在camunda-spring集成上，任务定义为主动任务无效

Question

我在应用程序中将Camunda引擎与Spring集成在一起。我想找到为运行过程实例分配给每个活动任务的属性。我可以通过以下代码获得任务实例

List<Task> tasks = this.taskService.createTaskQuery().processInstanceId("12").list() 

但是，如果我将任务对象施加到TaskEntity中，然后使用getTaskDefinition()，我会得到null。获取任务详细信息的其他方法是通过ProcessDefinitionEntity.getTaskDefinitions()，但也返回null。

我应该如何获得任务详细信息？

Answer 1

用于阅读属性和文档属性使用BPMN模型API。

此示例使用elementID读取两者。

String processDefinitionId = repositoryService.createProcessDefinitionQuery()
.processDefinitionKey(DEFINITON_KEY).singleResult().getId();
BpmnModelInstance bpmnModelInstance = repositoryService.getBpmnModelInstance(processDefinitionId);
ServiceTask serviceTask = (ServiceTask) bpmnModelInstance.getModelElementById(ELEMENT_ID);
// Documentation, is a collection, but the modeler supports only one attribute
Collection<Documentation> documentations = serviceTask.getDocumentations();
// Properties
Collection<Property> properties = serviceTask.getProperties();

Answer 2

上面的答案给了我一个提示，但没有完全解决问题，因此这是我的代码，它有目的。我在.bpmn文件中的USERTASK看起来像：

 <bpmn:userTask id="Task_063x95d" name="Tech Task">
  <bpmn:documentation>SUCCESS,FAIL</bpmn:documentation>
  <bpmn:extensionElements>
    <camunda:inputOutput>
      <camunda:inputParameter name="language">Java</camunda:inputParameter>
      <camunda:outputParameter name="Platform">Linux</camunda:outputParameter>
    </camunda:inputOutput>
    <camunda:properties>
      <camunda:property name="user" value="Test_User" />
    </camunda:properties>
  </bpmn:extensionElements>
  <bpmn:incoming>SequenceFlow_1xjoyjq</bpmn:incoming>
  <bpmn:outgoing>SequenceFlow_028pkxo</bpmn:outgoing>
</bpmn:userTask>

我已经分析了.bpmn文件，然后在以下代码的帮助下渲染了元素

 // Active tasks for currently running instanceId(input to below code)
 List<Task> tasks = this.taskService.createTaskQuery().processInstanceId(instanceId).list();
 String documentation= null;
for (Task task : tasks)
{
//This gives [documentation][1] field.
documentation = task.getDescription();
UserTaskImpl modelElementById = (UserTaskImpl) bpmnModelInstance.getModelElementById(tasks.get(0)
    .getTaskDefinitionKey());
ExtensionElements childElementsByType2 = modelElementById.getExtensionElements();
Collection<ModelElementInstance> elements = childElementsByType2.getElements();
for (ModelElementInstance elem : elements)
{
    //To access all properties.
    if (elem instanceof CamundaPropertiesImpl)
    {
        CamundaPropertiesImpl camundaPropertiesImpl = (CamundaPropertiesImpl) elem;
        Collection<CamundaProperty> camundaProperties = camundaPropertiesImpl.getCamundaProperties();
        for (CamundaProperty test : camundaProperties)
        {
            System.out.println("camunda property name :" + test.getCamundaName() + " $ " + test.getCamundaValue());
        }
    }
    else if (elem instanceof CamundaInputOutputImpl)
    {
        // To access input/output param
        CamundaInputOutputImpl camundaInputOutputImpl = (CamundaInputOutputImpl) elem;
        for (CamundaInputParameter test : camundaInputOutputImpl.getCamundaInputParameters())
        {
            log.info("camunda input params name :" + test.getCamundaName() + " $ " + test.getTextContent());
        }
        for (CamundaOutputParameter test : camundaInputOutputImpl.getCamundaOutputParameters())
        {
            log.info("camunda output params name :" + test.getCamundaName() + " $ " + test.getTextContent());
        }
    }
 }
}