org.springframework.web.portlet.mvc.Controller |
Known Indirect Subclasses |
Base portlet Controller interface, representing a component that receives
RenderRequest/RenderResponse and ActionRequest/ActionResponse like a
Portlet
but is able to participate in an MVC workflow.
Any implementation of the portlet Controller interface should be a reusable, threadsafe class, capable of handling multiple portlet requests throughout the lifecycle of an application. To be able to configure Controller(s) in an easy way, Controllers are usually JavaBeans.
After the DispatcherPortlet has received a request and has done its work
to resolve locales, themes and suchlike, it tries to resolve a
Controller to handle that request, using a
HandlerMapping
.
When a Controller has been found, the
handleRenderRequest
or handleActionRequest
method will be invoked, which is responsible for handling the actual
request and - if applicable - returning an appropriate ModelAndView.
So actually, these method are the main entrypoint for the
DispatcherPortlet
which delegates requests to controllers.
So basically any direct implementation of the Controller interface just handles RenderRequests/ActionRequests and should return a ModelAndView, to be further used by the DispatcherPortlet. Any additional functionality such as optional validation, form handling, etc should be obtained through extending one of the abstract controller classes mentioned above.
Public Methods | |||||||||||
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Process the action request.
| |||||||||||
Process the render request and return a ModelAndView object which the DispatcherPortlet
will render.
|
Process the action request. There is nothing to return.
request | current portlet action request |
---|---|
response | current portlet action response |
Exception | in case of errors |
---|
Process the render request and return a ModelAndView object which the DispatcherPortlet
will render. A null
return value is not an error: It indicates that this
object completed request processing itself, thus there is no ModelAndView to render.
request | current portlet render request |
---|---|
response | current portlet render response |
Exception | in case of errors |
---|