Wrapping POJOs as Mbeans

infectedrhythms Nov 19, 2004 3:18 PM

If I understand correctly...

I should be able to use my pojo as a service just by providing a jboss-service.xml file.

So something to the likes of...

<?xml version="1.0" encoding="UTF-8"?>

<server>
 <mbean code="package.Mypojo" name="package:service=MyPojoService">
 <attribute name="Message">Hello World</attribute>

 </mbean>


</server>

Right?

If I wanted MyPojo to be started and stoped through the Jboss service events startService, stopService etc... Would I need to wrapy my pojo in an XMbean and define the operations?

Also when would I actually want to implement MyPojo using the ServiceMean and ServiceMbeanSupport interafce and class?

thanks

1. Re: Wrapping POJOs as Mbeans

dimitris Nov 19, 2004 3:31 PM (in response to infectedrhythms)

If you want to make your POJO appear as an MBean you *must* use an mbean + xmbean descriptor.

Extending ServiceMBeanSupport is useful if you want to do things like produce or consume notifications, invoke on other MBeans, etc., in general things that translate to your class having knowledge of JMX.

You can also do both, i.e extend ServiceMBeanSupport *and* use an mbean+xmbean descriptor

Using the xmbean descriptor allows you to:

add rich metadata descriptions
produce automatically AttributeChangeNotification on attribute updates
persist attribute changes
cache attribute values
add your own interceptors
...
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