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Re: DBIC & deploy

by castaway (Parson)
on Mar 31, 2009 at 06:45 UTC ( #754340=note: print w/replies, xml ) Need Help??

in reply to DBIC & deploy

At which level do you want to find out? DBIx::Class::Schema::Versioned uses this construct:
sub _source_exists { my ($self, $rs) = @_; my $c = eval { $rs->search({ 1, 0 })->count; }; return 0 if $@ || !defined $c; return 1; }
This is called on a $schema object, and passed a plain $resultset object.

Or you could just use Versioned.


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[Corion]: On the upside, I spend a lot of time thinking this weekend about how to actually implement rate limiting for futures, and if things work out, maybe even loading a configuration from an external file makes sense
[Corion]: I've also found some interesting invariants that I have to think/write about more. A simple rate limiter will never change the order of the input, while a limiter that allows for parallel execution will change the order. But my API currently allows for bo
[Corion]: ... for both, and I'm not sure if I want to add the cruft from the parallel API (a token that you need to hold on to while you hold the lock) to the rate limiting API too, to allow seamless up/downgrades, or not.
[Corion]: Also, rate limiting will look great with await: my $token = await $limiter-> limit($hostname); instead of my $f = $limiter->limit( $hostname )->then(sub { my( $token)=@_; ... });

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