topic Re: Call Activity - Expression - How to in Alfresco Archive

Call Activity - Expression - How to

ginxo — Thu, 14 Apr 2016 09:48:57 GMT

Hello people,I have a question about how to solve this situation I have in my hands. The thing is, I´m trying to define a custom process in order to repeat an specific functionality but with a dynamic expression specified by the "father" process. Let's call the custom process as "B" and the process

Re: Call Activity - Expression - How to

ginxo — Thu, 14 Apr 2016 15:00:52 GMT

I have posted the question in http://stackoverflow.com/questions/36626935/call-activity-expression-how-to as well

Re: Call Activity - Expression - How to

martin_grofcik — Mon, 18 Apr 2016 13:53:58 GMT

Hi,
check org.activiti.engine.test.bpmn.callactivity.CallActivityAdvancedTest#testCallSimpleSubProcessWithExpressions
In activiti source
Regards
Martin

Re: Call Activity - Expression - How to

ginxo — Mon, 18 Apr 2016 15:06:00 GMT

Thanks a lot Martin, but this is not exactly what I mean. I need to pass through the expression to be executed inside the subflow.
Cheers,
Kike.

Re: Call Activity - Expression - How to

martin_grofcik — Tue, 19 Apr 2016 06:42:24 GMT

Hi Kike,

I need to pass through the expression to be executed inside the subflow

In that case I would pass it to the called subprocess as a string variable. In the subprocess (service or script) task, get expression manager from the org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl#getExpressionManager. Expression manager can create expression
org.activiti.engine.impl.el.ExpressionManager#createExpression(String expression). Expression can be evaluated in the context of e.g. execution org.activiti.engine.impl.el.ExpressionManager#createExpression.

Regards
Martin

Re: Call Activity - Expression - How to

ginxo — Tue, 19 Apr 2016 06:52:44 GMT

NICE! that's exactly what I need, let me try it and I'll confirm if your suggestion is solving my problem or not.

Thanks again Mark.
Kike.

Re: Call Activity - Expression - How to

ginxo — Tue, 19 Apr 2016 15:45:56 GMT

Mark,

Finally I tried it and it´s working perfectly…

This is the code of the service
<code>
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.impl.context.Context;
import org.springframework.stereotype.Component;

@Component("customService")
public class CustomService {

public void executeExpression(String expression, DelegateExecution execution) {
Context.getProcessEngineConfiguration().getExpressionManager()
.createExpression(expression).getValue(execution);
}
}
</code>

And this is the one from the service task
<blockcode>
<serviceTask id="customServiceTask_execution" name="Custom Service Task" activiti:expression="${customService.executeExpression("${accountService.getAccount(execution)}", execution)}"></serviceTask>
</blockcode>

Instead of specifying "${accountService.getAccount(execution)}" directly as a method parameter I use a variable passed from the parent process.

Thanks a lot for your helping.
Kike.

Re: Call Activity - Expression - How to

martin_grofcik — Wed, 20 Apr 2016 06:24:28 GMT

Hi Kike,

Glad to hear. 🙂

Martin