I have an issue in which a 3rd party control is attempting to access a bean
property of a conversation state bean during the decode phase. This property
returns null (which the 3rd party control hates) when there is no conversation.
So I thought that I would add a custom method interceptor on the get property
method to check if the conversation is active and if not, immediately invoke
the navigation handler (unlike the @Conversational which doesn't change the
navigation for non-action methods).
After developing it, it almost looks like Seam 1.0.1 doesn't support custom
method-level interceptors on POJOs. Is this true?
Here is my code:
Bean class:
@Name("editReportBean")
| @Scope(ScopeType.CONVERSATION)
| public class EditReportBean
| {
| ...
| @ConversationRequired(ifNotBegunOutcome="return.report.list")
| public TreeModel getAvailTreeModel()
| {
| return this.availTreeModel;
| }
Interceptor:
@Target({TYPE, METHOD})
| @Retention(RUNTIME)
| @Interceptors(ConversationRequiredInterceptor.class)
| public @interface ConversationRequired
| {
| /**
| * The JSF outcome if the component is invoked outside
| * of the scope of its conversation
| */
| String ifNotBegunOutcome();
| }
The interceptor implementation:
@Around({BijectionInterceptor.class,
| ValidationInterceptor.class,
| ConversationInterceptor.class})
| @Within({RemoveInterceptor.class})
| public class ConversationRequiredInterceptor
| {
| @AroundInvoke
| public Object ensureActiveConversation(InvocationContext invocation)
| throws Exception
| {
| Method method = invocation.getMethod();
|
| if (!Manager.instance().isLongRunningConversation())
| {
| String outcome =
method.getAnnotation(ConversationRequired.class).ifNotBegunOutcome();
| FacesContext context = FacesContext.getCurrentInstance();
|
context.getApplication().getNavigationHandler().handleNavigation(context,
| null, outcome);
| throw new AbortProcessingException();
| }
|
| return invocation.proceed();
| }
| }
The "ensureActiveConversation" method of the interceptor implementation class
is never invoked.
Is this possible? What else can I do to stop this (I will probably put a work
around in, but would like to know if I can get custom interceptors to work on
POJO methods).
Thanks,
ANdrew
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