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From "Roland Hauser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KARAF-4685) Support session replication through OSGi 6 http whiteboard
Date Wed, 31 Aug 2016 08:22:20 GMT
Roland Hauser created KARAF-4685:
------------------------------------

             Summary: Support session replication through OSGi 6 http whiteboard
                 Key: KARAF-4685
                 URL: https://issues.apache.org/jira/browse/KARAF-4685
             Project: Karaf
          Issue Type: Improvement
          Components: cellar-http
            Reporter: Roland Hauser


Currently, session replication can only be done through specifying the Hazelcast filter/listener
in the web.xml file of a web-application. This can be a serious disadvantage if you also want
to install a web-application to another web-container which does not need clustering, and,
consequently, does not contain the Hazelcast libs. In this case, the application won't start.

I suggest an additional way how session replication could be realized without the need of
modifying the web-app: it could be done through a Cellar component which implements a http
whiteboard. I would realize this as follows:
- Register a Filter/Session listener to the OSGi service registry. Per default, every web-application
installed is considered for session replication.
- It should be possible to configure Hazelcast filter properties either through a config file
inside the OSGI-INF folder of the web-app, or, through the ConfigAdmin service.
- If the sessions of a specific web-application should not be replicated, then this could
be flagged either through a config file inside the OSGI-INF folder of the web-app, or, through
the ConfigAdmin service.

What's your opinion?



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