Comments on: Global state in Web Applications: Catalyst’s stash.

By: dima

dima — Sat, 23 Jan 2010 06:43:41 +0000

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By: Aaron Trevena

Aaron Trevena — Fri, 10 Jul 2009 10:24:52 +0000

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By: Ash Berlin

Ash Berlin — Fri, 10 Jul 2009 10:15:11 +0000

To whoever claims to be a 'Programmer': > Catalyst? State of the art? ... response to RoR. The first development release of Catalyst was on 2005-01-28, which while it was a few months after the first relase of Rails, was certainly well before Rails got popular, so calling Catalyst a response to RoR is just silly. Update: ash and lathos on #london.pm also discussed that Cat itself was a fork of Maypole (originally called Apache::MVC), first released 6 months before RoR's first release.

By: Programmer

Programmer — Thu, 09 Jul 2009 14:51:12 +0000

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By: Chris Eidhof

Chris Eidhof — Fri, 05 Jun 2009 08:02:48 +0000

There are frameworks like Seaside which allow you to store state and build continuations. Also, another example is Arc (a language by Paul Graham). I'm working on something similar for Haskell, the code is currently very alpha though. It's at http://github.com/chriseidhof/thesis/

By: Greg

Greg — Fri, 05 Jun 2009 00:11:39 +0000

> I'm especially interested in learning about how strongly-typed FP stacks (HAppS?) confront this stuff. I can't speak for all happstack users, but my usual solution for this kind of global state is a state monad wrapping IO; if you want truly global state, your state record holds an MVar, if you want per-request data your state record holds some other value which gets discarded at the end of the computation.