Putting it all together
send.py
#!/usr/bin/env python
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='logs', exchange_type='fanout') # 冪等
message = ' '.join(sys.argv[1:]) or "info: Hello World!"
channel.basic_publish(exchange='logs', routing_key='', body=message)
print(" [x] Sent %r" % message)
connection.close()
receive.py
#!/usr/bin/env python
import pika
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='logs', exchange_type='fanout')
result = channel.queue_declare(queue='', exclusive=True) # 臨時隊列
queue_name = result.method.queue
channel.queue_bind(exchange='logs', queue=queue_name)
print(' [*] Waiting for logs. To exit press CTRL+C')
def callback(ch, method, properties, body):
print(" [x] %r" % body)
channel.basic_consume(
queue=queue_name, on_message_callback=callback, auto_ack=True)
channel.start_consuming()
隊列綁定圖：
可能有的同學會問：爲什麼沒有指定routing_key呢？ -- 由於fanout這種模式的特點，它類似於發報紙的模式，所以寫不寫都不影響發送消息。
臨時隊列
使用場景：1. 在連接到RabbitMQ時需要一個全新的空的隊列 2. 在consumer連接關閉時隊列也被刪除時
1. result = channel.queue_declare(queue='') 2. result = channel.queue_declare(queue='', exclusive=True)