EJB 3 Newbie

[Jeffry Kristianto Yanuar]

Hi friends, my name is Jeffry. I'm a newbie in EJB 3 technology.

I have few questions regarding invoking EJB session bean:

Can I invoke session bean through an independent Java swing application without running it inside the application client container ? If I can, how can I do that ?

Can I invoke session bean across the Internet ?

Your help will become a great contribution in my learning experience.

Thanks before


Jeffry Kristianto Yanuar (Java Instructor)
SCJP 5.0 SCJA SCJD

[Jeanne Boyarsky]

Jeffry,
You can definitely call it from the Swing client. I'm not sure about over the internet. I know you can call it from a different machine. I don't know if it has to be on the same network. I think you can do it, but I'm not positive.

The code varies a bit based on your server, but it basically looks like this example.

[Reza Rahman]

Jeffry,

Take a look here: https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html. You may use either DI or look-ups in a Swing based standalone Java SE client.

Remote EJB calls via RMI/JRMP (the default for most application servers and the most performance friendly choice) can be made across the Internet in theory. In practice, you will need to configure RMI HTTP/S tunneling since most routers block RMI ports: http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3954059#3954059. Note, I've never seen anyone trying to invoke EJB across a firewall via HTTP/RMI, so am not sure how it will work in practice. Remoting inside a firewall works very well.

Hope it helps,
Reza

[Jeffry Kristianto Yanuar]

Thanks Reza, actually I am learning EJB using your book titled "EJB 3 in Action". The book is very good. I think you should provide the sample code in Netbenas project. Using Netbeans to build a project is easier than invoking Ant method.



Jeffry Kristianto Yanuar (Java Instructor) SCJP 5.0 SCJA SCJD

[Reza Rahman]

Jeffry,

Thanks for the kind words. If you get a chance, please do consider posting a review on Amazon.com or elsewhere. It really helps us out.

I am going to write on setting up EJB 3/Java EE 5 projects using Eclipse, NetBeans or Maven very soon. I am just very busy, so it is difficult to make time. I wish someone else would do some of it (hint, hint ;-)).

Cheers,
Reza

[Jeffry Kristianto Yanuar]

I'll post a review on Amazon when I have a time, I also very busy cause I need to teach EJB 3 soon. I am a Java Instructor in Java SE, ME, and EE (currently teaching Servlet and JSP).

Thanks for replying and providing very good links. The "EJB 3 in Action" book become a primary contribution in my learning experience


Thanks

Jeffry Kristianto Yanuar (Java Instructor) SCJP 5.0 SCJA SCJD

[Reza Rahman]

Jeffry,

Great! Many thanks...

Reza