【吴师傅的Python面包店】Day 8

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leland

修改于 2021-10-08 12:19:07

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前言：十一国庆只能待在家的吴师傅十分无聊，决定开一家Python面包店打发下时间。后面的每一天，吴师傅都会用一段代码简单实现卖面包的功能，并且解决前一天暴露的问题。

为了排查顾客下了单但是没有拿到面包的问题，吴师傅要求每位面包师傅根据订单号生产面包，并且面包按订单号给到对应顾客。

"""每个面包师傅根据订单数生产面包，并且面包要按订单号给到顾客。"""

import time
import threading
import multiprocessing
import random

import zmq


PRODUCER_NUM = 3

def order(topic, order_id, pub_socket):
    """下单。"""
    
    print('Order:%s, topic:%s' % (order_id, topic))
    pub_socket.send_multipart([topic.encode(), order_id.encode()])


def worker(topic, context):

    sub_socket = context.socket(zmq.SUB)
    sub_socket.connect("tcp://localhost:5555")
    sub_socket.setsockopt(zmq.SUBSCRIBE, topic.encode('utf8'))
    sub_socket.setsockopt(zmq.RCVTIMEO, 2000)    # 设置接受超时
    print('Windows:', topic)
    while 1:
        msg = None
        try:
            msg, order_id = sub_socket.recv_multipart()
        except Exception as e:
            pass
        else:
            if msg:
                # 师傅收到订单，制作完成并返回了面包
                print('Finished: %s, %s' % (order_id.decode(), msg.decode()))
        time.sleep(1)


def run_bakery():
    context = zmq.Context()
    workers = []
    for i in range(PRODUCER_NUM):
        # 每个师傅对应一条买面包店队伍
        topic = 'P:%s' % i
        w = threading.Thread(target=worker, args=(topic, context))
        workers.append(w)
        w.start()
    for w in workers:
        w.join()

def run_customer():
    # 模拟顾客订单
    context = zmq.Context()
    pub_socket = context.socket(zmq.PUB)
    pub_socket.bind("tcp://*:5555")

    time.sleep(2)
    orders_num = random.randint(6, 10)
    for j in range(orders_num):
        i = random.randint(0, PRODUCER_NUM-1)
        topic = 'P:%s' % i
        order_id = "id_%s" % j
        time.sleep(0.1)
        order(topic, order_id, pub_socket)

def run():
    p1 = multiprocessing.Process(target=run_bakery)
    p2 = multiprocessing.Process(target=run_customer)
    p1.start()
    p2.start()
    p1.join()
    p2.join()

if __name__ == "__main__":
    run()