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From martin.coo...@tumbleweed.com
Subject Re: Query Caching
Date Sat, 29 Sep 2001 02:05:23 GMT
Well, OK, so this got me curious, since I've been thinking along the same
lines as Geoff. I just finished going through the presentation on the
Fusebox site, and have a couple of questions, if you don't mind.

It would seem that you must be using DB tags, etc., to implement your
Fuseactions. The index.cfm would appear to be the controller, and the dsp_*
would appear to be the view, so I assume that the act_* corresponds to the
model. Is this correct?

The front page of the Fusebox web site states that JSP will be supported in
a future version of the architecture, yet you are obviously using JSP today.
What is the real story here?

Looking at some of the examples in the presentation, at first glance it
seems that a JSP version of Fusebox could be achieved largely by a Fusebox
taglib. Is this in fact what is happening?

Thanks!

--
Martin Cooper


----- Original Message -----
From: "Stacy Young" <Stacy.Young@sfcommerce.com>
To: <taglibs-user@jakarta.apache.org>
Sent: Friday, September 28, 2001 4:46 PM
Subject: RE: Query Caching


> Breaks MVC? Not mine! (Fusebox)
>
>
> -----Original Message-----
> From: Geoff Lane [ mailto:glane@inclusion.net
> <mailto:glane@inclusion.net> ]
> Sent: Friday, September 28, 2001 6:52 PM
> To: taglibs-user@jakarta.apache.org
> Subject: Re: Query Caching
>
>
> Slightly off topic - but I've noticed A LOT of the traffic on this list
> is about the DB Tag related stuff. Am I the only one who thinks that the
> whole idea of DB tags (for anything other than a very trivial site) is
> really a Bad Idea?
>
> It just seems to me that the domain of storage and retrieval lies way
> outside the domain of display. I'm willing to hear opinions on why
> people use these - but they totally break MVC (which not everyone cares
> about I admit).
>
> And - if the queries where being done in regular Java and only being
> accessed from Tag Labraries - then adding a layer of caching with a
> WeakHashmap or something would be rather trivial - then you'd just have
> a little penalty on a cache miss of having to do the query and add the
> value back into the cache.
>
> On that note - you might be able to sub class the DB Tags to have the
> caching done based on the Query and some parameters passed in.
> Basically, you'd need a singleton instance of the Cache class so that
> all the tags could reference the same object (guess you'd need to do
> some synchronizing on the object whenever you updated the cache). Not
> sure if singletons get GCed - since they keep a reference to an instance
> of themselves - one for someone who knows a lot more about the details
> of the VM than me.
>
> Maybe a starting point at least . . .
>
> On Fri, 2001-09-28 at 16:58, Stacy Young wrote:
> > Is there a taglib that supports query caching? Say for isntance I'm
> > using a SQL Taglib to execute a database query, I'd like to hold the
> > results in memory for X amount of time so subsequent queries of the
> > same "id" are pulled from memory and not another trip to the DB.
> >
> > Thanks!
> >
> > Stacy Young
> > Surefire Commerce
> > tel: 514-380-2700 ext 3234
> > http://www.surefirecommerce.com <http://www.surefirecommerce.com>  <
> http://www.surefirecommerce.com <http://www.surefirecommerce.com> >
> >
> > "It all started with a Mouse." -Walt Disney
> >
> --
> Geoff Lane <glane@inclusion.net>
> Ph: (773) 972-7136
> PGP Key: http://www.frognet.net/~glane/key.html
> <http://www.frognet.net/~glane/key.html>
>
>



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