Activiti as an engine for 'conversational' web workflows?

[excaliber]

I'd like to use Activiti as part of an in-house platform for diagnostic workflows.  Our preferred approach: 

- Activiti included as a jar or jars within a java web application deployed on tomcat 6
- XML ideally deployed separately, outside war files
- ajax/rest-driven interactions on a single view/page (per workflow)
- after initial page load, ajax-based DOM updates handled by a Spring rest controller.

Workflows would consist mostly of automated tasks modelled as a series of real-time ajax interactions and would probably require only a small subset of BPMN.  Currently I use my own simple state machine but I imagine Activiti might allow development to proceed more quickly and scale better to new and larger workflows.

I'm reviewing the demo and docs.  Thoughts are welcome.

[ronald_van_kuij]

modelled as a series of real-time ajax interactions

Can you elaborate a little…

[jbarrez]

I don't know if it is a good idea, because Activiti is really tailored towards database usage.
You could run it in an in-memory database, but that would introduce stange things I guess (never tried), ie is the database shared, what if there are concurrency issues … etc.