java之JMX 

有关JMX的定义和架构就不具体解释了。见百度百科：

url=6QzGGEqphTmpft3ll5mXmDNVRdvLRZhkvGaqAWyO6EliwrHeIwt5bdMd188iMlzylxoxr7gRbtIWn2NQODBLZa

代码实例：

与创建一个普通的bean没什么差别：

package com.doctor.java.jmx;/** * @author sdcuike * * @time 2016年2月9日 下午9:47:04 *  * @see http://www.journaldev.com/1352/what-is-jmx-mbean-jconsole-tutorial *      The interface name must end with MBean */public interface SystemConfigMBean {    public void setThreadCount(int noOfThreads);    public int getThreadCount();    public void setSchemaName(String schemaName);    public String getSchemaName();    // any method starting with get and set are considered    // as attributes getter and setter methods, so I am    // using do* for operation.    public String doConfig();}

package com.doctor.java.jmx;/** * @author sdcuike * * @time 2016年2月9日 下午9:51:53 */public class SystemConfig implements SystemConfigMBean {    private int threadCount;    private String schemaName;    public SystemConfig(int threadCount, String schemaName) {        this.threadCount = threadCount;        this.schemaName = schemaName;    }    @Override    public void setThreadCount(int noOfThreads) {        this.threadCount = noOfThreads;    }    @Override    public int getThreadCount() {        return threadCount;    }    @Override    public void setSchemaName(String schemaName) {        this.schemaName = schemaName;    }    @Override    public String getSchemaName() {        return schemaName;    }    @Override    public String doConfig() {        return "No of Threads=" + this.threadCount + " and DB Schema Name=" + this.schemaName;    }}

然后我们创建一个測试样例：

package com.doctor.java.jmx;import java.lang.management.ManagementFactory;import java.util.concurrent.TimeUnit;import javax.management.InstanceAlreadyExistsException;import javax.management.MBeanRegistrationException;import javax.management.MBeanServer;import javax.management.MalformedObjectNameException;import javax.management.NotCompliantMBeanException;import javax.management.ObjectName;/** * @author sdcuike * * @time 2016年2月9日 下午9:56:27 */public class SystemConfigManagement {    private static final int DEFAULT_NO_THREADS = 10;    private static final String DEFAULT_SCHEMA = "default";    public static void main(String[] args) throws MalformedObjectNameException, InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException, InterruptedException {        // Get the MBean server        MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();        // register the MBean        SystemConfig systemConfig = new SystemConfig(DEFAULT_NO_THREADS, DEFAULT_SCHEMA);        ObjectName objectName = new ObjectName("com.doctor.java.jmx:type=SystemConfig");        mBeanServer.registerMBean(systemConfig, objectName);        do {            TimeUnit.SECONDS.sleep(3);            System.out.println("Thread Count=" + systemConfig.getThreadCount() + ":::Schema Name=" + systemConfig.getSchemaName());        } while (systemConfig.getThreadCount() != 0);    }}

执行：

执行的时候，我们必须启用虚拟机选项-Dcom.sun.management.jmxremote

执行如图：

如今我们用java工具jconsole改动变量：

改动变量值：

运行改动：

看看我们执行的程序输出：

是不是改动后的属性生效了。