JMX之将Spring Bean 输出为带通知的MBean

Spring集成JMX是很简单的，这里通过注解发方式暴露JMX，有的时序我们需要监听JMX属性的改变，下面我们在Spring配置文件中配置监听器。

涉及到三个重要的annotation：@ManagedResource @ManagedAttribute 和 @ManagedOperation。

用途 Commons Attributes属性 JDK 5.0注解 属性/注解类型

将类的所有实例标识为JMX受控资源	ManagedResource	@ManagedResource	Class 类
将方法标识为JMX操作	ManagedOperation	@ManagedOperation	Method方法
将getter或者setter标识为部分JMX属性	ManagedAttribute	@ManagedAttribute	Method (only getters and setters) 方法（仅getters和setters）
定义操作参数说明	ManagedOperationParameter	@ManagedOperationParameter和@ManagedOperationParameters	Method 方法

Parameter	Description	Applies to
ObjectName	Used by MetadataNamingStrategy to determine the ObjectName of a managed resource	ManagedResource
description	Sets the friendly description of the resource, attribute or operation	ManagedResource, ManagedAttribute, ManagedOperation, ManagedOperationParameter
currencyTimeLimit	Sets the value of the currencyTimeLimit descriptor field	ManagedResource, ManagedAttribute
defaultValue	Sets the value of the defaultValue descriptor field	ManagedAttribute
log	Sets the value of the log descriptor field	ManagedResource
logFile	Sets the value of the logFile descriptor field	ManagedResource
persistPolicy	Sets the value of the persistPolicy descriptor field	ManagedResource
persistPeriod	Sets the value of the persistPeriod descriptor field	ManagedResource
persistLocation	Sets the value of the persistLocation descriptor field	ManagedResource
persistName	Sets the value of the persistName descriptor field	ManagedResource
name	Sets the display name of an operation parameter	ManagedOperationParameter
index	Sets the index of an operation parameter	ManagedOperationParameter

 AttributeChangeNotification，这个类是javax.management.Notification的子类，而javax.management.Notification

这个类又是java.util.EventObject的子类，由此可以证实上边所说的，JMX通知机制使用了观察者设计模式.

javax.management