Sync Experiments with Node and Meteor

gistfile1.coffee

Date.now = -> return new Date().getTime()

if Meteor.isServer
  logs = []

  Meteor.defer ->
    logs.push('setImmediate 1')

  Meteor.setTimeout ->
    logs.push('setTimeout 1')
  , 0

  Meteor.setTimeout ->
    Meteor.defer ->
      logs.push('setImmediate 2')

    Meteor.setTimeout ->
      logs.push('setTimeout 2')
    , 0
  , 0

  Meteor.setTimeout ->
    # commenting out this line
    # changes the order of logs.push being printed
    # logs.push 'before setTimeout 3'
    Meteor.defer ->
      logs.push('setImmediate 3')

    Meteor.setTimeout ->
      logs.push('setTimeout 3')
    , 0
  , 1000

  logs.push 'before long process'

  newDate = Date.now()
  while Date.now() < newDate + 5000
    true
  logs.push 'done long process'


  Meteor.publish "me", ->
    newDate = Date.now()

    Meteor.setTimeout ->
      while Date.now() < newDate + 3000
        truenull
    , 0

    return

  Meteor.methods
    printLogs: ->
      return logs

    longMethod: ->
      # unblock has no effect for same client
      # due to CPU intensive operation
      # does not block meteor main thread
      @unblock()
      newDate = Date.now()
      console.log 'started LM1'
      while Date.now() < newDate + 5000
        true
      return 'done1'

    longMethod2: ->
      @unblock()
      newDate = Date.now()
      console.log 'started LM2'
      asyncFn = (callback) ->
        # Set timout will not block the same client
        # despite having blocking process
        # probably spawns a fiber
        Meteor.setTimeout ->
          while Date.now() < newDate + 5000
            true
          callback null, 'done'
        , 0

      result = do Meteor.wrapAsync(asyncFn)

      console.log 'done2'
      return 'done2'


    longMethod3: ->
      @unblock()
      newDate = Date.now()
      console.log 'started LM3'
      asyncFn = (callback) ->
        # defer will block, unlike setTimeout
        Meteor.defer ->
          while Date.now() < newDate + 5000
            true
          callback null, 'done'

      result = do Meteor.wrapAsync(asyncFn)

      console.log 'done 3'
      return 'done2'