users@javaee-spec.java.net

[javaee-spec users] Re: [jsr342-experts] Re: meet-up at JavaOne

From: arjan tijms <arjan.tijms_at_gmail.com>
Date: Wed, 25 Sep 2013 23:43:20 +0200

Hi,

On Tue, Sep 24, 2013 at 11:46 PM, Yoon Kyung Koo
<kyungkoo_yoon_at_tmax.co.kr>wrote:

>
> 1. CDI and EJB
> In the long term, the whole EJB features can be replaced by CDI.
> Currently, only the distributed (or remote) object model cannot be
> replaced by CDI.
> I think if Clustered or Distributed CDI bean is possible and can be
> standardized, then the old EJB model can be removed.
>

In this light it's maybe interesting to note that the spec lead Bill
Shannon has suggested moving away from the binary remote object model, and
exclusively using REST (JAX-RS) and SOAP (JAX-WS) instead. See
https://java.net/jira/browse/JAVAEE_SPEC-16

As I mentioned in that JIRA issue, I'd personally rather see a native high
performance and convenient/transparent distributed object model for Java to
Java solutions, and then have JAX-RS as an option for interoperability
between Java and non-Java solutions, or between less tightly coupled Java
solutions.

Upgrading the remoting support of EJB is not worth it at this point
anymore, but I agree with Yoon that moving the component model to CDI
offers new opportunities to standardize a modern (native) interoperability
facility.



> 4. lambda support
> I didn't think much about the lambda support of Java EE 8 platform, but it
> would be a great challenge.
>

It would be a challenge indeed, but there are several opportunities
throughout the platform.

In JSF for example it would be ideal for several of the tree visiting APIs
or for running a (small) amount of code within its own scope. In OmniFaces
for example we have a utility method that would be perfectly suited for
lambdas that does exactly that (see
https://code.google.com/p/omnifaces/source/browse/src/org/omnifaces/el/ScopedRunner.java#60
).

For event handling they would be great as well. In OmniFaces again we're
already using a lambda like construct for that, see e.g.
https://code.google.com/p/omnifaces/source/browse/src/org/omnifaces/util/Events.java#95


We're using this as follows now:

Events.addBeforePhaseListener(PROCESS_VALIDATIONS, new Callback.Void() {

@Override
public void invoke() {
if (Components.hasInvokedSubmit(parent)) {
Faces.setContextAttribute(IgnoreValidationFailed.class.getName(), true);
}
}
});

(see
https://code.google.com/p/omnifaces/source/browse/src/org/omnifaces/taghandler/IgnoreValidationFailed.java#92
)

Such code will look much better when using lambdas. I think I would be
great to have such API taking lambdas readily available in Java EE.

Kind regards,
Arjan Tijms






>
> Have a great time, everyone.
>
> Regards,
> Yoon Kyung Koo (TmaxSoft)
>
> --
> --------------------
> Software Innovation Driver
> Researcher & Executive Director / WAS Lab / TmaxSoft R&D Center
> PGP http://www.javadom.com/personal/yoonforhatgmaildotcom.asc
>
>
>
>
>
> 2013. 9. 11., 4:30, Linda DeMichiel <linda.demichiel_at_oracle.com> ۼ:
>
>
> Greetings,
>
> As requested, we've reserved a spot where we can meet up
> at JavaOne to talk about ideas for Java EE 8.
>
> We've reserved the Lombard room in Parc 55 on Wednesday Sept 25
> for a 2:30-4:30 meeting.
>
> While we're not limiting attendance to Expert Group members, the room
> itself is of limited size, so please let us know if you are planning
> to attend.
>
> We're expecting that the first item for the meeting will be to
> converge on the meeting agenda. As another item (possibly to get the
> ball rolling), we'd like to suggest that we discuss the wish-lists
> that were posted to the group earlier, namely:
>
> http://arjan-tijms.blogspot.de/2013/07/java-ee-8-wish-list.html
> and
> http://antoniogoncalves.org/2013/07/18/java-ee-8-whislist/
>
> thanks,
>
> -Linda
>
>
>