JMX获取JVM的信息
//获取JVM的信息
import java.lang.management.MemoryUsage;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
public class test {
/**
* @param args
*/
public static void main(String[] args) {
try {
String jmxURL = "service:jmx:rmi:///jndi/rmi://192.168.1.126:7999/jmxrmi";//tomcat jmx url
JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
Map map = new HashMap();
String[] credentials = new String[] { "monitorRole", "QED" };
map.put("jmx.remote.credentials", credentials);
JMXConnector connector = JMXConnectorFactory.connect(serviceURL, map);
MBeanServerConnection mbsc = connector.getMBeanServerConnection();
//端口最好是动态取得
ObjectName threadObjName = new ObjectName("Catalina:type=ThreadPool,name=http-8089");
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));
//heap
for (int j = 0; j < mbsc.getDomains().length; j++) {
System.out.println("###########" + mbsc.getDomains()[j]);
}
Set MBeanset = mbsc.queryMBeans(null, null);
System.out.println("MBeanset.size() : " + MBeanset.size());
Iterator MBeansetIterator = MBeanset.iterator();
while (MBeansetIterator.hasNext()) {
ObjectInstance objectInstance = (ObjectInstance) MBeansetIterator.next();
ObjectName objectName = objectInstance.getObjectName();
String canonicalName = objectName.getCanonicalName();
System.out.println("canonicalName : " + canonicalName);
if (canonicalName.equals("Catalina:host=localhost,type=Cluster")) {
// Get details of cluster MBeans
System.out.println("Cluster MBeans Details:");
System.out.println("=========================================");
//getMBeansDetails(canonicalName);
String canonicalKeyPropList = objectName.getCanonicalKeyPropertyListString();
}
}
//------------------------- system ----------------------
ObjectName runtimeObjName = new ObjectName("java.lang:type=Runtime");
System.out.println("厂商:" + (String) mbsc.getAttribute(runtimeObjName, "VmVendor"));
System.out.println("程序:" + (String) mbsc.getAttribute(runtimeObjName, "VmName"));
System.out.println("版本:" + (String) mbsc.getAttribute(runtimeObjName, "VmVersion"));
Date starttime = new Date((Long) mbsc.getAttribute(runtimeObjName, "StartTime"));
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("启动时间:" + df.format(starttime));
Long timespan = (Long) mbsc.getAttribute(runtimeObjName, "Uptime");
System.out.println("连续工作时间:" + test.formatTimeSpan(timespan));
//------------------------ JVM -------------------------
//堆使用率
ObjectName heapObjName = new ObjectName("java.lang:type=Memory");
MemoryUsage heapMemoryUsage = MemoryUsage.from((CompositeDataSupport) mbsc.getAttribute(heapObjName,
"HeapMemoryUsage"));
long maxMemory = heapMemoryUsage.getMax();//堆最大
long commitMemory = heapMemoryUsage.getCommitted();//堆当前分配
long usedMemory = heapMemoryUsage.getUsed();
System.out.println("heap:" + (double) usedMemory * 100 / commitMemory + "%");//堆使用率
MemoryUsage nonheapMemoryUsage = MemoryUsage.from((CompositeDataSupport) mbsc.getAttribute(heapObjName,
"NonHeapMemoryUsage"));
long noncommitMemory = nonheapMemoryUsage.getCommitted();
long nonusedMemory = heapMemoryUsage.getUsed();
System.out.println("nonheap:" + (double) nonusedMemory * 100 / noncommitMemory + "%");
ObjectName permObjName = new ObjectName("java.lang:type=MemoryPool,name=Perm Gen");
MemoryUsage permGenUsage = MemoryUsage.from((CompositeDataSupport) mbsc.getAttribute(permObjName, "Usage"));
long committed = permGenUsage.getCommitted();//持久堆大小
long used = heapMemoryUsage.getUsed();//
System.out.println("perm gen:" + (double) used * 100 / committed + "%");//持久堆使用率
