playing with Node.js domains

domains.coffee

domain = require 'domain'

bad = (msg, cb) ->
  if (r = Math.random()) < 0.33
    cb null, msg
  else if r < 0.66
    cb new Error('error via callback')
  else
    throw new Error('error via exception')

domain_main = domain.create()
domain_main.run ->
  # errors via calling this right here right now don't get caught by the domain and cause a crash :(
  # bad 'hello', domain_main.intercept((response) -> console.log response)

  # only errors occuring after this tick get caught by the domain
  setInterval () ->
    bad 'hello', domain_main.intercept((response) -> console.log response)
  , 1000

domain_main.on "error", (error) ->
  console.error error