jmx监控笔记

    要求对服务器的heap内存进行监控，下面是可用的代码。如果不能连接jmx端口，检查hostname是否映射为外网IP，或者看我之前关于jconsole一篇笔记。

 

 

public class Test {
	public static void main(String[] args) throws Exception {

		JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://119.110.120.114:8998/jmxrmi");
		JMXConnector jmxc = JMXConnectorFactory.connect(url, null);
		MBeanServerConnection mbsc = jmxc.getMBeanServerConnection();
		ObjectName mbeanName = new ObjectName("java.lang:type=Memory");
		System.out.println("Name = " + mbsc.getAttribute(mbeanName, "HeapMemoryUsage"));// 取值
		
                CompositeDataSupport cds = (CompositeDataSupport)mbsc.getAttribute(mbeanName, "HeapMemoryUsage");
		MemoryUsage heapMemoryUsage =  MemoryUsage.from(cds);
		System.out.println(heapMemoryUsage.getUsed());
		System.out.println(heapMemoryUsage.getInit());
		System.out.println(heapMemoryUsage.getMax());
		System.out.println(heapMemoryUsage.getCommitted());
		
		jmxc.close();

	}
}

   不自己实现代码更好的方式，http://jmxquery.googlecode.com/files/jmxquery-1.0.zip，这个jar对jmx查询进行了封装，可以配合nagios进行告警。

 

--heipark