RAA - attempt

Description

   A thin wrapper for begin + rescue + sleep + retry.

Synopsis

   require 'attempt'

   # Attempt to ftp to some host, trying 3 times with 30 seconds between
   # attempts before finally raising an error.
   #
   attempt(3, 30){
      Net::FTP.open(host, user, passwd){ ... }
   }

   # Or, do things the long way...
   code = Attempt.new{ |a|
      a.tries    = 3
      a.interval = 30
   }

   code.attempt{
      Net::FTP.open(host, user, passwd){ ... }
   }