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Re: book about "Expert One on One J2EE Development Without EJB"
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Re: book about "Expert One on One J2EE Development Without EJB"


  • Subject: Re: book about "Expert One on One J2EE Development Without EJB"
  • From: Andrus Adamchik <email@hidden>
  • Date: Sun, 10 Oct 2004 20:31:13 -0400

Hi Kevin,

I've been watching the progress of Spring and the whole lighweight container "movement", and I have a feeling of deja vu all that time. After attending a seminar with Rod Johnson's (the book author) participation, I even thought of writing an article on the irony of the whole subject :-)

My take on it is that yes - J2EE will eventually be like WebObjects, though nobody will admit that:

(1) EJB will be quietly pushed to the side or reimplemented to favor local persistent objects using Object Relational Mapping instead of remote "beans".

(2) Web presentation piece will be done using component approach (mostly JSF, but also Tapestry) instead of JSP/Struts.

(3) The notion of "container" will evolve into something useful to your applications, instead of something that creates unneeded constraints and overhead. This is where "lightweight containers" are showing the way with object factories, inversion of control, etc. Still to me the useful part of a "lightweight container" is not much different from com.webobjects.appserver.WOApplication, only with fewer or no singletons (which is good). I am still cautious about other features that Spring and co. have - AOP, transaction management, etc.

So J2EE is borrowing main WebObjects ideas, providing more heavy and convoluted implementation for them. Lots of good ideas are buried under the weight of the beast. Just take backwards compatibility with all the mistakes made in the past years - this already costs J2EE dearly.


------------------------------ Andrei (aka Andrus) Adamchik Cayenne Object-Relational Framework http://objectstyle.org/cayenne/




On Oct 10, 2004, at 7:43 PM, Kevin Xiaowen Ren wrote:
Hi, all,

Any one read this book?
The author introduced new J2EE architecture "Lightweight Container" architecture.
Something is very similar to our WebObjects architecture, is it means that J2EE should move simply solution like WebObjects?


any comments, thanks,

kevin

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 >book about "Expert One on One J2EE Development Without EJB" (From: Kevin Xiaowen Ren <email@hidden>)

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