Re: jmx question

To add to Simone's answer, when he says...

Dynamic MBeans return the management interface that they want,
implementing getMBeanInfo(), and they're not bound to implement
interfaces.

...this means that the class can decide what MBeanInfo it returns based
for example on constructor parameters. Since the MBeanInfo is the
management interface, that interface can change depending on
constructor parameters, so different instances of the same class can
have different management interfaces. And in fact that is exactly what
happens with the class javax.management.StandardMBean ,
where you specify a Java interface in the constructor, and the
constructed object uses that interface as its management interface.

Éamonn McManus JMX Spec Lead http://weblogs.java.net/blog/emcmanus/

Simone Bordet wrote:

Hi,

On 9/24/07, salztig <[email protected]> wrote:

Hi,

just a jmx question.

Is is possible that a class implements more than one MBeans?

I'm nerly sure that this isn't possible using Standard MBeans, but I'm not
so confident whit jmx technology to know if this could be possibile with
other MBeans types (Dynamic, Open....)

Dynamic MBeans return the management interface that they want,
implementing getMBeanInfo(), and they're not bound to implement
interfaces.

Standard MBeans have to implement one interface that gives them the
status of MBean (the className + "MBean" thing), but that interface
can extends other interfaces, so that:

interface FooMBean { ... }
interface BarMBean { ... }
interface BazMBean extends FooMBean, BarMBean { ... }

Now MBean Baz can be seen as extending MBeans Foo and Bar.

Simon

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