Get task properties using rest API

[M_Azizi]

Hi. I’m looking for a rest API to get task properties which declared in extensions tab of modeler. Is there?

[aravindhrs]

@M_Azizi Built-in rest api is not there for fetching extension properties. You can expose a rest api by fetching the bpmn model using repository service.

	@Autowired
	private RepositoryService repositoryService;

	public void parseBpmn(String bpmn20XML ) throws IOException {
		Collection<CamundaProperties> camundaProperties = new ArrayList<>();
		BpmnModelInstance bpmnModelInstance = Bpmn.readModelFromStream(repositoryService.getProcessModel("processDefinitionId"));
		Collection<UserTask> userTasks = bpmnModelInstance.getModelElementsByType(UserTask.class);
		userTasks.stream().forEach(userTask -> {
			if (userTask instanceof UserTask) {
				camundaProperties.addAll((Collection<? extends CamundaProperties>) userTask.getExtensionElements().getElementsQuery()
						.filterByType(CamundaProperties.class).singleResult().getCamundaProperties());
			}
		});
	}

You can refer below examples:

How to retrieve process extension properties?

@dirkw65 based on activity type, you can get extension properties from DelegateTask/Delegate Execution or by parsing the whole process definition xml itself. Example to get extension properties from DelegateTask/DelegateExecution: UserTask: UserTaskImpl userTaskImpl = bpmnModelElementInstance.getModelInstance().getModelElementById(modelElementId); ExtensionElements userTaskExtensionElements = userTaskImpl.getExtensionElements(); Collection<CamundaProperty> userTaskProperties = userTaskExtens…

How to attach static data to a BPMN or a CMMN user task?

@Minisha_M you can add static data in the Extension properties like below: [image] In order to access these properties at runtime you need to parse it. From TaskListener you can access it like, ExtensionElements extensionElements =((UserTask) delegateTask.getBpmnModelElementInstance()).getExtensionElements(); Collection<CamundaProperty> properties = extensionElements.getElementsQuery() .filterByType(CamundaProperties.class).singleResult().getCamundaProperties();

Get UserTask propery in java API

We use something like this: String taskId = ...; ProcessEngineServices processEngineServices = ...; Task task = processEngineServices.getTaskService().createTaskQuery().taskId(taskId).singleResult(); String taskDefinitionKey = task.getTaskDefinitionKey(); String processDefinitionId = task.getProcessDefinitionId(); Optional<String> myPropertyValue = processEngineServices .getRepositoryService() .getBpmnModelInstance(processDefinitionId) …

[M_Azizi]

thanks for your response @aravindhrs . I was looking for a rest. not any java code. I did that by declaring input/output parameters. I’m not sure this is a clear solution or not, but It works for my usage.
I get task variables by this API and input/output parameters are included too:

localhost:8080/engine-rest/task/{id}/form-variables

[aravindhrs]

@M_Azizi

I was looking for a rest. not any java code.

Rest api not available at this moment for this feature. Maybe you can raise a feature request in the camunda portal