topic Re: [DISCUSS] OSGi friendliness ... or more in Alfresco Archive

[DISCUSS] OSGi friendliness ... or more

gnodet — Tue, 05 Oct 2010 13:00:53 GMT

I'd like to be able to deploy Activiti in OSGi, so I'm gonna work on that in the near future and contribute it if there is an interest in that (hopefully there is).I haven't seen any work on that yet, so I guess I'll start from scratch. The question is first: * are developers familiar with OSGi at

Re: [DISCUSS] OSGi friendliness ... or more

gnodet — Tue, 05 Oct 2010 16:14:38 GMT

I'm thinking what would be nice in OSGi would be to have a bundle which would start the activiti ProcessEngine (maybe through a managed service factory, not sure if it makes sense yet) and expose it as an OSGi service, if it's sufficiently configurable, it could be the default bundle distribution in osgi.
For deployment, I'm thinking about having a bundle extender which looks for deployed bundles containing files in a known location, for example in OSGI-INF/activiti/*.bpmn20.xml (this should be configurable using an OSGi manifest header as it's usually the case). This could be the default and we could add a url handler to transform a plain bar file into an osgi bundle as above.
I'll start experimenting with that …

Re: [DISCUSS] OSGi friendliness ... or more

falko_menge — Wed, 06 Oct 2010 08:14:02 GMT

There is definitely interest in making Activiti OSGi-friendly. There is even a JIRA issue for it: http://jira.codehaus.org/browse/ACT-111

Currently, we don't have the resources to work on that and would really appreciate any help.

Re: [DISCUSS] OSGi friendliness ... or more

jbarrez — Wed, 06 Oct 2010 08:48:41 GMT

As Falko says, there is indeed interest to make Activiti OSGI friendly. I know that Tom brought it up several time.
Tom is currently on holdiday (back on Monday), so I'll send him your direction when he is back.

However, there is little OSGO knowledge in the core team, so contributions here are more then welcome!

Re: [DISCUSS] OSGi friendliness ... or more

gnodet — Wed, 06 Oct 2010 09:12:03 GMT

Great, glad to see there's an interest here. I can't assign the issues to myself atm, but I'm definitely planning to work on that the whole OSGi thing.
I've already managed to deploy activiti-pvm and activiti-engine as part of ACT-222, so I'll continue my investigations there.

I think ProcessEngine(s) should be registered as OSGi services, which mean the ProcessEngines class would have to be refactored a bit to allow a pluggable discovery mechanism.

Re: [DISCUSS] OSGi friendliness ... or more

jvazquez — Thu, 07 Oct 2010 18:48:45 GMT

I´m really glad to hear that Guillaume is interested in the Activiti/OSGi stuff. My team and I have worked with ServiceMix and Karaf for a long time and now we are very interested in Activiti too.

Please, let us know if you would appreciate some help in certain areas. Anyway, we´ll stay tuned for more news about your design and core implementation.

Regards.