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From "V. Cekvenich" <baseb...@newsguy.com>
Subject Re: Enterprise Java Beans (EJB)
Date Thu, 15 Aug 2002 15:11:42 GMT
Consider draping a DAO around your persistence.
This way you can replace EJB with JDO or RowSet, should you need to
Ex DAO interface:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/basicportal/src_05d/basicPortal/src/org/apache/commons/DAO/BasicDAO.java?rev=1.1.1.1&content-type=text/vnd.viewcvs-markup

I found a RowSet implementation of DAO works better than EJB.

v.

Ned Wolpert wrote:
> EJB provides a way to easily encapsulate business logic and reduce
> complexity by moving some difficult functionality/designs into
> deployment instead of development. Transaction requirements defined in
> the deployment of the EJB beans as opposed to part of the development of
> the EJB beans. (And they are easy to migrate/scale to many computers
> based on deployment configuration, again, making that task easier for
> developers since the programmer does not need to do anything special to
> achieve this.
> 
> Session beans contain the business logic (Servlets call them)
> Entity beans persist the info to the database. (Session beans call them)
> Message beans respond to JMS queues/topics.
> 
> In reality, EJB is simply another design pattern... one that was
> over-hyped by the vendors, but can provide flexibility needed in some
> cases.
> 
> On Wed, 2002-08-14 at 22:34, Josh wrote:
> 
>>Don't suppose anybody can send me a pointer as to what EJB and Jboss
>>actually achieve? All i managed to glean from their website were some pretty
>>3d variations on the usual "our product in the middle and some arrows"
>>diagrams.
>>
>>-Josh
>>
>>"Rimmer, real dumplings, proper dumplings when they're properly
>>  cooked to perfection, proper dumplings, should not bounce."
>>
>>----- Original Message -----
>>From: "Nikola Milutinovic" <Nikola.Milutinovic@ev.co.yu>
>>To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
>>Sent: Thursday, August 15, 2002 3:31 PM
>>Subject: Re: Enterprise Java Beans (EJB)
>>
>>
>>
>>>>Does Tomcat support EJB?.....
>>>
>>>No, it is not the task of Tomcat.
>>>
>>>
>>>>if not, is there a project to migrate tomcat to support EJB?... it will
>>>
>>be
>>
>>>>a very nice feature...
>>>
>>>Other servers, like JBoss, are EJB containers, Tomcat can
>>
>>connect/integrate with them. There is a version of JBoss that comes bundled
>>with Tomcat. Take a look at http://www.jboss.org/
>>
>>>Nix.
>>>
>>
>>
>>--
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>>



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