[weld-dev] @ThreadScoped for Weld SE

[Peter Royle]

On Thu, 2009-12-10 at 20:01 -0500, Dan Allen wrote:
> That's a cool idea. It more or less brings ThreadLocal in line with
> the CDI scoping mechanism, correct?

yep

> I would think this would be useful even in Java EE because you could
> use it for async threads, I suppose. A specific usage scenario isn't
> coming to me at the moment.
> 
> -Dan
> 
> On Thu, Dec 10, 2009 at 7:45 PM, Peter Royle
> <howardmoon at screamingcoder.com> wrote:
>         Hi,
>         
>         I've implemented ThreadContext and @ThreadScoped (revision
>         5267) for Weld SE.
>         
>         Quick example:
>         
>         ---
>         public class DateFormatterProducer {
>         
>           /** Produces a thread-safe date formatter (one instance per
>         thread).    */
>           @Produces @ThreadScoped
>           public SimpleDateFormat dateFormat()  {
>              return new SimpleDateFormat("yyyyMMdd HHmm");
>           }
>         }
>         ---
>         public class ThreadThing implements Runnable {
>           @Inject SimpleDateFormat dateFormat;
>           public void run() {
>                ...
>                dateFormat.format(date);
>                ...
>           }
>         }
>         ---
>         public class MainClass {
>         
>           public void main(@Observes ContainerInitialized,
>         Instance<ThreadThing> threadThing, WeldContainer weld) {
>              Thread thread1 = new Thread(threadThing.select().get());
>              thread1.start();
>         
>              Thread thread2 = new Thread(threadThing.select().get());
>              thread2.start();
>         
>              thread1.join();
>              thread2.join();
>         
>              weld.shutdown();
>           }
>         
>         }
>         --- requires this decorator to be enabled ---
>         <beans>
>           <decorators>
>         
>          <decorator>org.jboss.weld.environment.se.threading.RunnableDecorator</decorator>
>           </decorator>
>         </beans>
>         
>         Anyone please let me know how you think this could be
>         improved.
>         
>         Thanks,
>         
>         Pete R.
>         
>         
>         
>         _______________________________________________
>         weld-dev mailing list
>         weld-dev at lists.jboss.org
>         https://lists.jboss.org/mailman/listinfo/weld-dev
> 
> 
> 
> -- 
> Dan Allen
> Senior Software Engineer, Red Hat | Author of Seam in Action
> Registered Linux User #231597
> 
> http://mojavelinux.com
> http://mojavelinux.com/seaminaction
> http://www.google.com/profiles/dan.j.allen