Hi,
I'm stuck wtih a problem where the valueStackFactory is null, and this
causes DWRValidator to fail. I had posted the stacktrace earlier, but didn't
get much responses.
Please confirm some of my assumptions reg the initialization process, so
that i can do some meaningful debugging:
1. Dispatcher.init() has a container.inject(*this*); - which i'm assuming
sets all properties that are annotated with @inject, like :
@Inject
*public* *void* setValueStackFactory(ValueStackFactory fac) {
*this*.valueStackFactory = fac;
}
2. StrutsPrepareFilter calls the Dispatcher.init() right? - how long in the
request lifecycle does the injected objects live? -- ex: i've DWRServlet
that's invoked after both Prepare and Execute filters, but at that point
valueStackFactory is null ; where does it get destroyed , and how will i
ensure that i've a handle to it in the servlet?
3. In a normal action invocation (ie non-DWR), the extraContext
.containsKey(ActionContext.*VALUE_STACK*) is true, while when the same is
invoked via DWR, this entry is not added to context map , while the other
keys like request, session, atttrs etc. are all present. Due to this, the
stack creation is attempted , i.e
stack = valueStackFactory.createValueStack();
and i get the dreaded NPE.
Any inputs on how to set the valuestack or valuestackFactory at the right
point in the flow will solve my problem.
Thanks,
Joseph
