RabbitMQ之Topics（更加细粒度的接收消息）

组播

　　功能更加的强大，通过'#'(哈希)绑定键绑定时候，可以接收所有的消息，此时与路由无关，此时就像fanout交换器中一样

　　当在绑定中不使用特殊字符'*','#'接收消息的时候，此时就跟direct一样

 topic_send.py

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

import pika
import sys

credentials = pika.PlainCredentials('admin', 'admin123456')
connection = pika.BlockingConnection(pika.ConnectionParameters(host='192.168.1.6', credentials=credentials))
channel = connection.channel()

channel.exchange_declare(exchange='topic_logs', exchange_type='topic')

routing_key = sys.argv[1] if len(sys.argv) > 2 else 'anonymous.info'
message = ' '.join(sys.argv[2:]) or 'Hello World!'
channel.basic_publish(
    exchange='topic_logs', routing_key=routing_key, body=message)
print(" [x] Sent %r:%r" % (routing_key, message))
connection.close()

topic_recevie.py

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

import pika
import sys

credentials = pika.PlainCredentials('admin', 'admin123456')
connection = pika.BlockingConnection(pika.ConnectionParameters(host='192.168.1.6', credentials=credentials))
channel = connection.channel()

channel.exchange_declare(exchange='topic_logs', exchange_type='topic')

result = channel.queue_declare('', exclusive=True)
queue_name = result.method.queue

binding_keys = sys.argv[1:]
if not binding_keys:
    sys.stderr.write("Usage: %s [binding_key]...
" % sys.argv[0])
    sys.exit(1)

for binding_key in binding_keys:
    channel.queue_bind(
        exchange='topic_logs', queue=queue_name, routing_key=binding_key)

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


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


channel.basic_consume(
    queue=queue_name, on_message_callback=callback, auto_ack=True)

channel.start_consuming()

 最终效果就可以达到选择性接收并且还能够更加细粒度的可以接收消息