RabbitMq之路由键模糊匹配

前言#

路由键模糊匹配#

就是可以使用正则表达式，和常用的正则表示式不同，这里的话“#”表示所有、全部的意思；“*”只匹配到一个词。看完示例就能明白了。

实例的功能大概是这样：#

比如你有个知心好朋友，不管开心、伤心、工作上的还是生活上的事情都可以和她说；还有一些朋友可以分享开心的事情；还有一些朋友，你可以把不开心的事情和她说。

路由键#

routings = [ 'happy.work', 'happy.life' , 'happy.work.teacher', 'sad.work', 'sad.life', 'sad.work.teacher' ]

"#"：匹配所有的路由键

"happy.#"：匹配 'happy.work', 'happy.life' , 'happy.work.teacher'

"work.#"：无匹配

“happy.*”：匹配 'happy.work', 'happy.life'

"*.work"：匹配 'happy.work', 'sad.work'

"*.work.#"：匹配 'happy.work', 'happy.work.teacher', 'sad.work', 'sad.work.teacher'

代码#

发送端

import pika

hostname = '127.0.0.1'
parameters = pika.ConnectionParameters(hostname)
connection = pika.BlockingConnection(parameters)

# 创建通道
channel = connection.channel()
# 定义交换机，设置类型为topic
channel.exchange_declare(exchange='test_queue_topic', exchange_type='topic')

# 定义三个路由键
routings = ['happy.work', 'happy.life', 'sad.work', 'sad.life']

# 将消息依次发送到交换机，并设置路由键
for routing in routings:
    message = '%s message.' % routing
    channel.basic_publish(exchange='test_queue_topic', routing_key=routing, body=message)
    print(message)

connection.close()

接受端

import sys, pika

hostname = '127.0.0.1'
parameters = pika.ConnectionParameters(hostname)
connection = pika.BlockingConnection(parameters)

# 创建通道
channel = connection.channel()
# 定义交换机，设置类型为topic
channel.exchange_declare(exchange='test_queue_topic', exchange_type='topic')

# 从命令行获取路由键参数，如果没有，则设置为info
routings = sys.argv[1:]
if not routings:
    routings = ['info']

# 生成临时队列，
result = channel.queue_declare(queue='test_queue_topic', exclusive=True)  # exclusive=True 当接收端退出的时候 会销毁那个临时创建的队列
queue_name = result.method.queue

for routing in routings:
    # 绑定到交换机上，设置路由键
    channel.queue_bind(exchange='test_queue_topic', queue=queue_name, routing_key=routing)


def callback(ch, method, properties, body):
    print(" [x] Received %r" % (body,))


channel.basic_consume(
    queue='test_queue_topic',  # 指定队列名
    on_message_callback=callback,  # 从队列里获取消息
    auto_ack=False  # mq服务器挂掉 防止任务丢失
)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()