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How to get the ProcessDiagram for a particular instance?

giri1

I am creating webapp by referring the jar files of an activiti. Till now i am able to do most of the things and now I need to get the process diagram for a particular instance in webapp. I am able to get the diagram for a process like this.

InputStream imageStream = repositoryService.getProcessDiagram(ProcessDefinitionId);

But is there a way to get the diagram for a particular process instance ?

Thanks.

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Comments

martin_grofcik

Hi Giri,

what do you mean by diagram for a particular process instance?

you can get process definition from process instance and generate diagram for given process definition.
write something special into process diagram (https://github.com/gro-mar/activiti-crystalball/wiki/Drawing-into-process-diagram, https://github.com/gro-mar/activiti-crystalball/wiki/Getting-started#usecase-1---use-artifical-user-behavior-for-testing,
instead of process definition diagram you could use audit trail diagram (https://github.com/gro-mar/activiti-crystalball/wiki/Audit-trail-diagram)

Regards
Martin

giri1

I think you got me correctly..I want to get the diagram which shows the process flow for the particular instance..So you are telling that I need to get the diagram and do other stuff on that, Like you have specified in the second point.

If it is possible can you provide me some more sample's to refer?

martin_grofcik

Hi Giri,

What exactly are you looking for?
(activiti-crystalball is part of the activiti now. and all code is opensource.)

Regards
Martin

giri1

Hi Martin,

What do u mean by (activiti-crystalball is part of the activiti now. and all code is opensource.)?
You mean that jar files of activiti itself has activiti-crystalball class also or what (I don't get it)..

I need exactly like the last image in this page this https://github.com/gro-mar/activiti-crystalball/wiki/Drawing-into-process-diagram

is it possible to get that kind of image through API or I need to go for activiti-crystalball/ProcessInstanceGenerator.

martin_grofcik

Hi Giri.

The best samples are on the activiti-crystalball wiki pages and source code (https://github.com/gro-mar/activiti-crystalball) or (https://github.com/Activiti/Activiti)

For this case you have to use generator from crystalball.

Regards
Martin

giri1

Hi Martin,

I am able to get the diagram with source code of generator from crystallball. I have completed most of my requirements with Activiti. But I have doubt, That I am doing it in a correct way or not. If I share what I am doing with you, can suggest me on that?

martin_grofcik

Hi Giri.

What is your question?

Regards
Martin

giri1

Hi Martin,

I am creating webapp using activiti jar.

This is the way i am accessing activiti API from web app.

<java>      //To get configuration info
processEngine = ProcessEngines.getDefaultProcessEngine();

RuntimeService runtimeService = AuthenticationServlet.processEngine
    .getRuntimeService();

       //To start new process instance
   runtimeService.startProcessInstanceById(
     id, map).getProcessInstanceId();
   TaskService taskService = AuthenticationServlet.processEngine
    .getTaskService();

                //To get the task list for particular user
                taskService.createTaskQuery().taskAssignee(user).list();

   //Get and set the task variables
taskService.getVariable(taskid,"username").toString();
taskService.setVariable(taskid, "approval", approvestatus);

//Completing task
taskService.complete(taskid);
</java>
I want to make sure that is this the correct way of doing it or will it cause any performance issue?

martin_grofcik

Hi Giri,
(Your last comment is not connected with the thread topic)
I do not expect any performance issues on the activiti side.

Regards
Martin

giri1

Hi Martin,

Thanks for all your quick responses and sorry for that last comment which is not thread topic, But I just wanted to confirm the way I going ahead is correct. Because I am seeing something like FormService and etc.. from activiti. So only I want to make sure the way I am doing.

Thanks again for your time.