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Get processDefinition tasks , start event, end event using Java, without creating a process instance

Hi,
My requirement is to get the details about deployed processDefinition, like Tasks in it, its StartEvent, EndEvent.
But I want to have these without creating a process instance.
Is there a way to achieve this?
I have been looking into activiti user guide as well as javadocs, but couldn't find a way.
Any help will be appreciated. Thanks.

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Hi Mansi,

have a look on the following jUnit test in the activiti source:
org.activiti.engine.test.bpmn.event.end.TerminateEndEventTest#testParseTerminateEndEventDefinitionWithExtensions

Regards
Martin

Hey, Thanks a lot, I looked into that test and was able to proceed with my task.

I also want to know if there is some way to update a processDefinition after creating it once.
Thanks.

Hi Mansi,

I do not know about such a possibility in activiti5 (it could be supported in the activiti6).

Regards
Martin

Okay thanks again.

I have one more question:
Is there a way to create a process definition without specifying configuration in an xml file, instead specifying it programatically?

Hi,

You can deploy process definition with org.activiti.engine.RepositoryService#createDeployment and deploy the deployment afterwards.

Regards
Martin

So ultimately it will need the xml file right? when we will deploy it?

BPMN 2.0 is an XML standard, so yes.
The alternative is creating it in java (see the BpmnModel approach in the class that Martin mentions above).

Hey, Thanks a lot will look into it.

Hello, I found that after creating a process using BpmnModel, it has to be converted to xml for deployment, is that correct? Or is there any other way of doing it?

Also Martin mentioned above that there is no possibility to update a process definition once created. Is there a way to remove the process from BpmnModel using java? Although I couldn't find any such method, if it exists, it would solve my issue. Thanks.

"using BpmnModel, it has to be converted to xml for deployment, is that correct"

No, the repositoryService.createDeployment() takes in a BpmnModel.

"Is there a way to remove the process from BpmnModel using java"

Not sure what you mean by this?

I mean to say, once I do BpmnModel.addProcess(process), is there a way to remove/modify this process from the BpmnModel?

Once it's been deployed, no. Changing the process in the BPMNModel does not have impact on what's deployed.

Thank you so much for your help so far.

I wanted to know whether we can change the Activity_Id manually in Execution of the process,
I mean can we skip the next task in defined sequenceFlow and jump to some xyz task?

You can, but you'd have to write your own command (and execute it via the ManagementService), where you do the right database calls via the ExecutionEntityManager and such. Not supported out of the box.

I am using the Activiti designer to create and deploy a process in Activiti. My process gets deployed with no errors. But when I login to Activiti App, I am unable to start the process in my Task App.

Below are the logs from my Eclipse console :

Mar 18, 2016 2:22:31 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [activiti.cfg.xml]
Mar 18, 2016 2:22:34 PM org.activiti.engine.impl.ProcessEngineImpl
INFO: ProcessEngine default created
Mar 18, 2016 2:22:34 PM org.activiti.engine.impl.bpmn.deployer.BpmnDeployer deploy
INFO: Processing resource myProcess.bpmn20.xml
id 40005 myProcess:12:40004

Below is my Junit Test :

public void startProcess() throws Exception
{
RepositoryService repositoryService = activitiRule.getRepositoryService();
repositoryService.createDeployment().name("working set").addInputStream("myProcess.bpmn20.xml",
new FileInputStream(filename)).deploy();
RuntimeService runtimeService = activitiRule.getRuntimeService();

ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("myProcess");
assertNotNull(processInstance.getId());
System.out.println("id " + processInstance.getId() + " "
+ processInstance.getProcessDefinitionId());
}

I have assigned the task to $INITIATOR. The process starts successfully, but when I log into activiti-app as an administrator, I am unable to see the tasks in the task app. Why is that ?

Hey @jbarrez thanks a lot.
Is there a way to know whether a process was suspended at some point , after the processInstance is deleted?
I mean is there a way to know this through the history service?

@Mansi: no, sorry, that info is not stored anywhere.

Okay. Also I don't understand the use of Model class? Could you please explain it in brief.

The model class is an entity that is used when creating a BPMN process definition in the web modeler. It stores a byte array for the data the editor uses.

Alright, Thanks a lot.

Hello, I noticed that only the UserTasks are stored in database and can be accessed later using the
TaskService & HistoricTaskInstance. But if I want to access my ServiceTask / ScriptTask or any other task, how is that possible?

Alternatively is there a way to set variable when process is at particular task and later be able to access the taskId where we set the variables?

Hi,

Try to Increase history log level.

Regards
Martin

I tried HistoryLevel.FULL, it doesn't work.

Check the historicActivityInstance query. A service task is simply an 'activity' for the engine.

Yes there its available. Thanks.

Hi,
When we set a due date in UserTask,
is there a way to tell activiti to complete the task when due date is reached?

No. A user task is meant for humans to complete.
However, it is easy to write a thread that queries on user tasks with a certain due date and complete them programmatically.

Okay thanku.

Is there a Activiti modeler available for netbeans?
I searched through other threads in this forum but I found all negative answers from a couple of years back, so I thought would ask here.

"Is there a Activiti modeler available for netbeans?"

No. We don't see that much use of Netbeans in our community/customers.