meyerdan

assertThat(processInstance).isStarted()
.task().hasDefinitionKey("approveInvoice")
    .hasCandidateGroup("backoffice")
    .isNotAssigned();

meyerdan

// make sure process instance is started
assertNotNull(runtimeService.createProcessInstanceQuery()
    .processInstanceId(processInstance.getId())
    .singleResult());

// make sure the task with id "approveInvoice" & candidate group "backoffice" exists
Task task = taskService.createTaskQuery()
  .taskCandidateGroup("backoffice")
  .processInstanceId(processInstance.getId())
  .taskDefinitionKey("approveInvoice")

meyerdan

// who worked on this task?
historyService.createUserOperationLogQuery()
  .taskId("someTaskId")
  .list();

// all operations performed by a given user
historyService.createUserOperationLogQuery()
  .userId("jonny")  
  .list();

meyerdan

public class ExampleServiceTask implements JavaDelegate {

  public void execute(DelegateExecution execution) throws Exception {
    BpmnModelInstance modelInstance = execution.getBpmnModelInstance();
    ServiceTask serviceTask = (ServiceTask) execution.getBpmnModelElementInstance();

    // read properties from model:
    serviceTask.getIoSpecification();
    //... 
  }

meyerdan

// get the BpmnModelInstance for a deployed process
BpmnModelInstance processModel = runtimeService.getBpmnModelInstance("someProcessDefinitionId");

// find all  User Tasks
ModelElementType taskType = processModel.getModel().getType(UserTask.class);
Collection<ModelElementInstance> taskInstances = modelInstance.getModelElementsByType(taskType);

// Iterate the tasks ...

meyerdan

BpmnModelInstance modelInstance = Bpmn.createProcess()
    .name("Example process")
    .executable()
  .startEvent()
  .userTask()
    .name("Some work to do")
  .endEvent()
.done();

meyerdan

public class DummySerializable implements Serializable {

  private static final long serialVersionUID = 1L;

}