Therefore, the Producer does not track the state of the portlet applications. The Producer pushes the state to the Consumer. The Consumer is responsible for maintaining the state of the applications, and returning the appropriate state to the Producer when a user interacts with an application.Custom portlet modes and custom window states:
The WSRP Producer for WebSphere Application Server does not support custom portlet modes and custom window states. Therefore, custom portlet modes and custom window states are not shown over WSRP. A portlet that defines custom portlet modes or custom window states can be provided over WSRP and can be accessed in standard portlet modes and standard window states only.Portlet eventing on WebSphere Application Server Liberty Profile:
If you want to use portlet eventing, you must ensure that the event payload classes are shared between applications. For example, the classes can be made available as part of a shared library.