I've a component with session scope, i.e.:
@Scope(ScopeType.SESSION)
| @Name("myComponent")
| public class MyComponent {
| ...
| }
|
An this other component, with a remote method and a dependency to the above
component:
@Name("someAction")
| public class MyAction {
|
|
| @WebRemote
| public void doSomethingWithMyComponent() {
| ...
| myComponent.doSomething();
| ..
| }
|
| @In(required = false)
| MyComponent myComponent;
|
| ...
| }
|
|
The above is used as follows (remember I'm developing a portlet):
1. At some point in the application flow, "myComponent" is instantiated (and
put in session context).
2. Some page does an ajax request to MyAction.doSomethingWithMyComponent()
through seam remoting.
3. well.... doesn't matter.
The fail comes at step 2, there a NPE is thrown, and the cause is myComponent
is not injected! Well, really it is injected, but there happens to be no
"myComponent" in session scope, so the component created in step 1 is not the
one injected (I get a null due to @In(required = false)).
I've found that web remote seam components are invoked through the same url
used for static resources (in JSR-168 perspective), which is correct, because
neither a render url nor an action url would work alright since the portlet
response (ajax requests's xml response) would be composed with other portlets'
markup.
(now I think, the encodeUrl method shouldn't be used to build the ajax request
url?)
The problem, I think, is that resource URLs are outside the portlet context,
therefore the Portlet Session context is not available. Instead, what we've got
is the HttpSession.
The component named "myComponent" can not be found in the HttpSession.
As JSR-168 states (PLT.15.4), the Portlet Session stores attributes in the
HttpSession, but prefixed, that's why seam can't find it.
are there any plans to provide better support for remoting in a portal?
There seems to be two possibilities:
1. Wait for jboss portal ajax requests support, and integrate seam with it. See
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=90035&postdays=0&postorder=asc&start=20
2. Manage to recover the components when stored in prefixed HttpSession
attributes. (through PortletSessionUtil). In this case, something should tell
seam that the component was stored in X Portlet Session.
Thank you.
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