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From "Christian Schneider (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KARAF-1302) Replace MBeanRegistrer with aries jmx whiteboard and remove .management modules
Date Mon, 02 Apr 2012 11:53:22 GMT
Replace MBeanRegistrer with aries jmx whiteboard and remove .management modules
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                 Key: KARAF-1302
                 URL: https://issues.apache.org/jira/browse/KARAF-1302
             Project: Karaf
          Issue Type: Improvement
    Affects Versions: 2.2.5
            Reporter: Christian Schneider
            Assignee: Christian Schneider
             Fix For: 3.0.0


Currently we have a management module for each feature (like bundle or package) and use our
own MBeanRegistrer class to install the mbean into the mbean server. 

This ties our management modules to the MBeanRegistrer. Additionally the setup of the MBeanRegistrer
class reqquires that we install a service tracker for the MBeanServer and hook the register
and unregister methods.

I propose to use a much simpler aproach. Aries JMX Whiteboard allows to register mbeans by
just registering them as a service for an interface of *MBean and adding a property jmx.objectname.
This has the advantage that our management bundles do not need a special dependency and the
setup using the whiteboard pattern is well known from e.g. servlets.

As the MBean registration is passive then we can also make our module structure simpler. We
can move the mbean code and setup into the core module. When the jmx whiteboard extender is
not present the mbean code stays passive. As soon as the management feature is activated the
mbeans become active.


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