How do I get access to execution variables outside of a service task>

[sirreginald]

I'm new to activiti so apologies if the answer to this is obvious. In a service task I use execution.getVariable().
I need to get execution variables inside a servlet. I tried using:

Execution execution = processEngine.getRuntimeService().createExecutionQuery()
               .processInstanceId(processId)
               .singleResult();

execution.getVariable(propertyId);

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But it says that getVariable isn't a method for execution.

[martin_grofcik]

try to use process instance query with

  /**
   * Include process variables in the process query result
   */
  ProcessInstanceQuery includeProcessVariables();

Regards
Martin