我的JMX心得 -- Client端

上一篇我们一起来研究了JMX的Server端实现，现在我们再来一起看看怎样来写客户端来连接Server。

 

客户端案例：

 

package study.test.jmx; import java.util.Iterator; import java.util.Set; import javax.management.Attribute; import javax.management.MBeanServerConnection; import javax.management.MBeanServerInvocationHandler; import javax.management.ObjectName; import javax.management.remote.JMXConnector; import javax.management.remote.JMXConnectorFactory; import javax.management.remote.JMXServiceURL; public class HelloWorldClient { /** * @param args */ public static void main(String[] args) { try { // Create an RMI connector client and // connect it to the RMI connector server // echo("/nCreate an RMI connector client and " + "connect it to the RMI connector server"); JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://localhost:1099/TestJMXServer"); JMXConnector jmxc = JMXConnectorFactory.connect(url, null); // Get an MBeanServerConnection // echo("/nGet an MBeanServerConnection"); MBeanServerConnection mbsc = jmxc.getMBeanServerConnection(); // Get domains from MBeanServer // echo("/nDomains:"); String domains[] = mbsc.getDomains(); for (int i = 0; i < domains.length; i++) { echo("/tDomain[" + i + "] = " + domains[i]); } // Get MBean count // echo("/nMBean count = " + mbsc.getMBeanCount()); // Query MBean names // echo("/nQuery MBeanServer MBeans:"); Set names = mbsc.queryNames(null, null); for (Iterator i = names.iterator(); i.hasNext(); ) { echo("/tObjectName = " + (ObjectName) i.next()); } // get MBean obj name // ObjectName stdMBeanName = new ObjectName("TestJMXServer:name=HelloWorld"); // Access MBean // Get attribute in MBean echo("/nName = " + mbsc.getAttribute(stdMBeanName, "Name")); // set attribute value in MBean mbsc.setAttribute(stdMBeanName, new Attribute("Name","小三黑")); // invoke the MBean's method mbsc.invoke(stdMBeanName, "printHello", null, null); mbsc.invoke(stdMBeanName, "printHello", new Object[] { "HelloKity" }, new String[] { String.class.getName() }); // Proxy way to access MBean HelloWorldMBean proxy = (HelloWorldMBean) MBeanServerInvocationHandler.newProxyInstance(mbsc, stdMBeanName, HelloWorldMBean.class, false); echo(proxy.getName()); proxy.setName("帅哥一个"); echo(proxy.getName()); proxy.printHello(); // Close MBeanServer connection // echo("/nClose the connection to the server"); jmxc.close(); echo("/nBye! Bye!"); } catch (Exception e) { e.printStackTrace(); } } private static void echo(String msg) { System.out.println(msg); } }

 

程序里面的注释写的比较明白，这里就不再多说了，让我们一起来看看程序运行的结果：

 

Create an RMI connector client and connect it to the RMI connector server Get an MBeanServerConnection Domains: Domain[0] = TestJMXServer Domain[1] = JMImplementation MBean count = 3 Query MBeanServer MBeans: ObjectName = JMImplementation:type=MBeanServerDelegate ObjectName = TestJMXServer:name=HelloWorld ObjectName = TestJMXServer:name=htmladapter Name = null 小三黑 帅哥一个 Close the connection to the server Bye! Bye!

 

服务器端的运行结果如下：

 

JMXServiceURL: service:jmx:rmi:///jndi/rmi://localhost:1099/TestJMXServer Hello World, 小三黑 Hello , HelloKity Hello World, 帅哥一个