package com.test.thread;

import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

public class ThreadThreshold {
    // mbean server connection
    private static MBeanServerConnection mbsc = null;

    /**
     * @param args
     */
    public static void main(String[] args) {
        try {
            String jmxURL = "service:jmx:rmi:///jndi/rmi://localhost:8050/jmxrmi";//tomcat jmx url
            JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
            JMXConnector connector = JMXConnectorFactory.connect(serviceURL,
                    null);

            mbsc = connector.getMBeanServerConnection();
            ObjectName threadObjName = new ObjectName(
                    "Catalina:type=ThreadPool,name=http-8080");//这里说明一下，端口最好是动态取得
            
            MBeanInfo mbInfo = mbsc.getMBeanInfo(threadObjName);
            String attrName = "currentThreadCount";//tomcat的线程数对应的属性值
            
            MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();
            System.out.println("currentThreadCount:"+mbsc.getAttribute(threadObjName, attrName));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}