Spring MBeanExporter - 为 MBean 命名
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Spring MBeanExporter - giving name to MBean
提问by Ivan Sopov
I'm trying to run a simple application with jmx-exported method. I do it like (spring-context and cglib for "@Configuration" are in classpath):
我正在尝试使用 jmx 导出方法运行一个简单的应用程序。我这样做（“@Configuration”的spring-context和cglib在类路径中）：
package com.sopovs.moradanen.jmx;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jmx.export.MBeanExporter;
import org.springframework.stereotype.Component;
@Component
@Configuration
public class SpringJmxTest {
public static void main(String[] args) {
new AnnotationConfigApplicationContext("com.sopovs.moradanen.jmx");
while (true) {
Thread.yield();
}
}
@Bean
public MBeanExporter createJmxExporter() {
return new MBeanExporter();
}
public interface FooBarMBean {
public String hello();
}
@Component
public static class FooBar implements FooBarMBean {
@Override
public String hello() {
return "Hello";
}
}
}
However when I run it I get:javax.management.MalformedObjectNameException: Key properties cannot be empty. I tried to debug and solved it with:
但是，当我运行它时，我得到：javax.management.MalformedObjectNameException：Key 属性不能为空。我试图调试并解决它：
@Component
public static class FooBar implements FooBarMBean, SelfNaming {
@Override
public String hello() {
return "Hello";
}
@Override
public ObjectName getObjectName() throws MalformedObjectNameException {
return new ObjectName("fooBar:name=" + getClass().getName());
}
}
But is there a better way to supply a name for MBean?
但是有没有更好的方法来为 MBean 提供名称？
回答by Donatello
You can use the descriptions annotations provided by Spring Context @Managed* :
您可以使用 Spring Context @Managed* 提供的描述注释：
To do this, you must NOT implements the interface with "MBean" or "MXBean" suffix, neither SelfNaming. Then, the bean will be detected as a standard spring "managed bean" when MBeanExporter will registerBeanInstance(..), and will be converted to a ModelMBean using all spring annotations, including descriptions of attributes, operations, parameters, etc..
为此，您不得实现带有“MBean”或“MXBean”后缀的接口，也不能实现 SelfNaming。然后，当 MBeanExporter 将 registerBeanInstance(..) 时，bean 将被检测为标准 spring “托管 bean”，并将使用所有 spring 注释转换为 ModelMBean，包括属性、操作、参数等的描述。
As a requirement, you should declare in your spring context the MBeanExporterwith AnnotationJmxAttributeSource, MetadataNamingStrategy, and MetadataMBeanInfoAssemblerattributes, which can be simplified like this :
作为一项要求，您应该在 Spring 上下文中声明MBeanExporter和AnnotationJmxAttributeSource、MetadataNamingStrategy和MetadataMBeanInfoAssembler属性，可以像这样简化：
<bean id="mbeanExporter"
class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter" />
or
或者
<context:mbean-export />
And your managed bean should look like this :
您的托管 bean 应如下所示：
@Component("myManagedBean")
@ManagedResource(objectName="your.domain.jmx:name=MyMBean",
description="My MBean goal")
public class AnnotationTestBean {
private int age;
@ManagedAttribute(description="The age attribute", currencyTimeLimit=15)
public int getAge() {
return age;
}
@ManagedOperation(description = "Check permissions for the given activity")
@ManagedOperationParameters( {
@ManagedOperationParameter(name = "activity",
description = "The activity to check")
})
public boolean isAllowedTo(final String activity) {
// impl
}
}
Remember to not implements an MBean interface, which would be a StandardMBean, and SelfNaming interface, which would bypass Spring naming management !
记住不要实现 MBean 接口，这将是 StandardMBean 和 SelfNaming 接口，这将绕过 Spring 命名管理！
回答by Oleg Estekhin
You can use KeyNamingStrategyto define all JMX-related properties inside XML configuration without adding any compile-time dependencies to Spring into the source code of your MBean:
您可以使用KeyNamingStrategy在 XML 配置中定义所有与 JMX 相关的属性，而无需将任何对 Spring 的编译时依赖项添加到 MBean 的源代码中：
<bean class="org.springframework.jmx.export.MBeanExporter" lazy-init="false">
<property name="namingStrategy" ref="namingStrategy"/>
</bean>
<bean id="namingStrategy"
class="org.springframework.jmx.export.naming.KeyNamingStrategy">
<property name="mappings">
<props>
<prop key="someSpringBean">desired.packageName:name=desiredBeanName</prop>
</props>
</property>
</bean>
If you can live with somewhat arbitrary object names, then you can use the IdentityNamingStrategyas a naming strategy for MBeanExporter and minimize the XML configuration event further:
如果您可以使用一些任意的对象名称，那么您可以使用IdentityNamingStrategy作为 MBeanExporter 的命名策略，并进一步最小化 XML 配置事件：
<bean class="org.springframework.jmx.export.MBeanExporter" lazy-init="false">
<property name="namingStrategy" ref="namingStrategy"/>
</bean>
<bean id="namingStrategy"
class="org.springframework.jmx.export.naming.IdentityNamingStrategy"/>
回答by Dave G
Check spring documentation: http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/jmx.htmlsection 22.3.2 explains the JDK 5.0 annotations that are available.
检查 spring 文档：http: //static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/jmx.html 部分 22.3.2 解释了可用的 JDK 5.0 注释。
Section 22.4 explains mechanisms available for object naming.
第 22.4 节解释了可用于对象命名的机制。
