我正在尝试编写一个示例JMX应用程序。这是我的MBean类：
package com.pramati.jmx;
@Component
@ManagedResource(objectName="modelMBean:type=simple-calculator",
description="Calculator performing basic arithmetic on integers")
public class SimpleCalculator {
private int operand1;
private int operand2;
public SimpleCalculator() {
System.out.println("SimpleCalculator - MBean created!!");
}
@ManagedOperation(description="Addition operation")
public int add() {
return operand1 + operand2;
}
@ManagedOperation(description="Multiplication operation")
public int multiply() {
return operand1 * operand2;
}
@ManagedOperation(description="Division operation")
@ManagedOperationParameters({
@ManagedOperationParameter(name="operand1", description="Dividend"),
@ManagedOperationParameter(name="operand2", description="Divisor")
})
public int divide(int operand1, int operand2) {
if(operand2 == 0) {
throw new IllegalArgumentException("Can not divide by zero");
}
return operand1 / operand2;
}
@ManagedAttribute
public int getOperand1() {
return operand1;
}
@ManagedAttribute
public void setOperand1(int operand1) {
this.operand1 = operand1;
}
@ManagedAttribute
public int getOperand2() {
return operand2;
}
@ManagedAttribute
public void setOperand2(int operand2) {
this.operand2 = operand2;
}
}
这是来自applicationContext的bean声明：
<context:component-scan base-package="com.pramati.jmx"/>
<bean id="mbeanExporter" class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter"/>
现在当我运行jconsole时，我没有看到我的Mbean。但是当我明确地声明bean时如下：
<bean id="calculator" class="com.pramati.jmx.SimpleCalculator">
<property name="operand1" value="1000"/>
<property name="operand2" value="50"/>
</bean>
<bean id="mbeanExporter" class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter"/>
现在，如果我运行jconsole，我会看到Mbean。为什么我在使用组件扫描时没有注册MBean？
这是我完整的applicationContext：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean id="mbeanExporter" class="org.springframework.jmx.export.annotation.AnnotationMBeanExporter"/>
<context:component-scan base-package="com.pramati.model"/>
<context:component-scan base-package="com.pramati.controller"/>
<context:component-scan base-package="com.pramati.service"/>
<context:component-scan base-package="com.pramati.validator"/>
<context:component-scan base-package="com.pramati.type.converters"/>
<context:component-scan base-package="com.pramati.jmx"/>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="webBindingInitializer">
<bean class="com.pramati.spring.mvc.CustomWebBindingInitializer"/>
</property>
</bean>
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/>
<mvc:interceptors>
<bean class="com.pramati.spring.mvc.LoggingInterceptor"/>
<mvc:interceptor>
<mvc:mapping path="/reservationQuery/**"/>
<bean class="com.pramati.spring.mvc.AuditTimeInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
<bean name="internalresourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
<property name="order" value="#{xmlViewResolver.order+1}"/>
</bean>
<bean name="xmlViewResolver" class="org.springframework.web.servlet.view.XmlViewResolver">
<property name="location" value="/WEB-INF/court-views.xml"/>
<property name="order" value="#{T(org.springframework.core.Ordered).HIGHEST_PRECEDENCE}"/>
</bean>
<bean name="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
<property name="defaultLocale" value="fr_FR"></property>
</bean>
<bean name="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${connection.driverClassName}"/>
<property name="url" value="${connection.url}"/>
<property name="username" value="${connection.username}"/>
<property name="password" value="${connection.password}"/>
<property name="initialSize" value="${connection.initialSize}"/>
<property name="maxActive" value="${connection.maxActive}"/>
</bean>
<context:property-placeholder location="classpath:spring/config.properties"/>
<bean name="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename">
<value>properties/resourceBundle</value>
</property>
</bean>
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="exceptionMappings">
<props>
<prop key="com.pramati.exception.ResourceNotFoundException">
exceptions/resourceNotFound
</prop>
</props>
</property>
<property name="defaultErrorView" value="exceptions/error"/>
</bean>
