global parameter for EJBs

[Yan Zhou]

Hi,

In the deployment descriptor, where would I store database lookup names (JNDI name) for all EJBs?

I understand that each EJB has a resource-ref entry in DD which it can define resource JNDI name, but if all my EJBs point to the same Database, there ought to be a way globally defining that for ALL ejbs. I just do not know where that is in the DD.

Thanks.
Yan

[Jeanne Boyarsky]

Yan,
As you know, you define the datasource on the server. So the real database info is in one place. As far as I know, you need to define the resource reference repeatedly though. In a way this makes sense because different beans could refer to the same datasource in different ways.

[Saulius Sinkunas]

At first you should declare reference-ref in your DD. You put some logic resource name. For example 'jdbc/SystemDataSource'. When you deploy EJBs into some application server, you must have vendor-specific descriptor file (in JBoss it is 'jboss.xml'), where you must define exactly what 'jdbc/SystemDataSource' means - to what resources it refferers. In jboss.xml you can write it in 'resource-managers' section. For example:

 
  <resource-managers>
    <resource-manager>
      <res-name>mail/MailSource</res-name>
      <res-jndi-name>java:/mail/MailSource</res-jndi-name>
    </resource-manager>
    <resource-manager>
      <res-name>jdbc/SystemDataSource</res-name>
      <res-jndi-name>java:/jdbc/SystemDataSource</res-jndi-name>
    </resource-manager>
  <resource-managers>