[cdi-dev] async: back to completion future?

Reza Rahman reza_rahman at lycos.com
Sun Mar 6 12:51:36 EST 2016


Personally I think this is overdue for standardization, it's just that it's a rather strange API choice I'd like to at least understand a bit better. What was the thinking behind this?

> On Mar 6, 2016, at 12:24 PM, Romain Manni-Bucau <rmannibucau at gmail.com> wrote:
> 
> 
> 2016-03-06 18:02 GMT+01:00 John D. Ament <john.d.ament at gmail.com>:
>> What I think would be even better is to see this implemented in the impls (Weld & OWB) and see how users use it, in a release that's not plastered with Alpha or Experimental all over it.  While I think we were all wary about it, we need real end user input from the impl standpoint to figure out what makes sense to standardize on.
>> 
> 
> Or just do the opposite and *standardize* it. We can use Rx* feedbacks but it doesnt' match event case at all which is a real small subset of the reactive programming so I guess easiness should be what drives us there and integration at least with the JVM so CFuture version sounds more natural than CStage one. Difference is very small at method level but at utility level it is.
> 
> Side note: a Weld or OWB release without experimental/alpha sounds worse if the spec changes later. A compromise can be an extension doing it already you can drop in any of these containers.
>  
>> John
>> 
>> 
>>> On Sun, Mar 6, 2016 at 10:37 AM Reza Rahman <reza_rahman at lycos.com> wrote:
>>> How much end user feedback has there been on this? I have to be honest that it surprises me to find this out now.
>>> 
>>> This to me stands out as an obvious usability problem. CompletableFuture is the obvious top level end user API, not CompletionStage. Not going with CompletableFuture is very likely to confuse most people. The last thing we need is more potential usability problems in Java EE APIs.
>>> 
>>>> On Mar 6, 2016, at 9:39 AM, Romain Manni-Bucau <rmannibucau at gmail.com> wrote:
>>>> 
>>>> Hi guys,
>>>> 
>>>> as a user having a ComlpetionStage makes me loose some JDK utilities, can we move back to CompletionFuture?
>>>> 
>>>> It would allow for instance:
>>>> 
>>>> // doesn't work with CompletionStage
>>>> CompletionFuture.allOf(event1.fireAsync(...), event2.fireAsync(...))
>>>>       .then(...)
>>>> 
>>>> Romain Manni-Bucau
>>>> @rmannibucau |  Blog | Github | LinkedIn | Tomitriber
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