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean" >
<property name="converters">
<set>
<bean class="com.pramati.type.converters.StringToSportTypeConverter"/>
<bean class="com.pramati.type.converters.StringToDateConverter"/>
<bean class="com.pramati.type.converters.StringToPlayerConverter"/>
</set>
</property>
</bean>
<bean id="defaultReservation" class="com.pramati.model.Reservation">
<property name="courtName" value="Soccer Court #1"/>
<property name="date" value="11-11-2011"/>
<property name="hour" value="15"/>
<property name="player" value="Prasanth,9010107771"/>
<property name="sportType" value="2"></property>
</bean>
</beans>
这是安全上下文：
<beans:beans xmlns="http://www.springframework.org/schema/security"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-3.1.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<beans:bean id="accessDecisionManager" class="org.springframework.security.access.vote.AffirmativeBased">
<beans:property name="decisionVoters">
<beans:list>
<beans:bean class="org.springframework.security.access.vote.RoleVoter">
<beans:property name="rolePrefix" value="ROLE_"/>
</beans:bean>
<beans:bean class="org.springframework.security.access.vote.AuthenticatedVoter"/>
<beans:bean class="com.pramati.spring.mvc.LocalIpVoter"/>
</beans:list>
</beans:property>
</beans:bean>
<http access-decision-manager-ref="accessDecisionManager">
<intercept-url pattern="/app/messageList*" access="ROLE_USER,ROLE_ANONYMOUS"/>
<intercept-url pattern="/app/messagePost*" access="ROLE_USER"/>
<intercept-url pattern="/app/messageDelete*" access="ROLE_ADMIN,IP_LOCAL_HOST"/>
<form-login login-page="/login.jsp" default-target-url="/app/messagePost"
authentication-failure-url="/login.jsp?error=true"/>
<logout logout-success-url="/login.jsp"/>
<remember-me services-alias="rememberMeService" key="springRocks" data-source-ref="dataSource"/>
<!-- <remember-me data-source-ref="dataSource" key="pramati"/> -->
<session-management session-authentication-error-url="/login.jsp?error=alreadyLoggedin" >
<concurrency-control max-sessions="1" error-if-maximum-exceeded="true"
expired-url="/login.jsp?error=alreadyLoggedin"/>
</session-management>
</http>
<beans:bean id="tokenRepository" class="org.springframework.security.web.authentication.rememberme.JdbcTokenRepositoryImpl">
<beans:property name="dataSource" ref="dataSource"/>
<beans:property name="createTableOnStartup" value="false"/>
</beans:bean>
<beans:bean id="rememberMeService" class="org.springframework.security.web.authentication.rememberme.PersistentTokenBasedRememberMeServices">
<beans:property name="key" value="springRocks"/>
<beans:property name="userDetailsService" ref="userDetailsService"/>
<beans:property name="tokenRepository" ref="tokenRepository"/>
<beans:property name="alwaysRemember" value="true"/>
</beans:bean>
<authentication-manager>
<authentication-provider>
<!-- TBD <password-encoder hash="md5"/> -->
<jdbc-user-service id="userDetailsService" data-source-ref="dataSource"
users-by-username-query=
"SELECT username, password, true as enabled
FROM MEMBER
WHERE username=?"
authorities-by-username-query=
"SELECT member.username, role.role as authorities
FROM ROLE role, MEMBER member
WHERE role.member_id=member.id and member.username=?"/>
<!-- <user-service>
<user name="admin" password="password" authorities="ROLE_ADMIN,ROLE_USER"/>
<user name="user" password="password" authorities="ROLE_USER"/>
</user-service> -->
</authentication-provider>
</authentication-manager>
</beans:beans>
答案 0 :(得分：1)
据我所知，@ Component注释表明当上下文：component-scan运行时，此类有资格成为Spring bean。 @ManagedResource注释指示可以将bean导出为JMX MBean。它的objectName属性是可选的，但可用于指定MBean的特定名称。请按以下方式更改@ManagedResource
@ManagedResource(objectName="com.pramati.jmx:name=simplecalculator",
description="Calculator performing basic arithmetic on integers")
我们只是给出Mbean的名称。在这种情况下，它将在'com.pramati.jmx'目录下公开，名称为'simplecalculator'。
添加此行并检查
<context:mbean-export/>
您可以将日志记录选项添加到调试
@ManagedResource(objectName="com.pramati.jmx:name=simplecalculator", description="Calculator performing basic arithmetic on integers", log=true,
logFile="jmx.log")
答案 1 :(得分：1)
启用日志，发现问题在于bean的声明。在组件扫描之前定义了mbeanexporter，因此mbean没有注册。一旦我重新排序它，即首先声明组件扫描然后定义mbeanexporter，mbean将显示在jconsole中。