JMX RMI 访问

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RMI（Remote Method Invocation）
RMI是不同JVM之间的对象通信的协议

JMX RMI访问的基本步骤:
1
 启动MBeanServer
 
2
 建立并启动 NamingService MBean,实际就是rmiregistry
 
3
 为MBeanServer建立160 JMX RMIConnector,此RMI连接器提供:
service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxconnector
 
4
 客户端连接
4.1
 通用客户端(如jconsole)
 
4.2
 自定义客户端
生成 JMXConnector ,与JMI server建立 RMI连接
建立与MBean server的连接
MBeanServerInvocationHandler.newProxyInstance()获取代理MBean
 

 

JMX RMI例子
1. RMI Server
package com.machome.jmx.appTest;

import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;

import com.machome.bean.Hello;

import mx4j.tools.naming.NamingService;

public class RmiServer
{
    private MBeanServer mBeanServer;
    private JMXConnectorServer connectorServer;
    private JMXServiceURL jmxUrl;
  
    public RmiServer() throws Exception{
          mBeanServer = MBeanServerFactory.createMBeanServer();
          createRmiregistry();
          CreateJMXConnector();
    }
   public static void main(String[] args) throws Exception
   {
    
       RmiServer rmiServer = new RmiServer();
       // 加一个测试MBean Hello对象
       rmiServer.addMbean(new Hello(), "mbean", "name", "hello");
       rmiServer.startJMXConnector();
     
       System.out.println("Server up and running");
   }
 
   public ObjectName addMbean(Object o,String domain,String key,String value) throws Exception{
          ObjectName oName = new ObjectName(domain, key, value);
          mBeanServer.registerMBean(o, oName);
          return oName;
}
 
 
   public void createRmiregistry() throws Exception{
        
          // 1.注册NamingService MBean
          ObjectName namingName = ObjectName
                      .getInstance("naming:type=rmiregistry");
          // 这里采用MC4J的mx4j.tools.naming.NamingService
          NamingService ns = new NamingService();
        
          mBeanServer.registerMBean(ns, namingName);
          // 2.启动NamingService MBean
          mBeanServer.invoke(namingName, "start", null, null);
   }
 
 
   public void CreateJMXConnector() throws Exception{

          // 1.nammingPort,从NamingService获得Port,缺省是1099
          ObjectName namingName = ObjectName.getInstance("naming:type=rmiregistry");
     int namingPort = ((Integer)mBeanServer.getAttribute(namingName, "Port")).intValue();
       
          // 2. jndiPath
          String jndiPath = "/jmxconnector";
          // 3. JMXServiceURL ,为:
          // service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxconnector
          jmxUrl = new JMXServiceURL("service:jmx:rmi://localhost/jndi/rmi://localhost:"
                                              + namingPort + jndiPath);
        
          // 4.Create and start the RMIConnectorServer
          // 中间设为null的参数,是针对认证的,我们这里没打开,设为null
             connectorServer = JMXConnectorServerFactory
                                  .newJMXConnectorServer(jmxUrl, null, mBeanServer);
   }
 
   public void startJMXConnector() throws Exception{
       connectorServer.start();
   }
 
   public void stopJMXConnector() throws Exception{
       connectorServer.stop();
   }
 
}
 

执行此RmiServer:
Server up and running

可以看到TCP 1099端口被listen
D:\Documents and Settings\mac>netstat -an

Active Connections

  Proto  Local Address          Foreign Address        State
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
  TCP    0.0.0.0:1025           0.0.0.0:0              LISTENING
  TCP    0.0.0.0:1099           0.0.0.0:0              LISTENING
  TCP    0.0.0.0:2737           0.0.0.0:0              LISTENING
  TCP    0.0.0.0:3306           0.0.0.0:0              LISTENING
  TCP    0.0.0.0:6059           0.0.0.0:0              LISTENING
  TCP    0.0.0.0:6648           0.0.0.0:0              LISTENING
 
2.通用客户端(典型的比如jconsole)
这里用的是jdk 1.6 jconsole
远程进程:
service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxconnector

用户名:
口令:
用户名和口令都可以空着,不必输入
 
点"连接",可以进入jconsole界面
可以在mbean下看到hello对象
 
3. 自定义client 端通过RMI连接 Server
package com.machome.jmx.appTest;

import javax.management.JMX;
import javax.management.MBeanServerConnection;
import javax.management.MBeanServerDelegateMBean;
import javax.management.MBeanServerInvocationHandler;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

import com.machome.bean.Hello;
import com.machome.bean.HelloMBean;

 

public class RmiClient
{
    private JMXServiceURL jmxUrl;
    private JMXConnector connector;
    private MBeanServerConnection mBeanServerconnection;
  
  
    public RmiClient()throws Exception{
        createJMXRmiConnector();
        createMBeanServerConnection();
    }
  
   public static void main(String[] args) throws Exception
   {
       new RmiClient().test();
     
   }
 
 
   private void createJMXRmiConnector() throws Exception{
          // 1.The JMXConnectorServer protocol
          String serverProtocol = "rmi";

          // 2.The RMI server's host
          // this is actually ignored by JSR 160
          String serverHost = "localhost";

          // 3.The host, port and path where the rmiregistry runs.
          String namingHost = "localhost";
          int namingPort = 1099;
          String jndiPath = "/jmxconnector";

          // 4. connector server url
          jmxUrl = new JMXServiceURL("service:jmx:" +
                  serverProtocol + "://" + serverHost +
                  "/jndi/rmi://" + namingHost + ":" +
                  namingPort + jndiPath);
        
