[jira] [Commented] (TAP5-2383) Serverside publish / subscribe mechanism

["Dmitry Gusev (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAP5-2383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14121088#comment-14121088 ] 

Dmitry Gusev commented on TAP5-2383:
------------------------------------

I like the idea of @Subscribe, but I'd better put it on class level & (optionally) used existing @OnEvent on event handler methods to match published events if the name of method differs from event name.

> 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;
>    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}



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