topic Re: Activiti-OSGi dynamically add ActivityBehavior in Alfresco Archive

Activiti-OSGi dynamically add ActivityBehavior

ronnybr — Thu, 17 Oct 2013 14:23:03 GMT

Hello,I have a process which uses its own ActivityBehaviour in an OSGi-environment.When I deployed the process definition I discovered that there is no way to add custom behaviors in an OSGi/Blueprint-like way.Right now I solved the problem by extending the BlueprintELResolver (as you can see here).

Re: Activiti-OSGi dynamically add ActivityBehavior

jbarrez — Mon, 21 Oct 2013 10:58:34 GMT

Indeed it would be valuable.

What would be the 'blueprint' way to fix this? We've got some custom classloading utils already in there that fix most osgi problems we had.

Re: Activiti-OSGi dynamically add ActivityBehavior

ronnybr — Mon, 21 Oct 2013 14:01:56 GMT

Well, I am no blueprint expert, that's why I would take the same approach you took with dynamically adding the JavaDelegates.
A pair of bind/unbind methods and declare the ELResolver as listener like this in a context.xml:
<code>
<reference-list id="activityBehaviours" availability="optional"
                interface="org.activiti.engine.impl.pvm.delegate.ActivityBehavior"
                activation="eager">
                <reference-listener ref="blueprintELResolver"
                        bind-method="bindBehaviour" unbind-method="unbindBehaviour" />
        </reference-list>
</code>
Adding a new behaviours would result in exposing them as a service via another context.xml.