自动动手写原生态jmx，MbeanInfo，invoke
使用jmx的东东主要包括下面几个步骤了：
发布jmxServer。
注册jmxBean到MBeanServer上。
使用连接jmx的client工具来连接jmxServer。
一：前言
MBeanServer以及连接MBean的Client多的数不清。这里我就挑选一种经常会用到的方式来，
本片文章主要还是为下篇 “JBOSS里使用jmx来进行监控” 做好铺垫。
MBeanServer就采用jdk自带的MBeanServer来实现。
client采用jconsole来连接，其它的client原理都类似。
只有server上有一些些区别。
二：发布一个jmxServer
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
因为要采用修改vm参数的方式来运行MBeanServer所以传统的MBeanServerFactory.createMBeanServer();
需要进行修改。
三：创建自己的MBean，MBeanInfo并同时实现invoke，能够让jconsole里调用方法
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.DynamicMBean;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanConstructorInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanOperationInfo;
import javax.management.ReflectionException;
import javax.management.modelmbean.ModelMBeanAttributeInfo;
import javax.management.modelmbean.ModelMBeanOperationInfo;
/**
* @author guoliang
* @version 创建时间：2010-11-13 下午11:22:05 类说明
*/
public class MyMBean implements DynamicMBean {
private String testField = "initial field value";
public String getTestField() {
return testField;
}
public void setTestField(String testField) {
this.testField = testField;
}
public String testMethod(String from) {
System.out.println("hello world" + from);
return "hello world" + from;
}
@Override
public Object getAttribute(String attribute) throws AttributeNotFoundException, MBeanException, ReflectionException {
/**
* 属性操作在这里进行，invoke
*/
Class cls = this.getClass();
try {
String methodName = getMethodNameByField(attribute);
Method attributeGet = cls.getMethod("get" + methodName, null);
return attributeGet.invoke(this, null);
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
private String getMethodNameByField(String attribute) {
String methodName = attribute.substring(0, 1).toUpperCase() + attribute.substring(1, attribute.length());
return methodName;
}
@Override
public AttributeList getAttributes(String[] attributes) {
// TODO Auto-generated method stub
return null;
}
@Override
public MBeanInfo getMBeanInfo() {
// TODO Auto-generated method stub
try {
Class cls = this.getClass();
Method attributeGet = cls.getMethod("getTestField", null);
Method attributeSet = cls.getMethod("setTestField", new Class[] { String.class });
ModelMBeanAttributeInfo attribute = new ModelMBeanAttributeInfo("testField", "description of field",
attributeGet, attributeSet);
Method m = cls.getMethod("testMethod", new Class[] { String.class });
/**
* 添加一个mbean中的操作，用ModelMBeanOperationInfo来实现。
*/
ModelMBeanOperationInfo testMethod = new ModelMBeanOperationInfo("testMethod", m);
MBeanConstructorInfo mBeanConstructorInfo = new MBeanConstructorInfo("Constructor for ServerMonitor", cls
.getConstructor(null));
MBeanInfo info = new MBeanInfo(cls.getName(), "my mbean server", new MBeanAttributeInfo[] { attribute },
new MBeanConstructorInfo[] { mBeanConstructorInfo }, new MBeanOperationInfo[] { testMethod }, null);
System.out.println(info.getClassName() + this.hashCode());
return info;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
public Object invoke(String actionName, Object[] params, String[] signature) throws MBeanException,
ReflectionException {
/**
* 这里用来处理jconsole里点击方法按钮调用后的操作，反射invoke过来。
*/
System.out.println("invoking...." + actionName + "[]" + Arrays.toString(params));
Class[] paraClass = new Class[params.length];
for (int i = 0; i < params.length; i++) {
paraClass[i] = params[i].getClass();
}
try {
Method m = this.getClass().getMethod(actionName, paraClass);
return m.invoke(this, params);
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
public void setAttribute(Attribute attribute) throws AttributeNotFoundException, InvalidAttributeValueException,
MBeanException, ReflectionException {
/**
* 属性操作在这里进行，invoke
*/
Class cls = this.getClass();
try {
String methodName = getMethodNameByField(attribute.getName());
Method attributeSet = cls.getMethod("set" + methodName, new Class[] { attribute.getValue()
.getClass() });
attributeSet.invoke(this, attribute.getValue());
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public AttributeList setAttributes(AttributeList attributes) {
return null;
}
}
四：注册MBean：
public class MyMBeanServer {
public static void main(String[] args) {
// MBeanServer server = MBeanServerFactory.createMBeanServer();
MBeanServer server = ManagementFactory.getPlatformMBeanServer();
try {
ObjectName helloName = new ObjectName("beans:name=MyMbean");
server.registerMBean(new MyMBean(), helloName);
Thread.sleep(Integer.MAX_VALUE);
} catch (InstanceAlreadyExistsException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MBeanRegistrationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NotCompliantMBeanException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MalformedObjectNameException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NullPointerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
五：运行本程序。
要想在jconsole里能看到本MBeanServer，还需要在启动的run里面加些参数，eclipse里面的为： 
启动过后，cmd命令行启动 jconsole
选中本地的Main函数。
在mbean栏目可以看到已经发布的MBean。
ok！比较简单的了解下。
原生态的果然比较麻烦。不这样搞我都不知道内部是个啥东东。