topic Re: Cannot resolve identifier within the same activity in Alfresco Archive

Cannot resolve identifier within the same activity

rajivmoghe — Tue, 19 Apr 2016 13:45:16 GMT

I have a process that goes as followstart Process (initiator='someuser') –> Step 1 (performed by the initiator) –> Step 2 (performed by initiator's manager). I use a userService to get the requisite values of performer, and account. The xml fragment is shown below: <dataObject id="init

Re: Cannot resolve identifier within the same activity

hari — Tue, 19 Apr 2016 14:07:47 GMT

Does your org.activiti.demo.MyServiceClass class has a variable with name "performer" of type org.activiti.engine.delegate.Expression ?

Re: Cannot resolve identifier within the same activity

rajivmoghe — Tue, 19 Apr 2016 14:59:22 GMT

Yes, it does.


public class MyServiceClass implements JavaDelegate {
 private Expression performer;
 private Expression suac;

 public void execute(DelegateExecution execution) throws Exception {
  String doer = (String) performer.getValue(execution);
  String sua = (String) suac.getValue(execution);  
  System.out.println("Performing Action call in JavaDelegate. No wait for result.");
  System.out.println("Action will be performed for "+doer+", with account "+sua); 
 }
}

Re: Cannot resolve identifier within the same activity

trademak — Wed, 20 Apr 2016 07:08:27 GMT

Hi,

Can you include the full class, including the import statements?

Best regards,

Re: Cannot resolve identifier within the same activity

rajivmoghe — Thu, 21 Apr 2016 17:29:33 GMT

Here is the class:


package org.activiti.demo;

import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.Expression;
import org.activiti.engine.delegate.JavaDelegate;
//import org.springframework.stereotype.Component;

//@Component
public class MyServiceClass implements JavaDelegate {
 private Expression performer;
 private Expression suac;
 
 public void execute(DelegateExecution execution) throws Exception {
  String doer = (String) performer.getValue(execution);
  String sua = (String) suac.getValue(execution);  
  System.out.println("Performing Action call in JavaDelegate. No wait for result.");
  System.out.println("Action will be performed for "+doer+", with account "+sua); 
 }
}

Rajiv

Re: Cannot resolve identifier within the same activity

trademak — Mon, 25 Apr 2016 07:33:11 GMT

Hi,

Looking back at your BPMN XML, I think the issue is this line:

<activiti:expression><![CDATA[${userService.getAccountFor(performer, stream)}]]>

The Activiti Engine isn't able to resolve the performer variable at this point. Where did you set the "performer" variable?

Best regards,

Re: Cannot resolve identifier within the same activity

rajivmoghe — Mon, 25 Apr 2016 07:46:03 GMT

Hi Tijs,

The idea is this - each of the calls to MyServiceClass needs 2 parameters - 1: the performer, and 2: his security user account (suac). I plan to pass both those to the MyService as input variables.
Now the way I approach this is as follows - in absence of anything else, the performer is the initiator. That is set using:

        <activiti:field name="performer">
          <activiti:expression><![CDATA[${initiator}]]></activiti:expression>
        </activiti:field>

With this single field everything works Ok - I can make a call.
Now to add the second variable, the security account for the performer, I use the following:


<activiti:field name="suac">
          <activiti:expression><![CDATA[${userService.getAccountFor(performer, stream)}]]></activiti:expression>
        </activiti:field>

The expectation is that the performer that has been set earlier on, will be used in the getAccountFor method…

Is this a valid expectation? if not, what is the other option, short of having a couple of script tasks to set up the appropriate variables?

Re: Cannot resolve identifier within the same activity

jbarrez — Tue, 26 Apr 2016 12:11:16 GMT

yes it is, but performer and stream needs to be available BEFORE this is called as a process variable.
In your example, you are injecting it into the service task, but not setting it as a process var.