Hi Romain,

I am not sure, I have fully understand how an observer with CompletableFuture could look like. Could you give us an example? 

Afair CompletableFuture was considered to be used in the "trigger" side in order to track async event invocation completion.

br, Sven

2015-03-31 18:00 GMT+02:00 Romain Manni-Bucau <rmannibucau@gmail.com>:
Hi guys,

on async topic if I followed we are at the point where we are looking for an activation on the observer side.

Since Java 8 has now CompletableFuture it would be great to use it. Today the spec doesnt use observer returned values so it is mainly a bad practise to have one even if not strictly forbidden - BTW never saw it in real applications - plus spec is not compatible - not specified at all - with CompletableFuture since it is a new API so we can use it as a marker.

This is quite interesting for few reasons:
1- we have our double activation
2- API is user friendly (observer is async and has an async signature)
3- open door for future async enhancements (hopefully not in CDI) with composition of these observers


Only point I'm not sure is should these observers support sync events. I don't see anything blocking to do it but can have missed something.


wdyt?


Romain Manni-Bucau
@rmannibucau |  Blog | Github | LinkedIn | Tomitriber

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