activiti extensionElements of user tasks read/write api's

Question

我有一个工作流程，我需要在其中查看用户任务中的一些自定义信息。所以我使用了 extensionElement 如下：

         <userTask id="writeReportTask" name="Write monthly financial report" activiti:assignee="${assignee}" activiti:owner="${owner}">
            <extensionElements>
                <activiti:field name="clientName" stringValue="${clientName}" />
                <activiti:field name="companyName" stringValue="${companyName}" />
            </extensionElements>
          </userTask>

         <userTask id="financeReportTask" name="review monthly financial report" activiti:assignee="${assignee}" activiti:owner="${owner}">
            <extensionElements>
                <activiti:field name="clientName" stringValue="${clientName}" />
                <activiti:field name="companyName" stringValue="${companyName}" />
            </extensionElements>
          </userTask>

在上面的工作流程中，我将存储两个自定义属性 "clientName" 和 "dueDate"。
1.如何通过API为当前激活的任务read/write "clientName"和"companyName"取值？ 2. 在上面的示例中，我存储了字符串值 (stringValue="${clientName}")。有没有一种方法可以存储值列表以及如何通过 API 来 store/retrieve 值列表？

请帮忙

Answer 1

1:

${clientName} 和 ${companyName} 是过程变量。您可以 read/write 从当前执行：

阅读：

Task task = taskService.createTaskQuery().processInstanceId(String.valueOf(processInstanceId)).active().singleResult();
Map<String, Object> variablesMap = runtimeService.getVariables(task.getExecutionId());
String clientName = variablesMap.get("clientName");
String companyName = variablesMap.get("companyName");

写入：

Task task = taskService.createTaskQuery().processInstanceId(String.valueOf(processInstanceId)).active().singleResult();
runtimeService.setVariable(task.getExecutionId(), "clientName", clientName);
runtimeService.setVariable(task.getExecutionId(), "companyName", companyName);

或者您可以将变量存储到您自己的数据库中，然后从中 read/write。

<userTask id="writeReportTask" name="Write monthly financial report" activiti:assignee="${assignee}" activiti:owner="${owner}">
    <extensionElements>
        <activiti:taskListener event="create" delegateExpression="${myTaskListenerBean}">
            <activiti:field name="clientName" stringValue="${clientName}" />
            <activiti:field name="companyName" stringValue="${companyName}" />
        </activiti:taskListener>
    </extensionElements>
</userTask>

public class MyTaskCreateListener implements TaskListener {

    private String clientName;
    private String companyName;

    @Autowired
    private AdditionalTaskDataDao additionalTaskDataDao;

    public void notify(DelegateTask delegateTask) {
        AdditionalTaskData taskData = new AdditionalTaskData();
        taskData.setClientName(clientName);
        taskData.setCompanyName(companyName);
        taskData.setTaskId(delegateTask.getId());

        myDataDao.save(taskData);
    }
}

2:

阅读：

Task task = taskService.createTaskQuery().processInstanceId(String.valueOf(processInstanceId)).active().singleResult();
Map<String, Object> variablesMap = runtimeService.getVariables(task.getExecutionId());

写入：

Task task = taskService.createTaskQuery().processInstanceId(String.valueOf(processInstanceId)).active().singleResult();
runtimeService.setVariables(task.getExecutionId(), variablesMap);