          // 5. 生成 JMXConnector,连接到url一端
          // Connect a JSR 160 JMXConnector to the server side
          connector = JMXConnectorFactory.connect(jmxUrl);

   }
 
 
   private void createMBeanServerConnection() throws Exception{
       mBeanServerconnection = connector.getMBeanServerConnection();
   }
 
 
   public void test()throws Exception{
 
       ObjectName  oName = new ObjectName("mbean", "name", "hello");
       // 获取代理对象
       Object proxy = MBeanServerInvocationHandler
         .newProxyInstance(mBeanServerconnection,oName, HelloMBean.class, true);
               

      
        // 获取测试MBean,并执行它的(暴露出来被管理监控的)方法     
       HelloMBean helloMBean = (HelloMBean)proxy;
     
       helloMBean.setName("mac");
       helloMBean.printHello();
       helloMBean.printHello("haha");
  
   }
 
}
 
执行:
Server up and running
Hello, mac
Hello, haha
 

 

上面例子中RMI中的rmiregistry MBean,我们采用的mc4j-tools.jar中的 NamingService,代码如下,代码并不复杂,其实我们也可以自定义一个代替它:
public class NamingService  implements NamingServiceMBean
{
    public NamingService()
    {
        this(1099);
    }

    public NamingService(int port)
    {
        setPort(port);
    }

    public void setPort(int port)
    {
        if(isRunning())
        {
            throw new IllegalStateException("NamingService is running, cannot change the port");
        } else
        {
            m_port = port;
            return;
        }
    }

    public int getPort()
    {
        return m_port;
    }

    public boolean isRunning()
    {
        return m_running;
    }

    public void start()
        throws RemoteException
    {
        if(!isRunning())
        {
            m_registry = LocateRegistry.createRegistry(getPort());
            m_running = true;
        }
    }

    public void stop()
        throws NoSuchObjectException
    {
        if(isRunning())
            m_running = !UnicastRemoteObject.unexportObject(m_registry, true);
    }

    public String[] list()
        throws RemoteException
    {
        if(!isRunning())
            throw new IllegalStateException("NamingService is not running");
        else
            return m_registry.list();
    }

    public void unbind(String name)
        throws RemoteException, NotBoundException
    {
        if(!isRunning())
        {
            throw new IllegalStateException("NamingService is not running");
        } else
        {
            m_registry.unbind(name);
            return;
        }
    }

    private int m_port;
    private Registry m_registry;
    private boolean m_running;
}
 
MBean接口:
public interface NamingServiceMBean
{

    public abstract void setPort(int i);

    public abstract int getPort();

    public abstract boolean isRunning();

    public abstract void start()
        throws RemoteException;

    public abstract void stop()
        throws NoSuchObjectException;

    public abstract String[] list()
        throws RemoteException;

    public abstract void unbind(String s)
        throws RemoteException, NotBoundException;
}
 

 

spring 下的 RMI connector
1.spring 配置如下:
  
     
  
   

   
   
      
   
              class="org.springframework.jmx.export.assembler.MetadataMBeanInfoAssembler">
       
       
   
      
   
              class="org.springframework.jmx.export.annotation.AnnotationJmxAttributeSource"/>

   
             class="org.springframework.remoting.rmi.RmiRegistryFactoryBean"
         destroy-method="destroy">
     
   
          
           class="org.springframework.jmx.support.ConnectorServerFactoryBean"
       depends-on="registry">
       
                value="service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxconnector"/>
      
       
      
       
       
       
       
   
 
  
   
        lazy-init="false">
       
       
      
       
      
       
       
           
       
      
   
 
2. web.xml装载spring 配置
      
   
       contextConfigLocation
      
               classpath:ssh-mysql.xml
       
   
   
        org.springframework.web.context.ContextLoaderListener
   
 
3.将项目部署入Tomcat
启动Tomcat
 
不需要执行任何servlet,action,只要spring随Tomcat启动,就会看到TCP 1099端口被listen
D:\Documents and Settings\mac>netstat -an

Active Connections

  Proto  Local Address          Foreign Address        State
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
  TCP    0.0.0.0:1025           0.0.0.0:0              LISTENING
  TCP    0.0.0.0:1099       0.0.0.0:0           LISTENING
  TCP    0.0.0.0:2737           0.0.0.0:0              LISTENING  
 
4. 执行通用客户端(典型的比如jconsole)
这里用的是jdk 1.6 jconsole
远程进程:
service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxconnector

用户名:
口令:
用户名和口令都可以空着,不必输入
 
 
点"连接",可以进入jconsole界面
与前面application RMI的例子不同,这里的不仅可以看到hello MBean对象,还能看到很多MBean对象,如Catalina目录下的很多MBean,因为spring没有定义新的MBeanServer,而是用 tomcat容器自己的MBeanServer,所以能看到很多Tomcat容器自己的service MBean
 
5.执行前面application RMI的例子的RmiClient
Hello, mac
Hello, haha
 
(我在spring rmi 例子和application rmi 例子用的相同的serviceUrl,都是
service:jmx:rmi://localhost/jndi/rmi: //localhost:1099/jmxconnector
因此客户端可以访问这两种例子的Server)

 

简化后的spring RMI
其实spring 例子里的spring 配置的no.2,no.3.no.4都可以不用
MBeanServer可以不用建立,spring会自动搜索容器自己的MBeanServer,
MBeanInfoAssembler和AnnotationJmxAttributeSource 则只是提供注释MBean功能,以代替implement MBean接口,完全可以不用这种注释,而用传统的implement MBean接口

  
   
  
   
   
     
   
          
   
       
       

      
       
       
       
       
   
  
  
   
        lazy-init="false">