EJB Async

[paul.setzermann]

Hi,

I tried the EJB Asynchronous annotation but it is not working!

I thought 7.0.2 is supporting it.

Maybe I am missing something!?

Could someone give me a short example?

[wolfc]

https://github.com/jbossas/jboss-as/tree/7.0.2.Final/testsuite/integration/src/test/java/org/jboss/as/testsuite/integration/ejb/async/

Can you be a bit more precise how it is not working for you?

Do you get an exception?

Is the invocation synchronous? If so, how did you verify?

[paul.setzermann]

The method is invoked synchronously.

When I check the a4j:log it´s always waiting for the asynch method to complete.

My code looks like this:

...
 <a4j:commandButton action="#{updateAdbBean.update()}" value="Start" execute="@form" />
...


@ManagedBean
@SessionScoped
public class UpdateAdbBean implements Serializable {

          private static final long serialVersionUID = 2778548975359198879L;
  ...

          public void update() {

               ...

                              FillOrUpdateAdbManager fillOrUpdateAdbManager = lookup(FillOrUpdateAdbManager.class);
                              System.out.println("BEFORE");
                              fillOrUpdateAdbManager.fillOrUpdate(true, updateAdbView.getSource(), adbSpecies, progressBean);
                              System.out.println("AFTER!!!");
                ...
          }
}


@Stateless
@Asynchronous
public class FillOrUpdateAdbManager {

  @Asynchronous
          public void fillOrUpdate(boolean bUpdate, String source, ADBSpecies species, ProgressBean progressBean) {

                    try {
                              TimeUnit.SECONDS.sleep(10);
                    } catch (InterruptedException e) {
                              e.printStackTrace();
                    }

          }

}

Thanks and Cheers,

Paul

[jadtn]

Hi

I ve same problem

The code is synchronous, not asynchronous

@Singleton

@Asynchronous

public class AsyncBean {

    @Asynchronous 

    public void ignoreResult(int a, int b) {

              System.out.println("slepp...");

              try {

                              Thread.sleep(5000);

                    } catch (InterruptedException e) {

                              // TODO Auto-generated catch block

                              e.printStackTrace();

                    }

              System.out.println("fin sleep");

        // the client doesn't care what happens here

    }

}

[morphy]

jboss 7.0.2 supports only ejb 3.1 light which do not have the asynch call as you can see here http://www.theserverside.com/news/1321142/Part-Three-New-Features-in-EJB-31 (look at the table... Table 1: EJB and EJB Lite Feature Comparison)

look also here

https://docs.jboss.org/author/display/AS7/Getting+Started+Guide

where you can find the profile's stack both for specs and for jb 7.0.x

bye

[paul.setzermann]

Hey Riccardo,

Thanks for your help, but why is this stated in the release information?

ANKÜNDIGUNG: AS 7.0.2.Final "Arc" released!

• Details verbergen

A month after 7.0.1.Final was released, we now have  7.0.2! The binary downloads are available here. 7.0.2 "Arc" is mainly a bug fix release but also brings some new features and improvments:

• JSF 2.1
• Async EJB support!!
• Resurrected -b option for command line binding
• SSO support
• JNDI memory footprint improvement
• Limited support for Hibernate 3.3

Cheers,

Paul

[wolfc]

Can you add some println statements to both UpdateAdbBean.update and FillOrUpdateAdbManager.fillOrUpdate?

Specifically: System.err.println(Thread.currentThread());

also add: new Exception("here").printStackTrace(); to fillOrUpdate.

It should show two different threads and a trace which is running in the asynchronous executor service.

[morphy]

maybe a documental bug or in the RN or in the user guide... it's hard to think a bug in the specifications... they are specifications and they say no async call for ejb light...

with the distribution you should have the *-preview.xml which is the full jee stack (as far as i've understood), so we can assume a bug in the user guide (no ejb light in the full stack but full ejb)

so try with that standalone/domain configuration

and share

bye

[morphy]

@Carlo

Hi, are you telling us that the jboss implementation of ejb light supports async calls?

[wolfc]

No, good catch.

The default configuration is only lite enabled:

<subsystem xmlns="urn:jboss:domain:ejb3:1.1" lite="true">

Which in turn does not have async support.

Try:

$ ./standalone.sh --server-config standalone-preview.xml

[jaikiran]

The announcement in this forum has now been edited to make it a bit more clear that the async EJB support is available in the standalone-preview configuration of "everything" distribution.