JMX监控Tomcat

环境：Tomcat5.5、jdk6

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、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。

4、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();   
    }   
}  
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();
 }
}
 

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/airobot008/archive/2009/03/03/3951524.aspx