How to use 'HistoricTaskInstance.getTaskLocalVariables'

[tamutamu]

Hi,

In Activiti v5.13, I can't task local values using "HistoricTaskInstance.getTaskLocalVariables()".

  HistoricTaskInstance histTask =  historyService.createHistoricTaskInstanceQuery().taskId(taskId).singleResult();
  Map<String, Object> locValues = histTask.getTaskLocalVariables(); // locValues is Empty!!
‍‍‍‍

In HistoricTaskInstanceEntity.getTaskLocalVariables(), it seems that "queryVariables" is null.
Why?

thanks for help.

[aitor]

Hi tamutamu,

It depends on whether the variables are saved with <code>task.setVariable()</code> or <code>task.setVariableLocal()</code>
Maybe this post can help you. It's about the scope of variables:

http://forums.activiti.org/content/does-taskvariablevalueequals-method-does-not-work

[tamutamu]

Thanks aitor!

I read that post.
But, I have not obtain the expected results.

Does'nt <code>Task</code> interface have <code>setVariable()</code> and <code>setVariableLocal()</code>?
<code>TaskService</code> interface has <code>setVariable()</code> and <code>setVariableLocal()</code>.

Since <code>HistoryService</code> also does'nt have <code>setVariable()</code> and <code>setVariableLocal()</code>, I tried to use <code>TaksService.setVariableLocal()</code>.
Below Code,
<java>
　Map<String, Object> inVarMap = new HashMap<String, Object>();
　inVarMap.put("VAL", "val");
　taskService.setVariablesLocal(taskId, inVarMap);

　Map<String, Object> outVarMap =
     taskService.createTaskQuery().taskId(taskId).singleResult().getTaskLocalVariables();  // But outVarMap is Empty!!
</java>

However it does not work.
Is This Code wrong?

After ｒun the above code,  <code>VAL</code> value is stored in Table <code>ACT_RU_VARIABLE</code>, and the value of <code>Task_ID_</code> field is exist.

Thank you for your advice.

[martin_grofcik]

Hi tamutamu.

I don't want to ask you silly questions. The can be many reasons (is History turned on, did you use historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables() …..?) The best way could be to create jUnit test.
http://forums.activiti.org/content/sticky-how-write-unit-test

[tamutamu]

Thanks martin.grofcik!
Explanation is insufficient, and I'm sorry.

I found the cause.
I didn't use <code>includeTaskLocalVariables</code>.

<code>HistoricTaskInstance.getTaskLocalVariables</code> javadoc「if requested 」, it is to call includeTaskLocalVariables in task query, isn't it. I wasn't able to notice that.

Thanks and best regards.