Howto get CamundaProperties from extensions of current UserTask

[Torsten Geise]

Dear all,

I want to get the CamundaProperties defined at a Usertask in the Camunda Modeler when the process instance is waiting at this user task. How to achieve this?

Here's the XML-Snippet:

    <bpmn2:userTask id="UserTask_1" name="Usertask 1">

      <bpmn2:extensionElements>

        <camunda:properties>

          <camunda:property value="erledigen,weiterleiten,erledigenMitFolgetask" name="tl-actions"/>

        </camunda:properties>

      </bpmn2:extensionElements>

      <bpmn2:incoming>SequenceFlow_2</bpmn2:incoming>

      <bpmn2:outgoing>SequenceFlow_4</bpmn2:outgoing>

    </bpmn2:userTask>

I know that I could find all Usertasks by the following snippet, but is there a shorter way operating on the TaskInstance to avoid iterating through all UserTasks?

BpmnModelInstance bpmnModelInstance = repositoryService().getBpmnModelInstance(processDefinition.getId());
List<String> tlActions = new ArrayList<String>();
Collection<UserTask> userTasks = bpmnModelInstance.getModelElementsByType(UserTask.class);
for (UserTask userTask : userTasks) {
    if ("UserTask_1".equals(userTask.getId())) {
        CamundaProperties camundaProperties = userTask.getExtensionElements().getElementsQuery().filterByType(CamundaProperties.class).singleResult();
        for (CamundaProperty camundaProperty : camundaProperties.getCamundaProperties()) {
            if ("tl_actions".equals(camundaProperty.getCamundaName())) {
                for (String s : camundaProperty.getCamundaValue().split(",")) {
                    tlActions.add(s.trim());
                }
            }
        }
    }
}

Thanks,

Torsten

[Sebastian Menski]

Hi Torsten,

you can access the current user task from a task listener [1].

Cheers,
Sebastian

[1] http://docs.camunda.org/7.3/guides/user-guide/#bpmn-model-api-delegation-code-task-listener

[Torsten Geise]

Hi Sebastion,

I need to access the BPMN extension elements before I return the task to a task list in order to send some configuration to the task list. IMHO, a task listener doesn't help at this point.

This shall work in the following context:

- User requests a task list

- Our custom task service performs a task query by utilizing the camunda Java API (TaskQuery)

- For each task load the task variables

- For each task load the camunda properties

- Return custom Task as DTO to the user

Thanks,

Torsten

 

[Sebastian Menski]

Hi Torsten,

if you already queried the tasks you can use the key to get the task directly from the model API.

UserTask userTask = modelInstance.getModelElementById(task.getKey());

Cheers,

Sebastian

[Torsten Geise]

That works.

Thanks,

Torsten