[wildfly-dev] Injecting ManagedExecutorService results in NPE

[Ingo Weiss]

On 22/03/2016 13:28, Stuart Douglas wrote:
> Where are you trying to use these?
> 
> Stuart
> 
> On Wed, 23 Mar 2016, 00:18 Ingo Weiss <ingo at redhat.com
> <mailto:ingo at redhat.com>> wrote:
> 
>     Hi,
> 
>     I was testing injecting the default ManagedExecutorService on WF10 and
>     it returns a NullPointerException if I don't do a lookup.
> 
>     These result in a NPE:
> 
>     @Resource
>     private ManagedExecutorService executorService;
> 
>     @Resource(lookup = "java:jboss/ee/concurrency/executor/default")
>     private ManagedExecutorService executorService;
> 
>     But this works:
> 
>     private ManagedExecutorService executorService =
>     InitialContext.doLookup("java:jboss/ee/concurrency/executor/default");
> 
>     I didn't change any configurations on WF so far. Ideas?
> 
>     Cheers
>     --
>     Ingo Weiss
> 
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> 

Hi Stuart,

On a simple JAX-RS class. Something along these lines:

@Path("resource")
public class Resource {

    @Resource
    private ManagedExecutorService executorService;

    ... blah blah...

    public String fetchMessage() {
        CompletableFuture.supplyAsync(this::message, executorService).
            thenApply(this::process).
            exceptionally(this::handle).
            thenAccept(this::consume);

        return "* fetchMessage() *";
    }

    String message() {
        return "Super message @ " + System.currentTimeMillis();
    }

    ... blah blah ...
}
-- 
Ingo Weiss

-- 
Ingo Weiss

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