//-------------------- Session ---------------
ObjectName managerObjName = new ObjectName("Catalina:type=Manager,*");
Set<ObjectName> s = mbsc.queryNames(managerObjName, null);
for (ObjectName obj : s) {
System.out.println("应用名:" + obj.getKeyProperty("path"));
ObjectName objname = new ObjectName(obj.getCanonicalName());
System.out.println("最大会话数:" + mbsc.getAttribute(objname, "maxActiveSessions"));
System.out.println("会话数:" + mbsc.getAttribute(objname, "activeSessions"));
System.out.println("活动会话数:" + mbsc.getAttribute(objname, "sessionCounter"));
}
//----------------- Thread Pool ----------------
ObjectName threadpoolObjName = new ObjectName("Catalina:type=ThreadPool,*");
Set<ObjectName> s2 = mbsc.queryNames(threadpoolObjName, null);
for (ObjectName obj : s2) {
System.out.println("端口名:" + obj.getKeyProperty("name"));
ObjectName objname = new ObjectName(obj.getCanonicalName());
System.out.println("最大线程数:" + mbsc.getAttribute(objname, "maxThreads"));
System.out.println("当前线程数:" + mbsc.getAttribute(objname, "currentThreadCount"));
System.out.println("繁忙线程数:" + mbsc.getAttribute(objname, "currentThreadsBusy"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static String formatTimeSpan(long span) {
long minseconds = span % 1000;
span = span / 1000;
long seconds = span % 60;
span = span / 60;
long mins = span % 60;
span = span / 60;
long hours = span % 24;
span = span / 24;
long days = span;
return (new Formatter()).format("%1$d天 %2$02d:%3$02d:%4$02d.%5$03d",
days, hours, mins, seconds, minseconds).toString();
}
}
MBean的
import java.util.Iterator;
import java.util.Set;
import javax.management.Attribute;
import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.MBeanServerInvocationHandler;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
public class Client {
public static void main(String[] args) throws Exception {
JMXServiceURL url = new JMXServiceURL(
"service:jmx:rmi:///jndi/rmi://localhost:9999/server");
JMXConnector jmxc = JMXConnectorFactory.connect(url, null);
MBeanServerConnection mbsc = jmxc.getMBeanServerConnection();
ObjectName mbeanName = new ObjectName("chengang:name=HelloWorld");
// 把所有Domain都打印出来
System.out.println("Domains:---------------");
String domains[] = mbsc.getDomains();
for (int i = 0; i < domains.length; i++) {
System.out.println("\tDomain[" + i + "] = " + domains[i]);
}
// MBean的总数
System.out.println("MBean count = " + mbsc.getMBeanCount());
// 对name属性的操作（属性名的第一个字母要大写）
mbsc.setAttribute(mbeanName, new Attribute("Name", "PANDA"));// 设值
System.out.println("Name = " + mbsc.getAttribute(mbeanName, "Name"));// 取值
// 得到proxy代理后直接调用的方式
HelloMBean proxy = (HelloMBean) MBeanServerInvocationHandler
.newProxyInstance(mbsc, mbeanName, HelloMBean.class, false);
proxy.printHello();
proxy.printHello("Raymend");
// 远程调用的方式
mbsc.invoke(mbeanName, "printHello", null, null);
mbsc.invoke(mbeanName, "printHello", new Object[] { "熊猫烧香" },
new String[] { String.class.getName() });
// 得mbean的信息
MBeanInfo info = mbsc.getMBeanInfo(mbeanName);
System.out.println("Hello Class: " + info.getClassName());
System.out.println("Hello Attriber："
+ info.getAttributes()[0].getName());
System.out.println("Hello Operation："
+ info.getOperations()[0].getName());
// 得到所有的MBean的ObjectName
System.out.println("all ObjectName：---------------");
Set set = mbsc.queryMBeans(null, null);
for (Iterator it = set.iterator(); it.hasNext();) {
ObjectInstance oi = (ObjectInstance) it.next();
System.out.println("\t" + oi.getObjectName());
}
// 关闭MBeanServer连接
jmxc.close();
}
}