[Haskell-cafe] Picking an architecture for a Haskell web app

[Bayley, Alistair]

> From: haskell-cafe-bounces at haskell.org 
> [mailto:haskell-cafe-bounces at haskell.org] On Behalf Of Joel Reymont
> 
> I have finished an alpha version of my EasyLanguage [1] to C#  
> compiler and need to deploy it on Amazon EC2/S3.
> 
> My choice seems to boil down to HAppS [2], HOPE [3], or a 
> combination of Ruby/Rails with Lambdabot.
> 
> Lambdabot by itself doesn't offer much apart from robust dynamic  
> loading of Haskell code
> 
> Is my assessment correct? Did I miss anything?

Depends. Did you leave out WASH intentionally?
  http://www.informatik.uni-freiburg.de/~thiemann/WASH/

Note that Adam Peacock recently built a web-app with WASH, so there's a
real live example to eyeball:
  http://www.haskell.org/pipermail/haskell-cafe/2007-April/024127.html
  http://article.gmane.org/gmane.comp.lang.haskell.cafe/21159

Regarding Lambdabot, if dynamic loading is all you're after then you'd
be better off learning how to use hs-plugins and rolling your own. It's
pretty simple. For dynamic-loading-application design ideas, I suggest
reading this Yi paper:
  http://www.cse.unsw.edu.au/~dons/papers/SC05.html

Alistair
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