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From Alasdair Nottingham <...@apache.org>
Subject Re: [jira] Created: (ARIES-141) Add a factory class to allow the OSGi JMX MBeans to be registered in an external MBean server
Date Wed, 03 Feb 2010 22:00:38 GMT
Hi,

Back when ARIES-29 was originally raised I expressed a concern about
the aries agent working the way it does. However I always wanted a
more flexable approach so we can reuse the MBeans with a different
agent.

Stepping back for a sec here are my requirements:

1. I have an MBeanServer that is mine, it is not public and I do not
want to put it in the service registry to be used by others.
2. I would like to have two separate OSGi frameworks running at once
in a JVM, but without needing to install the bundle into each
framework.
3. I want to control whether MBeans are registered for compendium services.
4. I have an MBeanServer that federates multiple MBeanServers
together. I wish to register the MBean with additional properties to
allow me to select between the multiple Mbeans that will be available.

As far as I can tell none of these is possible. I like Tim's
suggestion because I can be in total control of how the management
agent works and implement 1-4, but still reuse the MBean
implementations in aries. However looking at the code I think there is
an possible alternative which I thought I would throw out there. If
the JMXAgent was available in the service registry I should be able to
do requirements 1, 3 and 4. However since I want to get 2 in as well I
think we could have a factory to create JMXAgent instances.

What do you think?
Alasdair

On 3 February 2010 18:43, adam wojtuniak <adamwojtuniak@gmail.com> wrote:
> Hi Tim
>
> Iam against exposing MBeans outside JMX bundle.
> Lifecycle of all MBeans is managed by JMX bundle using MBeanHandlers and I
> think it should be this way.
> In your factory you are using framework MBeans but what will happen if you
> want to use
> compendium MBeans. They all created based on availability of compendium
> services which is managed
> inside JMX bundle. In such a case the outside user will have to manage those
> MBeans
> by himslef. Even he can't be sure if could get MBean from JMX could be not
> available at the time.
> Currently the best way to register MBeans in an external MBean server is to
> register the server as a
> service.
>
> Regards,
> Adam Wojtuniak
>
> On Wed, Feb 3, 2010 at 4:21 PM, Tim Mitchell (JIRA) <jira@apache.org> wrote:
>
>> Add a factory class to allow the OSGi JMX MBeans to be registered in an
>> external MBean server
>>
>> ---------------------------------------------------------------------------------------------
>>
>>                 Key: ARIES-141
>>                 URL: https://issues.apache.org/jira/browse/ARIES-141
>>             Project: Aries
>>          Issue Type: Improvement
>>          Components: JMX
>>            Reporter: Tim Mitchell
>>            Priority: Minor
>>         Attachments: JMXFactoryPatch.txt
>>
>> Currently there is no way of accessing the Apache Aries MBeans in order to
>> register them in an external MBean server. I am proposing a factory class
>> that will be exported from the jmx bundle that will allow users to access
>> the internal MBean.
>> I have supplied a patch with my suggested class.
>>
>> --
>> This message is automatically generated by JIRA.
>> -
>> You can reply to this email to add a comment to the issue online.
>>
>>
>



-- 
Alasdair Nottingham
not@apache.org

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