jmx 实例--最简单的例子

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1，接口

/** * standard MBeans, dynamic MBeans, open MBeans(形如MXBean)  * and model MBeans,@MXBean()注解的接口名字可以任意取 * @author river.wang */@MXBean()public interface CMonitor0 {    public long getUptime();    public String getMemory();}

2，MBean，被管理对象，一如JavaBean。Bean对象，实体，对应资源。。。

/** * @author river.wang */public class ServerMonitor implements CMonitor0{    private final long startTime;    private Runtime runtime = Runtime.getRuntime();    public ServerMonitor() {        startTime = System.currentTimeMillis();    }    public long getUptime() {        return System.currentTimeMillis()-startTime;    }    public String getMemory() {        float freeMemory = (float)runtime.freeMemory();        float totalMemory = (float)runtime.totalMemory();        String memory = "idle scale : "+(freeMemory/totalMemory)+"%; freeMemory="            +(freeMemory)/1024+" KB; totalMemory="+(totalMemory)/1024+" KB" ;        return memory;    }}

3，运行下面程序，就可以用jconsole进行本地连接了

/** * @author river.wang */public class ServerMonitorAgent {    public static void main( String[] args )        throws Exception {        // MBeanServer server=MBeanServerFactory.createMBeanServer(); //不可在jconsole中使用        MBeanServer server = ManagementFactory.getPlatformMBeanServer();// 可在jconsole中使用        // 被管理的bean,"com.jmx"包名任意取        ObjectName monitorName = new ObjectName( "com.jmx:type=ServerMonitor" );        server.registerMBean( new ServerMonitor(), monitorName );        // 必须确保线程活着        Thread.sleep( Long.MAX_VALUE );    }}

4.1，指定端口--Server端

/** * @author river.wang */public class ServerMonitorAgentv2 {    public static void main( String[] args )        throws Exception {        // MBeanServer server=MBeanServerFactory.createMBeanServer(); //不可在jconsole中使用        MBeanServer server = ManagementFactory.getPlatformMBeanServer();// 可在jconsole中使用        // 指定端口        LocateRegistry.createRegistry( 1098 );        JMXServiceURL url = new JMXServiceURL( "service:jmx:rmi:///jndi/rmi://127.0.0.1:" + 1098 + "/myJmx" );        Map<String, Object> env = new HashMap<String, Object>();//        System.setProperty( "com.sun.management.jmxremote.authenticate", "true" );//        env.put( "jmx.remote.credentials", new String[] { "admin", "admin123" } );                JMXConnectorServer cntorServer = JMXConnectorServerFactory.newJMXConnectorServer( url, env, server );        cntorServer.start();        // 被管理的bean,"com.jmx"包名任意取，可以多个Bean        ObjectName monitorName = new ObjectName( "com.jmx:type=ServerMonitor" );        server.registerMBean( new ServerMonitor(), monitorName );    }}

4.2，指定端口--Client端

/** * @author river.wang */public class ServerMonitorClient {    public static void main( String[] args )        throws Exception {        JMXServiceURL url = new JMXServiceURL( "service:jmx:rmi:///jndi/rmi://192.168.22.91:1098/myJmx" );        Map<String, Object> env = new HashMap<String, Object>();//        env.put( "jmx.remote.credentials", new String[] { "admin", "admin123" } );        JMXConnector conn = JMXConnectorFactory.connect(url,env );                CMonitor0 monitor = JMX.newMBeanProxy( conn.getMBeanServerConnection(),             new ObjectName( "com.jmx:type=ServerMonitor" ),CMonitor0.class );        for ( int i = 0; i < 10; i++ ) {            System.out.println( monitor.getUptime() );            System.out.println( monitor.getMemory() );        }        conn.close();    }}

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