count tomcat busy threads by groovy JMX

gistfile1.groovy

import javax.management.ObjectName
import javax.management.remote.JMXConnectorFactory as JmxFactory
import javax.management.remote.JMXServiceURL as JmxUrl

serverUrl = 'service:jmx:rmi:///jndi/rmi://localhost:9013/jmxrmi'
conn = JmxFactory.connect(new JmxUrl(serverUrl)).MBeanServerConnection

def query = new ObjectName('Catalina:*')
String[] allNames = conn.queryNames(query, null)

def modules = allNames.findAll{
    name ->
        name.contains('Catalina:type=ThreadPool')
}.collect{ new GroovyMBean(conn, it) }

def busyThreadsCount = 0
modules.each{ m ->
    def obj = new ObjectName(m.name() as String)
    def ret = conn.getAttribute(obj, "currentThreadsBusy")
    busyThreadsCount = busyThreadsCount + ret
}

println(busyThreadsCount)