Multi Instance loop using collection-Cannot resolve identifier 'com'

[Gopan Sugathan]

Hi,

I am trying to model multi instance loop to assign user tasks in parallel using the following example in documentation

<userTask id="miTasks" name="My Task" camunda:assignee="${assignee}">
  <multiInstanceLoopCharacteristics isSequential="true"
     camunda:collection="${myService.resolveUsersForTask()}" camunda:elementVariable="assignee" >
  </multiInstanceLoopCharacteristics>
</userTask>

The bpmn generated looks like this  <bpmn2:userTask id="UserTask_1" camunda:assignee="$assignee" camunda:formKey="embedded:app:forms/approve-loan.html" name="Approve Loan">

      <bpmn2:incoming>SequenceFlow_4</bpmn2:incoming>

      <bpmn2:outgoing>SequenceFlow_3</bpmn2:outgoing>

      <bpmn2:multiInstanceLoopCharacteristics camunda:elementVariable="assignee" camunda:collection="${com.camunda.user.assignment.UserAssignement.getLabTechnicians()}"/>

    </bpmn2:userTask>

When I try to execute this I am getting the following error 

Caused by: org.camunda.bpm.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'com'

at org.camunda.bpm.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)

at org.camunda.bpm.engine.impl.juel.AstProperty.eval(AstProperty.java:52)

at org.camunda.bpm.engine.impl.juel.AstProperty.eval(AstProperty.java:52)

at org.camunda.bpm.engine.impl.juel.AstProperty.eval(AstProperty.java:52)

at org.camunda.bpm.engine.impl.juel.AstProperty.eval(AstProperty.java:52)

at org.camunda.bpm.engine.impl.juel.AstMethod.invoke(AstMethod.java:79)

at org.camunda.bpm.engine.impl.juel.AstMethod.eval(AstMethod.java:75)

at org.camunda.bpm.engine.impl.juel.AstEval.eval(AstEval.java:50)

at org.camunda.bpm.engine.impl.juel.AstNode.getValue(AstNode.java:26)

at org.camunda.bpm.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)

at org.camunda.bpm.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33)

at org.camunda.bpm.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:39)

at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:42)

at org.camunda.bpm.engine.impl.el.JuelExpression.getValue(JuelExpression.java:50)

The java class I have defined looks like this 

public class UserAssignement {

public static Collection<String> getLabTechnicians()  {

List<String> users = new ArrayList<String>();

users.add("john");

users.add("mary");

users.add("peter");

return users;

}

Is there something that I am doing wrong

Kind regards,

Gopan

[hassan....@gmail.com]

Hi Gopan,

You can't resolve a class. You can either resolve a spring bean or a cdi bean
Please review the below expression resolving sections of User Guide

-Resolving spring bean
http://docs.camunda.org/latest/guides/user-guide/#spring-framework-integration-expression-resolving

-Resolving cdi bean
http://docs.camunda.org/latest/guides/user-guide/#cdi-and-java-ee-integration-expression-resolving

or you can assign a process variable of type Collection as below
camunda:collection="assigneeList"

[Gopan Sugathan]

Thank You very much the one with collection worked for me