MDB questions

[Jordi Penedes]

Hi

I'm new with MDB and with EJB too, and i have some questions. I'm using JBoss4.0

I'm still doing some test, I have a SimpleMessageBean.java that implements MessageDrivenBean, MessageListener, a ejb-jar.xml:

  
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar version="2.1" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee <a href="http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">" target="_blank" rel="nofollow">http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd"></a>
  <display-name>MDB</display-name>
  <enterprise-beans>
    <message-driven>
      <display-name>SimpleMessageBean</display-name>
      <ejb-name>SimpleMessageBean</ejb-name>
      <ejb-class>SimpleMessageBean</ejb-class>
      <messaging-type>javax.jms.MessageListener</messaging-type>
      <transaction-type>Container</transaction-type>
      <activation-config>
            <activation-config-property>
               <activation-config-property-name>destination</activation-config-property-name>
               <activation-config-property-value>queue.Cua1</activation-config-property-value>
            </activation-config-property>
            <activation-config-property>
               <activation-config-property-name>destinationType</activation-config-property-name>
               <activation-config-property-value>javax.jms.Queue</activation-config-property-value>
            </activation-config-property>
            <activation-config-property>
               <activation-config-property-name>acknowledgeMode</activation-config-property-name>
               <activation-config-property-value>Auto-acknowledge</activation-config-property-value>
            </activation-config-property>
            <activation-config-property>
               <activation-config-property-name>messageSelector</activation-config-property-name>
               <activation-config-property-value/>
            </activation-config-property>
      </activation-config>
    </message-driven>
    <message-driven>
      <display-name>SimpleMessageBean2</display-name>
      <ejb-name>SimpleMessageBean2</ejb-name>
      <ejb-class>SimpleMessageBean</ejb-class>
      <messaging-type>javax.jms.MessageListener</messaging-type>
      <transaction-type>Container</transaction-type>
      <activation-config>
            <activation-config-property>
               <activation-config-property-name>destination</activation-config-property-name>
               <activation-config-property-value>queue.Cua2</activation-config-property-value>
            </activation-config-property>
            <activation-config-property>
               <activation-config-property-name>destinationType</activation-config-property-name>
               <activation-config-property-value>javax.jms.Queue</activation-config-property-value>
            </activation-config-property>
            <activation-config-property>
               <activation-config-property-name>acknowledgeMode</activation-config-property-name>
               <activation-config-property-value>Auto-acknowledge</activation-config-property-value>
            </activation-config-property>
            <activation-config-property>
               <activation-config-property-name>messageSelector</activation-config-property-name>
               <activation-config-property-value/>
            </activation-config-property>
      </activation-config>
    </message-driven>
  </enterprise-beans>
  
  <assembly-descriptor>
    <container-transaction>
      <method>
        <ejb-name>SimpleMessageBean</ejb-name>
        <method-name>onMessage</method-name>
        <method-params>
          <method-param>javax.jms.Message</method-param>
        </method-params>
      </method>
      <trans-attribute>Required</trans-attribute>
    </container-transaction>
    <container-transaction>
      <method>
        <ejb-name>SimpleMessageBean2</ejb-name>
        <method-name>onMessage</method-name>
        <method-params>
          <method-param>javax.jms.Message</method-param>
        </method-params>
      </method>
      <trans-attribute>Required</trans-attribute>
    </container-transaction>
   </assembly-descriptor>
</ejb-jar>

and at jboss.xml i define:

  
   <jmx-name>activemq.rar:name=iTests</jmx-name>
   <enterprise-beans>
 
      <message-driven>
         <ejb-name>SimpleMessageBean</ejb-name>
         <resource-adapter-name>activemq-rar-4.1.1.rar</resource-adapter-name>
         <configuration-name>ActiveMQ Message Driven Bean</configuration-name>
      </message-driven>
      <message-driven>
         <ejb-name>SimpleMessageBean2</ejb-name>
         <resource-adapter-name>activemq-rar-4.1.1.rar</resource-adapter-name>
         <configuration-name>ActiveMQ Message Driven Bean</configuration-name>
      </message-driven>
 
   </enterprise-beans>

It's working, i have a MDB for the 2 queues, but is that correct? or may be done different?

My second question is for when i leave the test times..
I will have several queues and that info will be stored somewhere else in a config file. With this config file we will know how many queues will be and the queue names. Can i wait to deploy the mdb until i read that file? or the deployment may be fixed?

thanks

Jordi