title: Activiti / Flowable: Get all running instances of process
body: <p>We have created a workflow using activiti bpm modeler application(using function call <code>runtimeService.startProcessInstanceByKey("sampleProcess")</code></p>
  
  <p>Let us say N number of time this function has been called.</p>
  
  <p>What is the method for getting all currently running instances(N) for above model?</p>
  
  <p>Also, what is the table name in the database where this can be checked - for getting currently running instances?</p>