How to add an object in JNDI when a server starts?

Question

I have an integration app. The app contains EJB project. The project contains EJB which reads data from LDAP.
My first version of EJB contains the following code:
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, strProvider);
env.put(Context.SECURITY_AUTHENTICATION, strAuth); env.put(Context.SECURITY_PRINCIPAL,strPrincipal); env.put(Context.SECURITY_CREDENTIALS,strCredentials);
DirContext dirCtx = new InitialDirContext(env); // exception
All connection properties are hardcoded and it is not a good practice.
Also I can put those properties into deployment descriptor. But I am going to have some EJBs and each EJB has to have those properties into descriptors. It is not useful.
My idea: I would like to have whatever object which is called automatically when a server starts; this object creates InitialDirContext and put the context into JNDI. All EJBs lookup the context by a name. But I don't know how to do that.
And another question: how to change connection properties dynamically? My idea is putting the properties in XML Cache. And my object (which creates InitialDirContext) reads the properties from XML Cache. Can I handle a message that my properties in XML Cache have been changed and in this cases my object reads new properties and calls rebind() to update InitialDirContext?
Thanks,
Ivan

Answer 1

To bind an object into the JNDI tree check the documentation here:
http://e-docs.bea.com/wls/docs81/jndi/jndi.html#475702
If this is to be used by all your applications that you deploy on the server check out the startup/shutdown class documentation here:
http://edocs.bea.com/wls/docs81/ConsoleHelp/startup_shutdown.html
Cheers
IV