运用JMX监控Tomcat

1、先配Tomcat的启动语句，window下tomcat的bin/catalina.bat（linux为catalina.sh），在头上注释部分（.bat为rem、.sh为#）后面加上set JAVA_OPTS=-Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true

(linux为JAVA_OPTS=-Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true)
2、修改jmx远程访问授权。默认为JAVA_HOME/jre/lib/management下jmxremote.access、jmxremote.password（缺省系统提供了个模版jmxremote.password.template改下名就成）

注意：linux下需要该权限，chmod 600 jmxremote.access, chmod 600 jmxremote.password

window下特麻烦，现需要jdk装在NTFS文件系统下，选中文件，点右键“属性”-〉安全，点“高级”，去掉“从父项继承....”，弹出窗口中选“删除”，这样删除了所有访问权限。再选“添加”-〉高级，“立即查找”，选中你的用户，例administrator，点“确定"，“确定"。来到权限窗口，勾选"完全控制"，点"确定"，OK了。

3、用jconsole连接远程linux服务时, IP地址和port都输入正确的情况下,仍然是连接失败 
vi /etc/hosts，将hostname对应的IP改为真实IP

4、测试JMX。启动tomcat，在window“命令行窗口”中输入netstat -an看下8999端口打开没有。若没有，则前面没配对。若已打开，则可在另一台机器的“命令行窗口”中输入jconsole，打开jdk自带的jmx客户端。选远程连接，录入tomcat所在机器的IP，端口例192.168.10.10:8999，帐号、密码在jmxremote.password中，如帐号controlRole，密码R&D（缺省monitorRole只能读，controlRole能读写，jmxremote.access中可配置）。点“连接”。看到图就行了。

5、关于数据。Mbean属性页中给出了相应的数据，Catalina中是tomcat的，java.lang是jvm的。对于加粗的黑体属性值，需双击一下才可看内容

5、关于编程。

public class JMXTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {

		   String jmxURL = "service:jmx:rmi:///jndi/rmi://192.168.10.93:8999/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-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();
	}
}

另外实例：

public ConcurrentHashMap<String, Object> parseJMS(String tempid, ConcurrentHashMap<String, Object> paraMap) {
		MBeanServerConnection mbsc = null;
		try {
			mbsc = connector.getMBeanServerConnection();
			// ------------------------- system ----------------------
			ObjectName runtimeObjName = new ObjectName("java.lang:type=Runtime");
			TabularDataSupport system = (TabularDataSupport) mbsc.getAttribute(runtimeObjName, "SystemProperties");
			//JVM版本
			paraMap.put(tempid + "_JVMVERSION", mbsc.getAttribute(runtimeObjName, "VmVersion"));
			//JVM厂商
			paraMap.put(tempid + "_JVMMANUFACTURER", mbsc.getAttribute(runtimeObjName, "VmVendor"));
			//系统结构
			paraMap.put(tempid + "_SYSTEMSTRUCTURE", system.get(new Object[] {"os.arch"}).get("value"));
			//操作系统
			paraMap.put(tempid + "_OPERATIONSYSTEM", system.get(new Object[] {"os.name"}).get("value"));
			//操作系统版本
			paraMap.put(tempid + "_OPERATIONSYSTEMVERSION", system.get(new Object[] {"os.version"}).get("value"));
			//Tomcat版本
			String t_version = (String) system.get(new Object[] {"org.apache.catalina.startup.TldConfig.jarsToSkip"}).get("value");
			paraMap.put(tempid + "_TOMCATVERSION", t_version == null ? "" : t_version.substring(0, t_version.indexOf("-")));
			//链接Tomcat服务器的响应时间 -------------

			ObjectName heapObjName = new ObjectName("java.lang:type=Memory");
	        MemoryUsage heapMemoryUsage =  MemoryUsage.from((CompositeDataSupport)mbsc.getAttribute(heapObjName, "HeapMemoryUsage"));
	        //JVM已用内存
	        paraMap.put(tempid + "_JVMUSERDMEMORY", heapMemoryUsage.getUsed());
	        //JVM可用内存
	        paraMap.put(tempid + "_JVMAVAILABLEMEMORY", heapMemoryUsage.getCommitted() - heapMemoryUsage.getUsed());
	        //JVM内存总数
	        paraMap.put(tempid + "_JVMTOTALMEMORY", heapMemoryUsage.getCommitted());
	         
