Hi all,
Apologies again for a non-Orion specific post, but I think these issues are
something that most of us have run into.
It seems to me that EJB brings a lot of overhead, both from a development
perspective and from a technical perspective. From a performance
standpoint, I'm guessing that a call to an EJB would be slower than directly
calling a bean/class to do the work.
Here's what I understand about EJB strengths:
- EJBs allow me to handle transactions among objects.
This is true; however, I can also accomplish this at a database level, which
I assume will be a lot faster. EJB does give me the choice though.
- EJBs allow me to distribute the load across multiple servers -- ie one
server for JSP, one for EJB, and one for database work.
This is useful, however, I think a site would see better performance (and
reliability) with one database server, and two web servers running the same
JSP/bean application with load balancing between the two.
- EJBs allow me to reuse the exact same business objects from different
clients (ie. an Applet front end, and a servlet front end)
While this is useful, there are many systems for which this just isn't an
issue.
- EJBs allow me to do database connection and object pooling
DB pooling works for beans the same as for EJBs, and writing your own object
pooling is not very difficult.
Anything else?
I think everyone agrees that separating user interface code (ie JSP/HTML)
from business logic is a good thing. Putting business logic in beans is a
very straightforward process, and you can easily focus on the busines
problem, rather than writing interfaces, coding XML config files and
deploying code. EJB seems to make development much more of a chore.
Please not that I am not against EJB, and I recognize that choice is good;
I'm just not convinced it makes sense for the majority of web application
development work out there.
Comments? What are people using, and what issues have you run into?
Darren.
--
Darren Gibbons [EMAIL PROTECTED]
OpenRoad Communications ph: 604.681.0516
Internet Application Development fax: 604.681.0916
Vancouver, B.C. http://www.openroad.ca
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Frank Apap
> Sent: Tuesday, February 15, 2000 3:10 PM
> To: Orion-Interest
> Subject: Some Advice Requested.
>
>
> This mail is semi-OT. But here it goes. I have been using orion for
> learning purposes and what not. But I am planning with some friends to
> build a pretty large scale ecommerce site. We are going to need to handle
> pretty large amounts of hits, and frequent db access with semi large db's.
>
> Could someone let me know their opinions on how orion can handle
> this? Also
> any examples of sites running orion would be helpful.
>
> Beyond the webserver choice is my choice of wether or not to use EJB. Has
> any type of benchmarking been done showing how EJB compares to
> regular JDBC
> connections to db's?
>
> And finally, if I was to go with EJB, do you feel hSql is good
> enough to run
> a business off of? If not what would you recommend.
>
> Thank you for your time.
>
>
> - Frank Apap
>
>
