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From "Joe Barefoot" <Joe.Baref...@motiva.com>
Subject RE: Should I use a persistence layer?
Date Thu, 03 Oct 2002 19:49:07 GMT
Our shop uses Castor, which is good for getting you up and running quickly as it can generate
entity object code from a database schema.  I don't know about simplicity, however...I don't
think any persistence layer is really that simple. :(

peace,
Joe

> -----Original Message-----
> From: Chen, Dean (Zhun) [mailto:Dean.Chen@gs.com]
> Sent: Thursday, October 03, 2002 12:25 PM
> To: 'Struts Users Mailing List'
> Subject: RE: Should I use a persistence layer?
> 
> 
> Thanks for this, what good persistence layers are there? Is 
> there something
> that works with struts and is simple?
> 
> Dean Chen
> 
> 
> 
> 
> -----Original Message-----
> From: Joe Barefoot [mailto:Joe.Barefoot@motiva.com]
> Sent: Thursday, October 03, 2002 2:41 PM
> To: Struts Users Mailing List
> Subject: RE: Should I use a persistence layer?
> 
> 
> Yes.  The standard approach is to only keep in memory results that are
> currently on the page.  Have a persistence layer (either EJB 
> or O/R mapping
> tool, or a combination of the two) "page" the results for 
> you. i.e., you
> give it search criteria, sort criteria, a begin index, and an 
> end index, and
> it gives you back the results.  This solves two problems:  
> The one you are
> encountering with bad results with two different windows, and 
> the memory
> problems associated with very large result sets.
> 
> There are examples of this sort of implementation out there; 
> sorry I can't
> provide links. :(
> 
> peace,
> Joe
> 
> > -----Original Message-----
> > From: Chen, Dean (Zhun) [mailto:Dean.Chen@gs.com]
> > Sent: Thursday, October 03, 2002 10:13 AM
> > To: 'Struts Users Mailing List'
> > Subject: Should I use a persistence layer?
> > 
> > 
> > Hi,
> > 
> > For an web application, is there a way for a user to 
> paginate through
> > (similar to google) a lot of data across multiple browser windows.
> > 
> > The usual way of paginating with session scope works fine. 
> > However, if a
> > user has 2 windows open on the same application. When he/she 
> > queries on one,
> > then queries on another, and then comes back to the first 
> > window and click
> > "Next", he/she will get bad results.
> > 
> > Does this lead to EJB or any other persistence layers?
> > 
> > Thanks,
> > 
> > 
> > Dean Chen
> > 
> > 
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