topic Suspend Functionality in Activiti in Alfresco Archive

Suspend Functionality in Activiti

chandanmb1 — Tue, 29 Mar 2016 06:22:38 GMT

Hi,First of all i need to understand how suspend action works in activiti.Assume, i have a scenario Start -> Service Task1 -> Service Task2 ->EndService Task 1 - counts from 1 to 1000Service Task 2 - counts from 1001 to 2000I am trying to suspend after the execution of Service Task 1 run

Re: Suspend Functionality in Activiti

vasile_dirla — Tue, 29 Mar 2016 08:08:47 GMT

Try to mark the ServiceTask1 and ServiceTask2 as asynchronous and then put an execution listener on ServiceTask1 (listening the end event of this task).
inside this execution listener you could suspend the process instance (exactly as you wrote in the prev. post)

This way the suspendProcessInstanceById will be called between these 2 service tasks in separate transactions.
see: http://www.activiti.org/userguide/#asyncContinuations

I didn't test it but I think it will work.

Re: Suspend Functionality in Activiti

chandanmb1 — Tue, 29 Mar 2016 10:32:12 GMT

Thanks for helping.
I added activiti:async="true" to my bpmn process xml.
But the Service Task 1 didnt executed, but directly it printed the ProcessInstanceID in my console.

I also didnt understand what is execution listener ? and how to add it ?

Re: Suspend Functionality in Activiti

chandanmb1 — Tue, 29 Mar 2016 10:47:45 GMT

This is my sample code. I have added activiti:async=true
MainClass

processEngine = ProcessEngines.getDefaultProcessEngine();

   repositoryService = processEngine.getRepositoryService();
   Deployment deploymentId = repositoryService.createDeployment().addClasspathResource("chanprocess.bpmn20.xml")
     .deploy();

runtimeService = processEngine.getRuntimeService();
processInstance = runtimeService.startProcessInstanceByKey("development");
System.out.println("————–process instance————– : ");
   String procDefId = processInstance.getProcessDefinitionId();
   System.out.println("ProcessDefinitionId : " + procDefId);
   String ProcInstanceId = processInstance.getProcessInstanceId();
   System.out.println("Process Instance ID :::::::::::::::" + ProcInstanceId);

Service Task 1
public void execute(DelegateExecution delegate) throws Exception {

for(int i=0;i<10;i++){
   System.out.println("Task 1 ::::::::Welcome to Bosch");
   Thread.sleep(100);
}

}
@Override
public void notify(DelegateExecution delegate) throws Exception {
String id = delegate.getId();
System.out.println("ID is :::::::::::::"+id);

}

It didnt executed the Service Task 1 class, but directly printed the Process Instance ID in the main class.
Is service Task1 somewhere running ?

Re: Suspend Functionality in Activiti

martin_grofcik — Wed, 30 Mar 2016 06:25:04 GMT

Hi,

Could you create jUnit test please?
https://forums.activiti.org/content/sticky-how-write-unit-test

Regards
Martin

Re: Suspend Functionality in Activiti

chandanmb1 — Wed, 30 Mar 2016 08:54:39 GMT

Hi,
I have created the Junit code , but how to upload the project and where ?

Re: Suspend Functionality in Activiti

chandanmb1 — Thu, 31 Mar 2016 04:26:42 GMT

Hello Martin,

Here is the code.
https://github.com/chandanmb/activitiinaction

Please verify and let me know how to achieve asynchronous action as well as suspend in activiti

Regards,
Chandan

Re: Suspend Functionality in Activiti

chandanmb1 — Thu, 31 Mar 2016 14:26:59 GMT

Hello vasile.dirla /Martin,

Please verify my code uploaded in github.
Let me know your opinions.

Regards,
Chandan

Re: Suspend Functionality in Activiti

martin_grofcik — Mon, 04 Apr 2016 08:06:33 GMT

Hi Chandan,

Pull request with jUnit test example fix
https://github.com/chandanmb/activitiinaction/pull/9

Regards
Martin

Re: Suspend Functionality in Activiti

chandanmb1 — Mon, 04 Apr 2016 11:12:50 GMT

Thanks martin for the code.
But the code is not working as expected i guess.

It is executing the Task 1 and i should get the control in the notify method to stop the further execution of workflow.
Currently , what is happening is
1. It is executing Task1
2. It is executing Task2
3. It is not going for Notify

To achieve is
1. Task 1 to be executed
2. Notify method to be triggered to suspend the further execution of workflow
3. Start the Suspended workflow
4. Should Resume executing from Task 2

Please provide me the solution

Re: Suspend Functionality in Activiti

chandanmb1 — Mon, 04 Apr 2016 14:33:31 GMT

Hello Martin,

Also, whenever we want to pause an execution of workflow. Thread has to terminate otherwise it will consume the memory.
Whenever we resume back, then thread has to start the execution from the same state where it has got paused

Re: Suspend Functionality in Activiti

jbarrez — Thu, 07 Apr 2016 10:00:40 GMT

"Also, whenever we want to pause an execution of workflow. Thread has to terminate otherwise it will consume the memory."

Activiti never keeps threads running nor consumes memory for suspended process instances.

Can you provide a unit test with what you're trying to do? I have a hard time following exactly what you are wanting to achieve.

Re: Suspend Functionality in Activiti

martin_grofcik — Fri, 08 Apr 2016 12:21:14 GMT

Hi,

create failing jUni test similar to org.activiti.MyUnitTest#testServiceProcess

Regards
Martin