[cdi-dev] JMS 2.1: Proposal to allow any CDI managed bean in a Java EE application to listen for JMS messages

[Romain Manni-Bucau]

2015-08-25 22:53 GMT+02:00 arjan tijms <arjan.tijms at gmail.com>:

> Hi,
>
> On Tue, Aug 25, 2015 at 7:07 PM, Nigel Deakin <nigel.deakin at oracle.com>
> wrote:
> > On 25/08/2015 12:38, arjan tijms wrote:
> > This looks very interesting. Does this work with any normal scope?
>
> Yes, all normal scopes that are available in standard Java EE support
> this as far as I know.
>
>
Events are not mandatory for a normal scope - at least was the case in 1.2
- so JMS can't rely on it for custom normal scopes.


> There's the small caveat that CDI itself doesn't know about this
> automatically for any custom normal scope. That implementation of such
> scope (via a Context) must explicitly throw these events.
>
> For example, this is what Mojarra does for the @FlowScoped implementation:
>
>
> https://github.com/omnifaces/mojarra/blob/master/jsf-ri/src/main/java/com/sun/faces/flow/FlowCDIEventFireHelperImpl.java
>
> Which is fired when the scope starts here:
>
> https://github.com/omnifaces/mojarra/blob/master/jsf-ri/src/main/java/com/sun/faces/flow/FlowCDIContext.java#L431
>
> (the exact same code is used for @ViewScoped in Mojarra as well)
>
>
> > then every time a new request starts, this event is fired which causes an
> > instance of the bean to be created for that request?
>
> Yes, that is what this does ;)
>
> Kind regards,
> Arjan Tijms
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