NullPointerException when adding a ProcessEventListener

[d.y.]

Hey there,

I wanted to make a simple example of a process. It works all fine so far but when I try to add the EventListener to the session I get a NullPointerException and I just cant figure out why that is. It seems like the iter.next() object is null instead of an instance of ProcessEventListener (line 143 in ProcessEventSupport.class). But what more to do than adding the ProcessEventListener to the session via ksession.addEventListener(processEventListener) ?

Thank you in advance.

PS: Project attached

[salaboy21]

I'm not sure to understand the problem, but when I open the class called jBPMExplained I notice that you are attaching a null processEventListener that noone instantiate.

Can you elaborate more on the problem that you are having there? I'm pretty sure that if you instantiate the processEventListener (MyProcessEventListener) it will work without any problem.

I notice that you are trying to create some jBPM5 examples, let us know if you want to helps to build the community training! Cheers

http://salaboy.wordpress.com/2011/01/24/announcing-jbpm5-community-training/

[d.y.]

Holy Lord, you are totally right and i was somehow totally blind. Ty! :-)

If I manage to create a good example I'll let you know.^^

[salaboy21]

hehe that usually happens..

I will really appreciate if the community can review the examples hosted here:

https://github.com/Salaboy/Drools_jBPM5-Training-Examples

and here:

https://github.com/esteban-aliverti/JBPM-Samples

We will try to merge both repos at some point but Esteban was focused into show very technical features where my repository was focused to describe more high level scenarios.

Cheers