def prepare_food(self, cus, env, data, parameters):
print("Kitchen is preparing food for %s at %.2f" % (cus, env.now))
food_prepare_time = max(
parameters['food_prepare_min'],
random.exponential(scale=parameters['food_prepare_mu']))
data[cus, 6] = round_down(food_prepare_time)
yield self.env.timeout(food_prepare_time)
print("Cooked food for %s at %.2f" % (cus, env.now))
def customer(env, label, queue, kitchen, parameters, data):
# the customer process arrive at the restaurant and request counter to take order
label = label - 1
arrive_time = env.now
print("%s entering the queue at %.2f" % (label, arrive_time))
# data[label,0]=label
data[label, 0] = round_down(arrive_time)
data[label, 1] = len(queue.counter.queue)
with queue.counter.request() as my_turn:
yield my_turn
service_start = env.now
data[label, 3] = round_down(service_start)
queue_time = service_start - arrive_time
data[label, 2] = round_down(queue_time)
# placing order at counter
yield env.process(
queue.take_order(label, env, service_start, parameters, data))
# waiting order at counter
prepare_food_start = env.now
data[label, 4] = round_down(prepare_food_start)
yield env.timeout(0)
yield env.process(
queue.receive_order(label, env, kitchen, parameters, data))
# prepare_food_end = round_down(env.now)
# counter_total_wait_times += round_down(prepare_food_end - prepare_food_start)
# receive food from counter
exit_time = env.now
data[label, 5] = round_down(exit_time)
# total wait time
data[label, 7] = round_down(data[label, 6] + data[label, 2])
# total time in system
data[label, 9] = round_down(exit_time - arrive_time)
def take_order(self, cus, env, service_start, parameters, data):
global counter_total_service_times
print("%s is placing order at counter %.2f" % (cus, service_start))
time_taken_to_place_order = max(
random.exponential(scale=parameters['order_time_mu']),
parameters['order_time_min'])
yield self.env.timeout(time_taken_to_place_order)
service_end = env.now
print("Order of %s sent to kitchen at %.2f" % (cus, service_end))
data[cus, 8] = round_down(service_end - service_start)
if (cus < 1000):
counter_total_service_times += service_end - service_start