topic Re: @Inject Not Working in Delegate - Activiti 5.12.1 in Alfresco Archive

@Inject Not Working in Delegate - Activiti 5.12.1

zoikks1 — Thu, 08 Aug 2013 21:52:34 GMT

I have built a custom service task that defines the task (UI) and then has a delegate associated with it. Inside the delegate, I'd like to inject an EJB using @Inject. When I execute the functionality, the injection never seems to happen. A similar structure for what I have created is hereublic

Re: @Inject Not Working in Delegate - Activiti 5.12.1

trademak — Fri, 09 Aug 2013 12:55:59 GMT

Hi,

If you want to use an EJB in a service task you have to first look it up in the JNDI context.
This injection doesn't work for service tasks.

Best regards,

Re: @Inject Not Working in Delegate - Activiti 5.12.1

zoikks1 — Mon, 12 Aug 2013 15:04:39 GMT

Thanks for the reply.

Fair enough - what is preventing the injection from working?

Re: @Inject Not Working in Delegate - Activiti 5.12.1

frederikherema1 — Wed, 14 Aug 2013 09:37:51 GMT

Delegate instances (if using activiti:class) are instantiated by activity by it's classname, simple as that. So the annotations won't be processed. You can try adding the JavaDelegate instance (initialized and fetched with everything injected) as a "bean" to the process-engine configuration and use activiti:delegateExpression="${theDelegate}"

Re: @Inject Not Working in Delegate - Activiti 5.12.1

yuryshaban — Sat, 11 Jan 2014 11:39:53 GMT

Hello.
Could you please explain me the difference between:
- "This injection doesn't work for service tasks."
- "A custom El-Resolver for resolving Cdi beans (including EJBs) from the process," - from User guide, Section CDI Integration, Chapter 16.

As I understood, CDI works everywhere, but service tasks. Am I right?

Thanks for advance.

Re: @Inject Not Working in Delegate - Activiti 5.12.1

frederikherema1 — Wed, 15 Jan 2014 08:06:54 GMT

When you use activiti:class="org.whatever.MyDelegate", the MyDelegate instance will NOT be aware of CDI-context and injection will not work. Instead, make a CDI-bean of the MyDelegate and register this in the CDI-context (e.g. under the name myDelegate). In a service-task, you can now use the activiti:delegateExpression="${myDelegate}" to use the MyDelegate instance that lives in the CDI-context. This way, injection will work on the bean.

Re: @Inject Not Working in Delegate - Activiti 5.12.1

yuryshaban — Thu, 16 Jan 2014 07:20:46 GMT

Thanks a lot!

Re: @Inject Not Working in Delegate - Activiti 5.12.1

frederikherema1 — Thu, 16 Jan 2014 08:28:00 GMT

I presume it's working that way?

Re: @Inject Not Working in Delegate - Activiti 5.12.1

yuryshaban — Thu, 16 Jan 2014 11:23:31 GMT

I'm trying.
Now, after your answer, I'm sure, that it's possible to reach what I want (I want EJB through CDI in my service task without lookup(…)) and I'll try till success.
May say, you've presented me hope

Re: @Inject Not Working in Delegate - Activiti 5.12.1

yuryshaban — Mon, 27 Jan 2014 16:12:12 GMT

Interim result: in JBoss all work great, but weblogic take a firm stand… (because of an older version of Weld. Seems).
We'll continue.