[concurrency-interest] curious if there is a Local.java in the works for CompletableFutures like scala has

Josh Humphries jhump at bluegosling.com
Mon May 22 16:01:41 EDT 2017


Pavel,
It sounds like you want something like this
<https://github.com/jhump/bluegosling/blob/master/src/com/bluegosling/concurrent/executors/ContextPropagatingExecutor.java>
and this
<https://github.com/jhump/bluegosling/blob/master/src/com/bluegosling/concurrent/executors/ContextPropagator.java#L124>,
and specify the former as the Executor parameter to the CompletionStage
chaining methods. Java 9 adds new overridable methods to CompletableFuture
so that you could sub-class it and override defaultExecutor(), so the
context is always correctly propagated for your sub-classed kind of future.

----
*Josh Humphries*
jhump at bluegosling.com

On Mon, May 22, 2017 at 3:44 PM, Martin Buchholz <martinrb at google.com>
wrote:

> There's not likely to be any support for local context anywhere in
> java.util.concurrent, but it seems not too hard to roll your own support
> with a custom executor to be used with CompletableFuture that kept track of
> any local context.
>
> On Fri, May 19, 2017 at 1:16 PM, Pavel Rappo <pavel.rappo at oracle.com>
> wrote:
>
>> General questions on concurrency in Java should be asked here:
>>
>>    http://altair.cs.oswego.edu/mailman/listinfo/concurrency-interest
>>
>> > On 18 May 2017, at 21:57, Dean Hiller <dhiller at twitter.com> wrote:
>> >
>> > Way more detail here...
>> >
>> > http://stackoverflow.com/questions/37933713/does-completable
>> future-have-a-corresponding-local-context
>> >
>> > So I was wondering if this was going to be added at some point to the
>> jdk
>> > as I could not figure out how to set something so it was still
>> available on
>> > the thread at a later time when traversing async thenCompose,
>> thenAccept.
>> >
>> > thanks,
>> > Dean
>>
>>
>
> _______________________________________________
> Concurrency-interest mailing list
> Concurrency-interest at cs.oswego.edu
> http://cs.oswego.edu/mailman/listinfo/concurrency-interest
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://cs.oswego.edu/pipermail/concurrency-interest/attachments/20170522/c9242112/attachment.html>


More information about the Concurrency-interest mailing list