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Question about EJBs and JSP/Servlets

Mohit Goyal
Ranch Hand

Joined: Nov 09, 2003
Posts: 65
Is it necessary to know Servlets/JSPs before learning EJB. I m knew to server side Java Programming. I have started learning Servlets but my requirement is to learn EJBs as soon as possible.

Please help me.
james edwin
Ranch Hand

Joined: Nov 22, 2001
Posts: 393
It will help you,if you know in advance(JSP/Servlet) before jumping directly to EJB.But that will allow you in think in broaden vision like what will happen if i can this EJB from servlet...or JSP..

so as far my recommends are concern,i will say study that first.

Regards,

James


Regards,
James
Dale Seng
Ranch Hand

Joined: Mar 22, 2004
Posts: 275
I wouldn't worry too much about servlets and jsp if you are just going for the SCBCD. You can always write your clients in plain-old java, which I find is better for experimentation anyway - there's a lot time-consuming messing around that just isn't there if you write your client test code as a console app.

--Dale--
Kathy Sierra
Cowgirl and Author
Ranch Hand

Joined: Oct 10, 2002
Posts: 1572
You do not need to know much about servlets and JSP before tackling EJB. You should know the very basics, but you can read a few pages online about where servlets and JSPs fit into J2EE and you'll be in good shape. The point of EJB is that it is intended to be used for components that will not know--or care--about the kinds of clients that are accessing them. A bean should never know whether it's clients are servlets or stand-alone Java apps.

So, you should have an overall picture of J2EE, since that is the world in which EJB lives, and because EJB apps typically DO use servlets as clients... BUT... as a component model, beans should be written *without* the web in mind. Writing your beans with the assumption that they'll be called by a web app means that you potentially hurting your reuse and extensibility.

Go ahead and learn EJB even if you don't know servlets and JSPs! There is absolutely NOTHING on the SCBCD exam that requires servlet/JSP knowledge. We deliberately created the exam that way because there are large workgroups where the roles are clearly divided... the EJB developers are NOT necessarily the same people doing the web app development (Servlets and JSPs). Same thing is true with the SCWCD--you aren't required to have explicit knowledge of EJB.

cheers,
Kathy
 
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subject: Question about EJBs and JSP/Servlets