这篇文章主要介绍“如何使用JMX监控Tomcat”，在日常操作中，相信很多人在如何使用JMX监控Tomcat问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”如何使用JMX监控Tomcat”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
String jmxURL = "service:jmx:rmi:///jndi/rmi://192.168.10.93:8999/jmxrmi";
JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
Map map = new HashMap();
// 用户名密码，在jmxremote.password文件中查看
String[] credentials = new String[] { "monitorRole", "tomcat" };
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-8080");
MBeanInfo mbInfo = mbsc.getMBeanInfo(threadObjName);
// tomcat的线程数对应的属性值
String attrName = "currentThreadCount";
MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();
System.out.println("currentThreadCount:" + mbsc.getAttribute(threadObjName, attrName));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;
/**
* @author liuyazhuang
* @date 2016-05-31
*/
public class JMXTest {
/**
* main方法
* @param args
*/
public static void main(String[] args) {
try {
String jmxURL = "service:jmx:rmi:///jndi/rmi://127.0.0.1:8999/jmxrmi";
JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
Map map = new HashMap();
String[] credentials = new String[] { "monitorRole", "tomcat" };
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-8080");
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:" + JMXTest.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();
}
}到此，关于“如何使用JMX监控Tomcat”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注亿速云网站，小编会继续努力为大家带来更多实用的文章！
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