lib/actors/examples/agent_simulation/agent_simulation.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 "Framework" to make Multi-Agent Simulations in Nit
  16 module agent_simulation is no_warning("missing-doc")
  17
  18 import actors
  19
  20 # Master of the simulation, it initiates the steps and waits for them to terminate
  21 class ClockAgent
  22         actor
  23
  24         # Number of steps to do in the simulation
  25         var nb_steps: Int
  26
  27         # List of Agents in the simulation
  28         var agents: Array[Agent]
  29
  30         # Number of agents that finished their step
  31         var nb_finished = 0
  32
  33         fun do_step do
  34                 for a in agents do a.async.do_step
  35                 nb_steps -= 1
  36         end
  37
  38         fun finished_step do
  39                 nb_finished += 1
  40                 if nb_finished == agents.length then
  41                         nb_finished = 0
  42                         if nb_steps != 0 then async.do_step
  43                 end
  44         end
  45 end
  46
  47 class Agent
  48         actor
  49
  50         # Doing a step in the simulation
  51         fun do_step do
  52         end
  53
  54         fun end_step do clock_agent.async.finished_step
  55
  56 end
  57
  58 redef class Sys
  59         var clock_agent: ClockAgent is noautoinit,writable
  60 end