topic Re: How to get from properties based on task definition id in Alfresco Archive

How to get from properties based on task definition id

samarjit — Tue, 31 Mar 2015 07:36:49 GMT

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:formPrope

Re: How to get from properties based on task definition id

jbarrez — Tue, 31 Mar 2015 09:28:34 GMT

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.

Re: How to get from properties based on task definition id

samarjit — Wed, 01 Apr 2015 06:06:48 GMT

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?


ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();//requires activiti.cfg.xml 
ProcessEngineConfiguration  processEngineConfiguration = processEngine.getProcessEngineConfiguration();

CommandExecutor commandExecutor = ((ProcessEngineConfigurationImpl) processEngineConfiguration).getCommandExecutor();
ProcessDefinitionEntity processDefinitionEntity = commandExecutor.execute(new Command<ProcessDefinitionEntity>() {
     public ProcessDefinitionEntity execute(CommandContext commandContext) {
          return Context.getProcessEngineConfiguration()
                        .getDeploymentManager()
                        .findDeployedLatestProcessDefinitionByKey("MultipleQueue");
     }
});

 
TaskDefinition taskDefinition = processDefinitionEntity.getTaskDefinitions().get("AlertQueueTask");

System.out.println(taskDefinition.getTaskFormHandler().createTaskForm(new TaskEntity()).getFormProperties());
List<FormProperty> formProperties = taskDefinition.getTaskFormHandler().createTaskForm(new TaskEntity()).getFormProperties();
for (FormProperty formProp : formProperties) {
 System.out.println("form prop:"+ formProp.getId() +"          type:"+ formProp.getType()+"          default value:"+formProp.getValue());
}

Re: How to get from properties based on task definition id

trademak — Wed, 01 Apr 2015 11:25:21 GMT

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,

Re: How to get from properties based on task definition id

samarjit — Fri, 24 Apr 2015 17:02:53 GMT

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