如何使用JMX API获取tomcat 7的内存使用情况? [英] How to get memory usage of tomcat 7 using JMX API?
本文介绍了如何使用JMX API获取tomcat 7的内存使用情况?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
是否可以使用JMX API获取tomcat服务器的内存使用情况统计信息。哪个Mbean可以提供这个信息?我在下面的代码中陷入了ObjectName的形成
Is it possible to get the memory usage statistics of a tomcat server using JMX API. Which Mbean can provide me this info? I am stuck at the formation of ObjectName in the below code
JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://localhost:2020/jmxrmi");
JMXConnector jmxc = JMXConnectorFactory.connect(url);
MBeanServerConnection server = jmxc.getMBeanServerConnection();
Object o = jmxc.getMBeanServerConnection().getAttribute(
new ObjectName("-----");
想知道jconsole如何绘制内存图,源代码的任何指针?
Wonder how jconsole draws the memory graphs, any pointers for the source code?
推荐答案
MBeanServer connection = ManagementFactory.getPlatformMBeanServer();
Set<ObjectInstance> set = connection.queryMBeans(new ObjectName("java.lang:type=Memory"), null);
ObjectInstance oi = set.iterator().next();
// replace "HeapMemoryUsage" with "NonHeapMemoryUsage" to get non-heap mem
Object attrValue = connection.getAttribute(oi.getObjectName(), "HeapMemoryUsage");
if( !( attrValue instanceof CompositeData ) ) {
System.out.println( "attribute value is instanceof [" + attrValue.getClass().getName() +
", exitting -- must be CompositeData." );
return;
}
// replace "used" with "max" to get max
System.out.println(((CompositeData)attrValue).get("used").toString());
这篇关于如何使用JMX API获取tomcat 7的内存使用情况?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文