[Haskell-cafe] External system connections

[Felipe Almeida Lessa]

You don't need to do it, it is already done =).  See the pool package
by Michael Snoyman on Hackage [1].  More specifically, see
createPoolCheckAlive [2].

Cheers,

[1] http://hackage.haskell.org/package/pool
[2] http://hackage.haskell.org/packages/archive/pool/0.1.0.2/doc/html/Data-Pool.html#v:createPoolCheckAlive

-- 
Felipe.