topic Re: Activiti tasks as web flow in a webapp in Alfresco Archive

Activiti tasks as web flow in a webapp

antonylees — Thu, 20 Jan 2011 16:10:16 GMT

Hi allI'm thinking of using Activiti as a webflow/workflow engine for a webapp I'm designing. I can implement it so that the first request sets off the process but at some point a task will need user input in order to proceed. The engine would then need to decide on the next task based on the inpu

Re: Activiti tasks as web flow in a webapp

frederikherema1 — Thu, 20 Jan 2011 16:21:21 GMT

Hi,

If a process is waiting in a user-task, you can just complete the task, which 'signals' the execution to move further. You can pass the variables you collected from the user too, so you can eg. make gatewa decisions based on what the user put in.

API:

taskService.completeTask(taskId);
taskService.completeTask(taskId, variables);

Re: Activiti tasks as web flow in a webapp

antonylees — Thu, 20 Jan 2011 16:23:18 GMT

Sounds ideal!
Many thanks
Antony

Re: Activiti tasks as web flow in a webapp

antonylees — Mon, 24 Jan 2011 11:28:36 GMT

I've just been trying this out - so I have a user task, that I can complete programmatically, works really well thanks

If the following part of the flow is an exclusive gateway, which depends on the user's input, is the way to do this to create a service task between the user task and the gateway to extract the variables? Or is there a better way?

Re: Activiti tasks as web flow in a webapp

antonylees — Mon, 24 Jan 2011 12:33:04 GMT

Actually, ignore that one, I answered my own question I think - the variables get passed through the flow from one task to another?

Re: Activiti tasks as web flow in a webapp

frederikherema1 — Mon, 24 Jan 2011 12:48:03 GMT

The variables that are passed when the task is completed, are stored on the process-instance. The next task in that process will have access to it, indeed.

Re: Activiti tasks as web flow in a webapp

antonylees — Mon, 24 Jan 2011 13:02:29 GMT

Brilliant, thanks