Hi!
On Wed, Dec 10, 2014 at 12:47:17AM +0100, "Fetchinson ."
<[email protected]> wrote:
> What's the best strategy for some kind of caching of an expensive property?
>
> Let's say I have the following:
>
> class obj( SQLObject ):
> somefield = StringCol( )
> someotherfield = StringCol( )
>
> def _get_expensivestuff( self ):
> # takes a long time
> return result
>
> And if my obj instance is alive for a long time and expensivestuff
> gets accessed many times I'd like to just compute result once, store
> it somewhere (where?) and return it from there.
>
> I'm aware of memoizing the result of a function using a suitable
> decorator but I'm concerned about thread safety and I'm not terribly
> knowledgeable about the internals of sqlobject.
>
> Any ideas would help a lot. Thanks,
> Daniel
I hope you know that SQLObject converts _get_* and _set_* methods to
properties so you shouldn't decorate the methods. Also most caching
decorators are not thread-safe so you'd better implement your own
caching with proper locking.
Oleg.
--
Oleg Broytman http://phdru.name/ [email protected]
Programmers don't die, they just GOSUB without RETURN.
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