Ruby-esque JMX -- Part 2

Below is the code from the JMX tinkering. I snake-ized the keys to be more Ruby-esque, per Ed's suggestion.

require 'java'
include Java

# Obviously stolen from Rails ActiveSupport for underscoring strings
class String
  def underscore
    self.to_s.gsub(/::/, '/').
    gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
    gsub(/([a-z\d])([A-Z])/,'\1_\2').
    tr("-", "_").
    downcase
  end
end

module JMX
  class MBean
    include_class 'javax.management.ObjectName'
    include_package "java.lang.management"
    include_package "javax.management"
    include_package "javax.management.remote"
    include_class "java.util.HashMap"
    attr_accessor :name
    def initialize(object_name)
      @object_name = object_name 
      @name = @object_name.to_s
    end

    def attributes
      attrs =  MBean.connection.getMBeanInfo(@object_name).attributes rescue []
      attrs.inject({}) do |list, a|
        list[a.name.underscore] = MBean.connection.getAttribute(@object_name, "#{a.name}") rescue "Unknown"
        list
      end
    end

    def self.find_all_by_name(name)
      object_name = ObjectName.new(name)
      beans = MBean.connection.queryMBeans(object_name,nil )
      beans.collect {|bean| MBean.new(bean.get_object_name)}
    end

    def self.find_by_name(name)
      #obviously inefficient
      find_all_by_name(name).first
    end

    def self.connection
      @@mbsc ||= begin
        #load from some config file later maybe
        url = "service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi"
        connector = JMXConnectorFactory::connect(JMXServiceURL.new(url), HashMap.new)
        connector.getMBeanServerConnection
      end
    end
    protected

    def method_missing(method, *args, &block)
      attributes.keys.include?(method.to_s) ? attributes[method.to_s] : super
    end
  end
end

#Find all the MBeans matching some object name
mbeans = JMX::MBean.find_all_by_name("java.lang:*")
puts "Found #{mbeans.size} beans"

#Find a bean, and get its attribute
bean = JMX::MBean.find_by_name("java.lang:type=ClassLoading")
puts "There are #{bean.loaded_class_count} classes loaded in that VM"