Re: EJB / was Struts and high performance sites

["V. Cekvenich" <vi...@users.sourceforge.net>]

http://www2.theserverside.com/home/thread.jsp?thread_id=16300&article_count=25

I quote from above:
"
The criticism of EJB the author makes confirms what I have been 
suspecting for some time now:
EJBs are evil, and should be avoided at all costs, except in a few cases.
"

also: www.basebeans.com/bad.jsp can give you more info. You can just 
search EJB on google for more.

.V

Taylor, Jason wrote:
> V-- What did you specifically see as a performance problem?  Was it jndi
> lookups, I/O, serialization/deserialization, memory allocation, failover or
> what?  
> 
> I also think they are often mis- or over-used-- I'm interested in the cases
> you ran into.  Do you care to share?
> 
> -JT
> 
> -----Original Message-----
> From: V. Cekvenich [mailto:vicc@users.sourceforge.net]
> Sent: Tuesday, September 24, 2002 4:26 AM
> To: struts-user@jakarta.apache.org
> Subject: EJB / was Struts and high performance sites
> 
> 
> They are hype marketed as such. Most newer developers try them, as I did 
> when I was new, but in production they did not scale, so we removed 
> them. On new sites I skip the writing them part,  since people would 
> only remove them in production. (some management that take EJB to 
> production are so upset that they go to the cached .NET ADO, so I steer 
> my client's clear).
> 
> Read www.basebeans.com/bad.jsp links for other's opinion.
> Some people disagree with them, but I had similar experience.
> 
> V.
> 
> Daniel Joshua wrote:
> 
>>V. Cekvenich,
>>
>>
>>
>>>The slow part is DAO in J2EE (and ADO in .NET). Avoid any EJB, they do
>>>not scale.
>>
>>
>>I though EJBs were designed to allow scalling?
>>
>>
>>Regards,
>>Daniel
>>
>>
>>-----Original Message-----
>>From: news [mailto:news@main.gmane.org]On Behalf Of V. Cekvenich
>>Sent: Tuesday, September 24, 2002 5:56 PM
>>To: struts-user@jakarta.apache.org
>>Subject: Re: Struts and high performance sites
>>
>>
>>Not a high volume of users, and 7 transactions per second? Should fit on
>>a single medium box (if not a laptop) if you do it right.
>>
>>You have to worry about creating objects if you write your own framework
>>(you can put beans in session or requests, and request is better
>>mostly), and then you have 2 projects, your app and a framework, and you
>>won't do better than the Struts team and what about framework bugs?
>>Also, with Struts, my clients are able to write several modules(pages)
>>per day per developers, how's that for  productivity or beating the
>>schedule?
>>Some of the  Struts sites are 50 times more concurrent users I have
>>worked on, no problem.
>>
>>The slow part is DAO in J2EE (and ADO in .NET). Avoid any EJB, they do
>>not scale.
>>
>>Some good choices is RowSet(I do metadata w/ reflection to auto gen SQL
>>updates - RowSet also avoids BO/DTO/VO mapping and GC), Resin, pgSQL,
>>Eclipse or CodeGuide IDE, Linux/KDE and J:Rockit VM or IBM VM (Sun VM
>>and Sun Inc. have issues). Sample good practices code on
>>http://basicPortal.sf.net, FREE!
>>
>>(If you have a large app or large # users, let a mentor help. many are
>>on this list, it is cost effective, but not because of Struts only)
>>
>>V.
>>Struts Mentor
>>917 345 1445 /vic@baseBeans.com
>>("Mentor's helps you do it faster/cheaper)
>>
>>
>>David Zimmerman wrote:
>>
>>
>>>Hi,
>>>we are building a webshop for a site with a high volume of users, approx.
>>
>>800 concurrent users and 25k transactions per hour. We are going to use
> 
> J2EE
> 
>>as the ground platform. I am now considering some design choices where
> 
> using
> 
>>Struts is one of them. However I have some questions regarding the
>>performance of Struts. I know this issue has been up many times before but
> 
> I
> 
>>have never been able to find any satisfying answers, so...
>>
>>
>>>What, if any, overhead does the Struts controller generate? This question
>>
>>must of course be seen in the context of writing your own controller or
>>using any other framework. However, what is Struts overhead?
>>
>>
>>>What overhead does the use of form beans generate (in the sense of objects
>>
>>created, memory use, the use of reflection, speed)
>>
>>
>>>Custom tags (Struts' or other). Would they be applicable in a case like
>>
>>this? Wouldn't there be a massive creation of objects for every request?
>>
>>
>>>Please help me out here! I really want your knowledge on this!
>>>
>>>Regards
>>>David Zimmerman
>>>
>>>
>>>____________________________________________________________
>>>Tired of all the SPAM in your inbox? Switch to LYCOS MAIL PLUS
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>>
>>
>>
>>
>>
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