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How to get from properties based on task definition id

samarjit

I would like to enumerate the form properties based on task definition id (AlertQueueTask or AlertQueue).

   <userTask id="AlertQueueTask" name="AlertQueue">
      <extensionElements>
        <activiti:formProperty id="AlertName" name="AlertName" type="string"></activiti:formProperty>
        <activiti:formProperty id="Carrier" name="Carrier" type="string"></activiti:formProperty>
        <activiti:formProperty id="DepDate" name="DepDate" type="date"></activiti:formProperty>
 </userTask>
‍‍‍‍‍‍‍‍

Currently closest I could find was retrieval form+data using from fromService using taskId- formService.getTaskFormData(taskId);

On a seperate note I would like to store some fixed properties per task, which is the right place to keep such data. For example I need to store the above list AlertName,Carrier,DepDate per task definition. Which is the right place to store it?

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Comments

jbarrez

That is indeed the correct call to get the form properties.

> Which is the right place to store it?

You could use either variables that are injected by a tasklistener or you could add your own extensionElement and fetch them through the BpmnModel.

samarjit

Thanks for your quick response.

Can you tell more about how to fetch extensionElement by BpmnModel with some code?

I also managed to get the form properties as below, is this correct approach?

<br>ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();//requires activiti.cfg.xml <br>ProcessEngineConfiguration&nbsp; processEngineConfiguration = processEngine.getProcessEngineConfiguration();<br><br>CommandExecutor commandExecutor = ((ProcessEngineConfigurationImpl) processEngineConfiguration).getCommandExecutor();<br>ProcessDefinitionEntity processDefinitionEntity = commandExecutor.execute(new Command<ProcessDefinitionEntity>() {<br>&nbsp;&nbsp;&nbsp;&nbsp; public ProcessDefinitionEntity execute(CommandContext commandContext) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return Context.getProcessEngineConfiguration()<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .getDeploymentManager()<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .findDeployedLatestProcessDefinitionByKey("MultipleQueue");<br>&nbsp;&nbsp;&nbsp;&nbsp; }<br>});<br><br> <br>TaskDefinition taskDefinition = processDefinitionEntity.getTaskDefinitions().get("AlertQueueTask");<br><br>System.out.println(taskDefinition.getTaskFormHandler().createTaskForm(new TaskEntity()).getFormProperties());<br>List<FormProperty> formProperties = taskDefinition.getTaskFormHandler().createTaskForm(new TaskEntity()).getFormProperties();<br>for (FormProperty formProp : formProperties) {<br> System.out.println("form prop:"+ formProp.getId() +"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type:"+ formProp.getType()+"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; default value:"+formProp.getValue());<br>}<br>

trademak

Hi,

You can use the RepositoryService getBpmnModel method to get the BpmnModel of a process definition. Then use getFlowElement to lookup the correct UserTask. On the UserTask object you can get a list of FormProperty objects.

Best regards,

samarjit

Hi,
Thanks for the info. I am posting the code for others to get an idea about the solution.

<code lang="java">
BpmnModel processDefinition = processEngine.getRepositoryService().getBpmnModel("MultipleQueue:22:57504");
UserTask itemDefinitions = (UserTask) processDefinition.getFlowElement("AlertQueueTask");
List<org.activiti.bpmn.model.FormProperty> formProperties2 = itemDefinitions.getFormProperties();
for (org.activiti.bpmn.model.FormProperty formProp : formProperties2) {
System.out.println("form prop:"+ formProp.getId() +" type:"+ formProp.getType()+" default value:"+formProp.getFormValues());
}
Map<String, List<ExtensionElement>> extensionElements = itemDefinitions.getExtensionElements();
System.out.println(extensionElements); //extension element other than form

</code>
Process definition:
<code lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns:myelm="http://www.x.com/myelm" …>
<process id="MultipleQueue" name="MultipleQueue" >
      <userTask id="AlertQueueTask" name="AlertQueue">
      <extensionElements>
     <myelm:newelement id="mynewelementid" name="mynewelementname"></myelm:newelement>
        <activiti:formProperty id="AlertName" name="AlertName" type="string"></activiti:formProperty>
        <activiti:formProperty id="Carrier" name="Carrier" type="string"></activiti:formProperty>
        <activiti:formProperty id="DepDate" name="DepDate" type="date"></activiti:formProperty>
   </extensionElements>
      </userTask>
</process>
</definitions>
</code>
Output:
<code>
form prop:AlertName          type:string          default value:[]
form prop:Carrier          type:string          default value:[]
form prop

epDate type:date default value:[]
{newelement=[org.activiti.bpmn.model.ExtensionElement@d41f816]}
</code>
-Samarjit