Spring使用JMX

在Spring 中使用 JMX 要使用 ManagedResource ManagedAttribute 等注解来描述

 

例子演示

 

package cn.shendu.springbootlesson17.jmx;     import org.springframework.jmx.export.annotation.ManagedAttribute; import org.springframework.jmx.export.annotation.ManagedResource; import org.springframework.stereotype.Component;   @ManagedResource( objectName = "cn.shendu.springbootlesson17.jmx:type=SimpleBean", description = "这是一个简单的Bean,被spring托管" ) @Component public class SimpleBean { private Long id; private String name; private Integer value;   @ManagedAttribute(description = "ID 属性") public Long getId() { return id; }   public void setId(Long id) { this.id = id; }   @ManagedAttribute(description = "name 属性") public String getName() { return name; }   public void setName(String name) { this.name = name; }   public Integer getValue() { return value; }   public void setValue(Integer value) { this.value = value; }   @Override public String toString() { return "SimpleBean{" + "id=" + id + ", name='" + name + '\'' + ", value=" + value + '}'; } }

 

 

结果演示

 

 

 

 

源码分析

 

spring 实现 MBean 要实现 此接口

@Target(ElementType.TYPE) @Retention(RetentionPolicy.RUNTIME) @Inherited @Documented public @interface ManagedResource

被 AnnotationJmxAttributeSource 获取并初始化 ManagedResource

AnnotationJmxAttributeSource 下的   @Override public org.springframework.jmx.export.metadata.ManagedResource getManagedResource(Class<?> beanClass) throws InvalidMetadataException { ManagedResource ann = AnnotationUtils.findAnnotation(beanClass, ManagedResource.class); return managedResource; }

AnnotationJmxAttributeSource 被 MetadataNamingStrategy初始化

MetadataNamingStrategy 下的   public MetadataNamingStrategy(JmxAttributeSource attributeSource) { Assert.notNull(attributeSource, "JmxAttributeSource must not be null"); this.attributeSource = attributeSource; }

AnnotationMBeanExporter初始化 metadataNamingStrategy

AnnotationMBeanExporter 下的   private final MetadataNamingStrategy metadataNamingStrategy = new MetadataNamingStrategy(this.annotationSource);

AnnotationMBeanExporter 注册 MBean

MBeanExporter  下 的 doRegister(mbean, objectName); registeredBean = this.server.registerMBean(mbean, objectName);

 

 

大概的调用 链是

@interface ManagedResource

被

-- > AnnotationJmxAttributeSource impl JmxAttributeSource : getManagedResource 获取

--> MetadataNamingStrategy : MetadataNamingStrategy(JmxAttributeSource attributeSource)

--> AnnotationMBeanExporter ext MBeanExporter : MetadataNamingStrategy metadataNamingStrategy = new MetadataNamingStrategy(this.annotationSource)

--> MBeanExporter : doRegister --> this.server.registerMBean(mbean, objectName)