lib/actors/examples/simple/simple.nit

   1 # This file is part of NIT (http://www.nitlanguage.org).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # A very simple example of the actor model
  16 module simple
  17
  18 import actors
  19
  20
  21 # A class anotated with `actor`
  22 # It automatically gets the `async` property to make asynchronous calls on it
  23 class A
  24         actor
  25
  26         # Prints "foo"
  27         fun foo do print "foo"
  28
  29         # Returns i^2
  30         fun bar(i : Int): Int do return i * i
  31 end
  32
  33 # Create a new instance of A
  34 var a = new A
  35
  36 # Make an asynchronous call
  37 a.async.foo
  38
  39 # Make a synchronous call
  40 a.foo
  41
  42 # Make an asynchronous call
  43 # Which return a `Future[Int]` instead of `Int`
  44 var r = a.async.bar(5)
  45
  46 # Retrieve the value of the future
  47 print r.join
  48
  49 # Make a Synchronous call
  50 print a.bar(5)