Fwd: Re: [Glorp-development] Sharing of readonly data

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Date: Wed, 13 Dec 2006 09:54:30 -0500
To: "Mark Plas" <[hidden email]>,
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From: Alan Knight <[hidden email]>
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Subject: Re: [Glorp-development] Sharing of readonly data
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It would be possible to manually put add those to the cache in other sessions when initializing them. Something like
readOnlyObjects do: [:each
    (targetSession cacheForClass: each class)
        at: each id
         ifAbsentPut: [each]].

(There actually isn't an at:put: on caches, thus the ifAbsentPut:)

My thinking on this, although not fully fleshed out, is to add the ability to have main and subordinate sessions (perhaps with better names). A main session would be a normal one, with a database connection. A subordinate session would get its objects from the main session. For objects designated read-only, it could share them. For others, it could make copies. This could also be useful in dealing with web applications where you don't want to have a database connection per user. But it's not implemented yet, and I'm still somewhat thinking about the issues.

At 04:51 AM 12/13/2006, Mark Plas wrote:

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Hi,
 
This mail is part of a set of glorp questions I have (see some other mails I've sent recently).
 
The topic I would like to address here is:
 
I have a few tables containing ‘readonly’ data. I would like to read in this data once and reuse (import) it in all my separate Glorp Sessions in the image, so that when a proxy fires, it would no longer try to read it from the database but get it from the session’s cache. Is it possible and allowed to do this ? How would I import these objects from the readonly session into the others ?
 
Thanks,
Mark
 
 
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