Java管理扩展JMX之HelloWorld篇

JMX(Java Management Extensions,即Java管理扩展)是一个为应用程序、设备、系统等植入管理功能的框架。JMX可以跨越一系列异构操作系统平台、系统体系结构和网络传输协议,灵活的开发无缝集成的系统、网络和服务管理应用。
  • 用于发布服务的接口类ITestHelloMXBean.java
[codesyntax lang="java" lines="normal"]
package org.suren.littlebird;

/**
 * @author suren
 * 接口名必须以MXBean结尾
 */
public interface ITestHelloMXBean
{
	public void hello();

	public String getName();
}
[/codesyntax]
  • 用于发布服务的接口实现类TestHello.java
[codesyntax lang="java" lines="normal"]
package org.suren.littlebird;

/**
 * @author suren
 */
public class TestHello implements ITestHelloMXBean
{

	@Override
	public void hello()
	{
		System.out.println("impl hello");
	}

	@Override
	public String getName()
	{
		return "test get name";
	}

}
[/codesyntax]
  • 服务端测试类JmxServerTest.java
[codesyntax lang="java" lines="normal"]
package org.suren.littlebird;
import java.lang.management.ManagementFactory;
import java.rmi.registry.LocateRegistry;
import java.util.HashMap;
import java.util.Map;

import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;
import javax.naming.Context;

/**
 * @author suren
 *
 */
public class JmxServerTest {

    private static final String DOMAIN    = "suren";
    //用jconsole连接的话,会在“MBean”选项卡中多出来下面包名定义的一个节点
    private static final String PACKAGE = "org.suren.littlebird:type=";

    public static void main(String args[]) throws Exception
    {
        LocateRegistry.createRegistry(5006); //用于远程连接的端口
        MBeanServer server = ManagementFactory.getPlatformMBeanServer();

        //注册一个可供调用的Bean对象
        TestHello testHello = new TestHello();
        ObjectName testHelloObjName = new ObjectName(PACKAGE + "TestHello");
        server.registerMBean(testHello, testHelloObjName);

        //注册一个可供远程连接的Bean对象
        JMXServiceURL serverUrl = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://127.0.0.1:5006/"+DOMAIN);
        Map<String, String> env = new HashMap<String, String>();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.rmi.registry.RegistryContextFactory");
        JMXConnectorServer connectorServer = JMXConnectorServerFactory.newJMXConnectorServer(serverUrl,env, server);
        server.registerMBean(connectorServer, new ObjectName(PACKAGE + "JMXConnectorServer"));

        //启动服务,这个start动作也可以通过jconsole来调用
        connectorServer.start();
    }
}
[/codesyntax]
  • 用于测试服务连接的客户端类JmxClientTest.java
[codesyntax lang="java" lines="normal"]
package org.suren.littlebird;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

/**
 * @author suren
 *
 */
public class JmxClientTest
{

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception
    {
        String hostName = "127.0.0.1"; //发布JMX服务的地址
        int portNum = 5006; //发布服务的端口

        JMXServiceURL u = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://"
                + hostName + ":" + portNum + "/suren");

        Map<String, Object> auth = new HashMap<String, Object>();
        //认证所需要的用户信息
        auth.put(JMXConnector.CREDENTIALS, new String[]{ "controlRole", "123" });

        JMXConnector jmxConnector = JMXConnectorFactory.connect(u, auth);
        MBeanServerConnection connection = jmxConnector.getMBeanServerConnection();

        Set<ObjectInstance> beans = connection.queryMBeans(null, null);
        for(ObjectInstance objInstance : beans)
        {
            ObjectName mBeanName = objInstance.getObjectName();
            MBeanInfo mbeanInfo = connection.getMBeanInfo(mBeanName);

            System.out.println(Arrays.toString(mbeanInfo.getOperations()));
        }
    }
}
[/codesyntax] tomcat对我发布的可能是jmxrmi,要访问的uri为service:jmx:rmi:///jndi/rmi://localhost:5006/jmxrmi
  • Java认证配置
找到配置文件:$JAVA_HOME\jre\lib\management\jmxremote.password 添加如下配置: suren suren 然后修改jmxremote.password的权限为其他用户没有权限,chmod 700 jmxremote.password 找到配置文件:$JAVA_HOME\jre\lib\management\jmxremote.access suren   readwrite \ create javax.management.monitor.*,javax.management.timer.* \ unregister
  • 启动远程服务
如果要通过远程(IP地址+端口)来访问的话,需要在运行时加入以下参数(如何添加参数可以在本站搜索): -Dcom.sun.management.jmxremote.port=5006 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true -Djava.rmi.server.hostname=10.0.32.35  

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