the issue for us is that quick maintainability is as important as
performance - the example of mongo query nested callbacks (like in the
tests of node-mongo-native) is just way too messy (and if everyone else
thinks it's fine then I'm in the 1% that don't).
I'll check out common-node - I actually had considered Narwhal but when
I saw all those java libs - yuk! Maybe better for those already in java
environments. I like to keep stuff simple.
On 02/10/2012 01:06 PM, Oleg Podsechin wrote:
but, common-node (and maybe some other libraries) have abstracted
away that callback when you're living in their abstraction by
using fibers under the hood (i'm sure Oleg will pop in any minute
to explain how). the way yield is described for generators does
not lend itself to ever being abstracted to that degree.
Thanks for mentioning Common Node Mikeal. For anyone who wants to
check it out, here's a link: http://olegp.github.com/common-node/
There's nothing too fancy going on. I've just created synchronous
wrappers for all modules that do IO. As a result, no code outside my
library should yield, addressing the interleaving hazard concern that
some have expressed. In fact, I've been meaning to add a mechanism
which detects yields in the application code and displays a warning.
I do mean to make a fork of the library which uses generators once
they're available. The upgrade path should be fairly straightforward
with the yield keyword added before any method that does IO. However,
based on this comment
http://erik.eae.net/archives/2011/12/29/00.00.29/#comment-104393 it
looks like generators won't be in Node for another year or so.
Oleg
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