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#!/usr/bin/pythonfrom __future__ import generatorsfrom SimPy.Simulation import *from random import expovariate, normalvariatefrom copy import copy# ConstantsNUM_GATE = 5   # number of gateNUM_RUNWAY = 2  # number of runwayT_RUNWAY = 10  # runway occupationT_GATES = 45   # gate occupationT_LATE_WAIT_MAX = 15T_PLANE_CLEANUP = 15PG_INT = 25.0  # average new plane comespcnt = 10#class PlaneGenerator(Process):    def __init__(self, name, airports):        Process.__init__(self,name)        self.cnt = 0        self.airports = airports        self.planes = []        self.random = random.Random()    def generate(self):        while True:            length = len(self.airports)            aid = self.random.randint(0, length-1)            airport = self.airports[aid]            p = Plane('Plane #' + str(self.cnt), airport)            self.planes.append(p)            activate(p, p.execute())            yield hold,self,r.expovariate(1/PG_INT)            self.cnt += 1class Plane(Process):    def __init__(self, name, airport):        Process.__init__(self,name)        self.airport = airport        self.trace = []        self.random = random.Random()    def execute(self):        while True:            self.trace.append(self.airport)            self.airport.add_plane(self)                # runway (landing)            s = now()            yield request, self, self.airport.runway            f = now()            yield hold, self, T_RUNWAY            yield release, self, self.airport.runway            self.airport.mon_landing.observe(f-s)            bs = now()            self.airport.mon_airport.add()                # gate (passanger out)            s = now()            yield request, self, self.airport.gate            f = now()            self.airport.mon_airport.sub()            yield hold, self, T_GATES            yield release, self, self.airport.gate            self.airport.mon_gate_in.observe(f-s)            self.airport.mon_airport.add()                # clean up (change staff, clean the cabin, etc)            yield hold, self, T_PLANE_CLEANUP            yield hold, self, self.get_wait_schedule()                # gate (passanger in)            s = now()            yield request, self, self.airport.gate            f = now()            self.airport.mon_airport.sub()            yield hold, self, T_GATES            yield hold, self, self.get_wait_late()            yield release, self, self.airport.gate            self.airport.mon_gate_out.observe(f-s)            self.airport.mon_airport.add()                bf = now();                # take off            s = now()            yield request, self, self.airport.runway            f = now()            self.airport.mon_airport.sub()            yield hold, self, T_RUNWAY            yield release, self, self.airport.runway            self.airport.mon_takeoff.observe(f-s)                self.airport.mon_board.observe(bf-bs)            # next destination            next = copy(self.airport.next)            next.append(-1)            length = len(next)            id = self.random.randint(0, length-1)            if next[id] == -1:                break            else:                self.airport = next[id]                    def get_wait_late(self):        # TODO        return 0    def get_wait_schedule(self):        # TODO        return 0class AirportMonitor:    def __init__(self):        self.cnt = 0        self.max = 0    def add(self):        self.cnt += 1        if (self.cnt > self.max):            self.max = self.cnt    def sub(self):        self.cnt -= 1class Airport:    def __init__(self, name, runway=NUM_RUNWAY, gate=NUM_GATE):        self.name = name        self.num_runway = runway        self.num_gate = gate        self.runway = Resource(self.num_runway)        self.gate = Resource(self.num_gate, monitored=True)        self.mon_airport = AirportMonitor()        self.mon_landing = Monitor("landing-" + name)        self.mon_takeoff = Monitor("takeoff-" + name)        self.mon_gate_in = Monitor("gatein-" + name)        self.mon_gate_out = Monitor("gateout-" + name)        self.mon_board = Monitor("board-" + name);        self.next = []        self.planes = []    def add_next_airport(self, aiport):        self.next.append(airport)        def add_plane(self, plane):        self.planes.append(plane)initialize()r = random.Random()airport_cengkareng = Airport("Cengkareng")airports = [ airport_cengkareng ]pg = PlaneGenerator('Source', airports)activate(pg, pg.generate(), 0.0)simulate(until=24*60)print "total planes generated: " + str(pg.cnt)for airport in airports:    print "# " + airport.name    print "  - average waiting time for runway (landing): " + str(airport.mon_landing.mean())    print "  - average waiting time for runway (takeoff): " + str(airport.mon_takeoff.mean())    print "  - average waiting time for gate (in): " + str(airport.mon_gate_in.mean())    print "  - average waiting time for gate (out): " + str(airport.mon_gate_out.mean())    print "  - average boarding time: " + str(airport.mon_board.mean())    print "  - max planes waiting for gate/runway: " + str(airport.mon_airport.max)# vim: ts=4 sts=4 expandtab