学步园

最近用JAVA写了个获取tomcat信息资源的代码，随便保存一下。

大致的步骤全在这了，可以获取到任何想要的指标：

首先可以用JDK提供的工具jconsole来供我们查看，这个在服务端配置下catalina.bat文件，加入以下内容：

Linux下要监控的java进程需要配置参数：

-Djava.rmi.server.hostname=192.168.1.126   # Linux主机的ip，在windows输入的ip地址

-Dcom.sun.management.jmxremote

-Dcom.sun.management.jmxremote.port=7999    # 通信的端口，windows下输入

-Dcom.sun.management.jmxremote.authenticate=false    #  不需要用户名，密码登录

-Dcom.sun.management.jmxremote.ssl=false

在windows下，打开jconsole或jvisualvm，输入192.168.1.126:7999，不需要用户名密码直接链接即可。

端口7999可以自由更改，前提是没被系统占用。

下面为获取数据代码：

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(); 
    } 
 
}  

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();      
}    
}