Web service authentication/session management using Axis2

I'm creating a web service using Axis2 where the client will need to login to the service and maintain a session. I'm trying to figure out a good way to do this. I've read the article on the following link:
http://www.developer.com/services/article.php/3620661/Axis2-Session-Management.htm
and it describes 4 main ways of doing this: Request Session Scope, Soap session scope, Transport session scope, and Application scope. However, it doesn't give much detail in actually implementing this. It says to add a parameter to services.xml like this:
<service name="foo" scope=" transportsession">
</service>
but what about the actual code that goes in the server and client to actually handle the login process and verify the username/password in an SQL database on the server? I'm having a lot of trouble finding a good tuturial on this. Can anyone point me in the right direction? I'm also open to other ideas that don't necessarily directly involve Axis2.

Session management for a web service and already answered. Locking.

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