JMX notification set up

[mujer_esponja]

Hello,

I am working on a web application, and currently we need some how to know whether a change has been done in some files adn then reload one bean declared in the context. I read about the Sprimg JMX implementation, and I think it could be a good solution.
I am using james mail server, and in the context there was already declared an mbeanserver

<bean id="mbeanserver" class="org.springframework.jmx.support.MBeanServerFactoryBean">
        <property name="locateExistingServerIfPossible" value="true"/>
        <property name="registerWithFactory" value="true"/>
    </bean>

With the exporter

<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter" lazy-init="false">
        <property name="beans">
            <map>
                <entry key="bean:name=stopWordsSearchBean" value-ref="stopWordsSearch"/>
                <entry key="org.apache.james:type=server,name=smtpserver" value-ref="smtpserver"/>
                <entry key="org.apache.james:type=server,name=lmtpserver" value-ref="lmtpserver"/>
                <entry key="org.apache.james:type=server,name=pop3server" value-ref="pop3server"/>
                <entry key="org.apache.james:type=server,name=imapserver" value-ref="imapserver"/>
                <entry key="org.apache.james:type=component,name=domainlist" value-ref="domainlistmanagement"/>
                <entry key="org.apache.james:type=component,name=dnsservice" value-ref="dnsservice"/>
                <entry key="org.apache.james:type=component,name=recipientrewritetable"
                       value-ref="recipientrewritetablemanagement"/>
                <entry key="org.apache.james:type=component,name=usersrepository"
                       value-ref="usersrepositorymanagement"/>
                <entry key="org.apache.james:type=component,name=fetchmail" value-ref="fetchmail"/>
                <entry key="org.apache.james:type=component,name=mailboxmanagement"
                       value-ref="mailboxmanagermanagement"/>
                <entry key="org.apache.james:type=component,component=mailetcontainer,name=mailspooler"
                       value-ref="mailspooler"/>
                <entry key="org.apache.james:type=component,name=mailboxcopier" value-ref="mailboxcopiermanagement"/>
                <entry key="org.apache.james:type=component,name=james23importer"
                       value-ref="james23importermanagement"/>
                <entry key="org.apache.james:type=container,name=logprovider" value-ref="logprovider"/>
            </map>
        </property>
        <property name="assembler">
            <bean class="org.springframework.jmx.export.assembler.InterfaceBasedMBeanInfoAssembler">
                <property name="managedInterfaces"
                          value="the servers"/>
            </bean>
        </property>
        <property name="notificationListenerMappings">
          <map>
            <entry key="stopWordsSearch">     <!-- When the FILE changes, the notification comes -->
              <bean class="project.CreateStopWordsContainerNotificationListener"/> 
            </entry>
          </map>
        </property>
    </bean>

The bean stopWordsSearch is the one I want to reload when I get some notifications. I thought that the easiest way would be to get the notifications via console. So the user that makes the change in the file, write a command in the command line and reload the bean. (The user would be an admin, this solution is only temporal).

Following the documentation, I created the listener:

public class CreateStopWordsContainerNotificationListener implements NotificationListener, NotificationFilter {

    public void handleNotification(Notification notification, Object handback) {
        System.out.println(notification);
        System.out.println(handback);
    }

    public boolean isNotificationEnabled(Notification notification) {
        return AttributeChangeNotification.class.isAssignableFrom(notification.getClass());
    }
}

I would like to know which steps should I follow, I have not much exprience with JMX Spring!!

I get this warn

WARN 13:06:35,035 | org.springframework.jmx.export.MBeanExporter | Bean with key 'bean:name=stopWordsSearchBean' has been registered as an MBean but has no exp
osed attributes or operations

What does it really mean? I can not find anything googling

Thanks in advance