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WebApplication Domain Object Storage

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Rob Rothwell

WebApplication Domain Object Storage

Hello...

I think this is a very, VERY basic question, but where do most of you actually store your domain objects that your WebApplication views?

Is it usually a singleton object, stored in the class? Is there ever a reason you would want more than one? Multiple users get NEW WebApplications, but they are all using the same copy of the underlying object, right?

Just asking because I am worried I am missing something fundamental!

Rob

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Nicolas Petton

Re: WebApplication Domain Object Storage

Hi Rob,

We usually store them somewhere accessible from the site.
In Scribo for example, an instance of a blog is stored in the
repository, itself stored in the site:

AIDASite>>repository
^self userServices
at: #Repository
ifAbsent:
[self addUserService: (Repository newOnSite: self) named:
#Repository.
^self repository].

Repository>>blog
| blog |
^self otherAt: #blog ifAbsent: [
blog := Blog newOn: self site.
self site urlResolver defaultURL: '/blog.html' forObject: blog.
self otherAt: #blog put: blog.
^blog]

Anyway, adding an object to the urlResolver is enough:

mySite urlResolver addObject: myObject withURL: '/myObject.html'

Nico
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Nicolas Petton
http://nico.bioskop.fr
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Rob Rothwell

Re: WebApplication Domain Object Storage

On Mon, Mar 24, 2008 at 12:19 PM, Nicolas Petton <[hidden email]> wrote:

Hi Rob,

We usually store them somewhere accessible from the site.
In Scribo for example, an instance of a blog is stored in the
repository, itself stored in the site:

Ok...so in your case, each blog is it's own instance of your domain "blog" object...which makes a lot of sense and takes full advantage of the nice url's, etc.

And it looks like I could store those instances by retrieving the WebApplication site with

self session site

And then use the AIDASite userServices Dictionary as a convenient place to store my values. (This would probably tie in nicely with Magma, which gives you a root dictionary object as well).

Thank you...I will definitely be putting this type of information in the Aida Programmers Guide--though I;m not sure which section it would best fit under so someone new to Aida could find it...

Rob

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