<p dir="ltr">No, fireAsync is still needed for all the reason we mzntionned - strongest one being the fact we need a return type and cant change fire - but using the return type we have the double activation without introducing a new API. Said otherwise API stays natural on both sides which was my main fear with a fireAsync and an @ObservesAsync (or any other new api we talked about). And we have the bonus to be aligned on SE async which sounds quite interesting for the future.</p>
<div class="gmail_quote">Le 1 avr. 2015 08:48, "Jozef Hartinger" <<a href="mailto:jharting@redhat.com">jharting@redhat.com</a>> a écrit :<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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So instead of calling observers asynchronously you suggest turning
observers into producers of CompletableFuture that will then be
completed asynchronously?<br>
<br>
<div>On 03/31/2015 06:21 PM, Romain
Manni-Bucau wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">// fire side
<div>event.fireAsync(new LetTheWorldKnow()).thenRun(() ->
System.out.println("We did it!"));</div>
<div><br>
</div>
<div>// observer side</div>
<div>CompletableFuture iWantToKnow(@Observes LetTheWorldKnow
event) {}</div>
<div><br>
</div>
<div>// impl behavior would be like
CompletableFuture.allOf(allObserverReturnedInstances) to be
aligned on CompletableFuture behavior I think</div>
<div><br>
</div>
<div>Am I clearer?</div>
<div><br>
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<span style="font-size:small">Romain
Manni-Bucau</span><br>
<a href="https://twitter.com/rmannibucau" target="_blank">@rmannibucau</a> | <a href="http://rmannibucau.wordpress.com" target="_blank">Blog</a> | <a href="https://github.com/rmannibucau" target="_blank">Github</a> | <a href="https://www.linkedin.com/in/rmannibucau" target="_blank">LinkedIn</a> | <a href="http://www.tomitribe.com" target="_blank">Tomitriber</a></div>
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<div class="gmail_quote">2015-03-31 18:15 GMT+02:00 Sven
Linstaedt <span dir="ltr"><<a href="mailto:sven.linstaedt@gmail.com" target="_blank">sven.linstaedt@gmail.com</a>></span>:<br>
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<div>Hi Romain,</div>
<div><br>
</div>
I am not sure, I have fully understand how an observer
with <span style="font-size:12.8000001907349px">CompletableFuture could
look like. Could you give us an example? </span>
<div><span style="font-size:12.8000001907349px"><br>
</span></div>
<div><span style="font-size:12.8000001907349px">Afair </span><span style="font-size:12.8000001907349px">CompletableFuture</span><span style="font-size:12.8000001907349px"> was considered
to be used in the "trigger" side in order to track
async event invocation completion.</span></div>
<div><span style="font-size:12.8000001907349px"><br>
</span></div>
<div><span style="font-size:12.8000001907349px">br, Sven</span></div>
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<div>2015-03-31 18:00 GMT+02:00 Romain
Manni-Bucau <span dir="ltr"><<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>></span>:<br>
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<div dir="ltr">Hi guys,
<div><br>
</div>
<div>on async topic if I followed we are at the
point where we are looking for an activation
on the observer side.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>This is quite interesting for few reasons:</div>
<div>1- we have our double activation</div>
<div>2- API is user friendly (observer is async
and has an async signature)</div>
<div>3- open door for future async enhancements
(hopefully not in CDI) with composition of
these observers</div>
<div><br>
</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div><br>
</div>
<div>wdyt?</div>
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<span style="font-size:small">Romain
Manni-Bucau</span><br>
<a href="https://twitter.com/rmannibucau" target="_blank">@rmannibucau</a>
| <a href="http://rmannibucau.wordpress.com" target="_blank">Blog</a> | <a href="https://github.com/rmannibucau" target="_blank">Github</a> | <a href="https://www.linkedin.com/in/rmannibucau" target="_blank">LinkedIn</a> |
<a href="http://www.tomitribe.com" target="_blank">Tomitriber</a></div>
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