Sorry, but I've read the solution below 10 times now and it hurts my head every
time! :-) I don't see how it gets around the problem that when E is
AJAX-submitted, the server-side elements can find ways to prod L to refresh but
they cannot tell L the current value of F. The server-side doesn't know the
current value of F, unless we make the server-side stateful (no thank you), or
we somehow include the value of F in every request.
What I'm aiming for is a solution which works declaratively. You know, where
you don't see the plumbing. Just like @ActivationRequestParameter, but at the
component level.
On 21/03/2014, at 2:35 AM, Lance Java wrote:
> I'm imagining the pub sub would work like...
>
> public class L {
> @Inject
> private Publisher publisher;
>
> @Inject
> private Block someBlock;
>
> /**
> * Fired when the select menu changes
> */
> public Object onFilterChange(Entity entity) {
> publisher.publish("changeEntity", entity);
> return someBlock;
> }
> }
>
> public class E {
> @Inject
> private AjaxResponseRenderer ajaxResponseRenderer;
>
> @Inject
> private Zone someZone;
>
> @Property
> private Entity entity;
>
> @Subscribe(topic="changeEntity")
> void subscribeChangeEntity(Entity entity) {
> this.entity = entity;
> ajaxResponseRenderer.addRender(someZone;
> }
> }
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