python中RabbitMQ的使用（路由键模糊匹配）

路由键模糊匹配

使用正则表达式进行匹配。其中“#”表示所有、全部的意思；“*”只匹配到一个词。

匹配规则：

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' 

示例代码：

send4.py:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import pika

hostname = '192.168.1.133'
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='change_top', type='topic')

# 定义路由键
routings = ['happy.work', 'happy.life', 'sad.work', 'sad.life']

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

connection.close()

receive4.py:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import pika
import sys

hostname = '192.168.1.133'
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='change_top', type='topic')

# 从命令行获取路由参数，如果没有，则报错退出
routings = sys.argv[1:]
if not routings:
    print >> sys.stderr, "Usage: %s [routing_key]..." % (sys.argv[0],)
    exit()

# 生成临时队列，并绑定到交换机上，设置路由键
result = channel.queue_declare(exclusive=True)
queue_name = result.method.queue
for routing in routings:
    channel.queue_bind(exchange='change_top', queue=queue_name, routing_key=routing)


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


channel.basic_consume(callback, queue=queue_name, no_ack=True)

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

打开四个终端，运行一下命令：

发送端：

接收端：