[
https://issues.apache.org/jira/browse/TAP5-2383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14121220#comment-14121220
]
Lance edited comment on TAP5-2383 at 9/4/14 10:31 AM:
------------------------------------------------------
{quote}so you can only get a parent of the component, but you can't get its
children...{quote}
I'm making assumptions here about the actuall implementation. But I was hoping
that as tapestry assembles the page and it's components, the components could
add subscription handlers to the page. Surely the page is in scope as the
components are being assembled?
was (Author: uklance):
{quote}so you can only get a parent of the component, but you can't get its
children...{quote}
I'm making assumptions here about the actuall implementation. But I was hoping
that as tapestry assembles the page and it's components, the components could
add themselves as subscription handlers to the page. Surely the page is in
scope as the components are being assembled?
> Serverside publish / subscribe mechanism
> ----------------------------------------
>
> Key: TAP5-2383
> URL: https://issues.apache.org/jira/browse/TAP5-2383
> Project: Tapestry 5
> Issue Type: New Feature
> Components: tapestry-core
> Reporter: Lance
> Priority: Minor
>
> In some cases, an event in one component should cause an action (eg ajax
> update) in another. When these components are siblings it sometimes gets
> tricky having to pass zone id's around and having one component update the
> other.
> It would be nice to decouple the components with a serverside pub/sub
> mechanism. Here's an initial brain dump on how it could work.
> {code:java}
> public class EditPersonComponent {
> @Parameter
> private Person person;
> @Inject
> private PersonDao personDao;
> @Inject
> private ComponentResources componentResources;
> // lets assume there's a form in the component which gets posted
> void onSuccessFromPersonForm() {
> personDao.save(person);
> componentResources.publish("personUpdated", person); // new method on
> ComponentResources
> }
> }
> {code}
> {code:java}
> public class SomeOtherComponent {
> @Inject
> private AjaxResponseRenderer ajaxResponseRenderer;
> @Property
> private Person person;
> @Inject
> private Zone personZone;
> // new subscribe annotation (and naming convention?)
> @Subscribe("personUpdated")
> void onPersonUpdatedPublished(Person person) {
> this.person = person;
> ajaxResponseRenderer.addRender(personZone);
> }
> }
> {code}
> If this change was made on ComponentResources, we should probably add the
> following to support invoking publish events on the client
> {code}
> Link ComponentResources.createPublishLink(String eventType, Object... context)
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
