Scripting JMX via JRuby

I'm gradually growing some operations scripts which use JMX to alter application behaviour according to system load / required maintenance, etc. JRuby is a nice easy way to create these scripts.

host = 'some-ip'
port = 'port-number'
serviceUrl = javax.management.remote.JMXServiceURL.new("service:jmx:rmi:///jndi/rmi://#{host}:#{port}/jmxrmi")
connector = javax.management.remote.JMXConnectorFactory.connect(serviceUrl)
remote = connector.getMBeanServerConnection()
remoteRuntime = java.lang.management.ManagementFactory.newPlatformMXBeanProxy(remote, 
                     java.lang.management.ManagementFactory::RUNTIME_MXBEAN_NAME, 
                     java.lang.management.RuntimeMXBean.java_class)
p remoteRuntime.getName()
connector.close()