	      //----------------- GlobalRequestProcessor ----------------
           ObjectName requestProcessor = new ObjectName("Catalina:type=GlobalRequestProcessor,*");
           Set<ObjectName> s2 = mbsc.queryNames(requestProcessor, null);
           long bytesSents = 0;
           long bytesReceiveds = 0;
           Integer errorCounts = 0;
           Integer requestCounts = 0;
           long processingTimes = 0;
           long maxTimes = 0;
           for (ObjectName obj : s2) {
        	   ObjectName objname = new ObjectName(obj.getCanonicalName());
        	   long bytesSent = (long) mbsc.getAttribute( objname, "bytesSent");
        	   long bytesReceived = (long) mbsc.getAttribute( objname, "bytesReceived");
        	   Integer errorCount = (Integer) mbsc.getAttribute( objname, "errorCount");
        	   Integer requestCount = (Integer) mbsc.getAttribute( objname, "requestCount");
        	   long processingTime = (long) mbsc.getAttribute( objname, "processingTime");
        	   long maxTime = (long) mbsc.getAttribute( objname, "maxTime");
        	   bytesSents += bytesSent;
        	   bytesReceiveds += bytesReceived;
        	   errorCounts += errorCount;
        	   requestCounts += requestCount;
        	   processingTimes += processingTime;
        	   maxTimes += maxTime;
           }
           //发送字节
	       paraMap.put(tempid + "_SENDBYTE", bytesSents);
	       //接收字节
	       paraMap.put(tempid + "_RECIEVEDBYTE", bytesReceiveds);
	       //错误个数
	       paraMap.put(tempid + "_ERRORNUMBER", errorCounts);
	       //请求个数
	       paraMap.put(tempid + "_REQUESTNUMBER", requestCounts);
	       //处理时间
	       paraMap.put(tempid + "_TREATMENTTIME", processingTimes);
	       //最大处理时间
	       paraMap.put(tempid + "_MAXTREATMENTTIME", maxTimes);
	      
	       //----------------- Thread Pool ----------------
           ObjectName threadpoolObjName = new ObjectName("Catalina:type=ThreadPool,*");
           Set<ObjectName> tp = mbsc.queryNames(threadpoolObjName, null);
	       int currentThreadsBusys = 0;
	       int maxThreadss = 0;
           for (ObjectName obj : tp) {
        	   ObjectName objname = new ObjectName(obj.getCanonicalName());
        	   int currentThreadsBusy = (int) mbsc.getAttribute( objname, "currentThreadsBusy");
        	   int maxThreads = (int) mbsc.getAttribute( objname, "maxThreads");
        	   currentThreadsBusys += currentThreadsBusy;
        	   maxThreadss += maxThreads;
           }
           //当前忙碌线程数
	       paraMap.put(tempid + "_CURRENTBUSYTHREADSNUMBER", currentThreadsBusys);
	       //最大线程数
	       paraMap.put(tempid + "_MAXTHREADSNUMBER", maxThreadss);
	       
	       //----------------- RequestProcessor ----------------
	       ObjectName requestProcessor1 = new ObjectName("Catalina:type=RequestProcessor,*");
	       Set<ObjectName> rp = mbsc.queryNames(requestProcessor1, null);
	       long requestProcessingTimes = 0;
	       int portCount = 0;
	       for (ObjectName obj : rp) {
	    	   portCount++;
	    	   ObjectName objname = new ObjectName(obj.getCanonicalName());
	    	   long requestProcessingTime = (long) mbsc.getAttribute(objname, "requestProcessingTime");
	    	   requestProcessingTimes += requestProcessingTime;
	       }
	       //端口平均响应时间
	       paraMap.put(tempid + "_AVERAGERESPONSETIME", portCount == 0 ? requestProcessingTimes : Math.round(requestProcessingTimes/portCount));
	       
	       
	       
		} catch (IOException e) {
			e.printStackTrace();
		} catch (MalformedObjectNameException e) {
			e.printStackTrace();
		} catch (AttributeNotFoundException e) {
			e.printStackTrace();
		} catch (InstanceNotFoundException e) {
			e.printStackTrace();
		} catch (MBeanException e) {
			e.printStackTrace();
		} catch (ReflectionException e) {
			e.printStackTrace();
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} 
		return paraMap;
	}
 
	public static void main(String[] args) {
		DoJob job = new DoJob();
		String tempid = "MW_WS_TOMCAT_AGENT";
		job.connector = TomcatUtil.getJMXOfTomcat("service:jmx:rmi:///jndi/rmi://191.168.2.31:8999/jmxrmi", "", "");
		ConcurrentHashMap<String, Object> paraMap = new ConcurrentHashMap<String, Object>();
		paraMap = job.parseJMS(tempid, paraMap);
		Iterator<String> it = paraMap.keySet().iterator();
		while(it.hasNext()) {
			String key = it.next();
			System.out.println(key + " : " + paraMap.get(key));
		}
	}