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From "Christian Schneider (Work started) (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (KARAF-1302) Replace MBeanRegistrer with aries jmx whiteboard and remove .management modules
Date Mon, 02 Apr 2012 12:59:24 GMT

     [ https://issues.apache.org/jira/browse/KARAF-1302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Work on KARAF-1302 started by Christian Schneider.

> Replace MBeanRegistrer with aries jmx whiteboard and remove .management modules
> -------------------------------------------------------------------------------
>                 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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