From: Jeff Mesnil <jmesnil@...>
Date: 2010-08-04T23:46:07+09:00
Subject: Re: jmx4r metaprogramming

aidy wrote:
> Hi,
> 
> I am attempting to use the jmx4r library to set an MBean attribute.

> `method_missing': undefined method `active ='
> 
> exception, when I attempt to set the attribute.

This error is strange, there should not be a white space between 
'active' and '='. The method to set the value should be 'active=', not 
'active ='

This may be due to an error in the description of the MBean.
What you can do:
* check what attributes are exposed by the jmx4r mbean
  irb> standby_mbean.attributes
* check what is exposed by the Real JMX MBean object:
  irb>  JMX::MBean.pretty_print 
"xxx.jmx.monitors:name=hydra.planb.cps,type=JmsQueueStatsMBeanFactory"

In you case, you should see a "Value" attribute which is both readable 
and writable.

hope that helps,
jeff
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