3.rabbitmq 发布/订阅

1. 发布者

#coding:utf8

import pika
import json
import sys

message = ''.join(sys.argv[1:]) or "hello word"

connection = pika.BlockingConnection(pika.ConnectionParameters(
               'localhost'))
channel = connection.channel()

channel.exchange_declare(exchange='logs', exchange_type='fanout')
# 创建交换机

channel.basic_publish(exchange='logs',
    routing_key='',
    body=message)
print " [x] Sent 'Hello World!'"

connection.close()

2. 订阅者

# coding:utf8

import pika
import MySQLdb
import time
connection = pika.BlockingConnection(pika.ConnectionParameters(
    'localhost'))
channel = connection.channel()

channel.exchange_declare(exchange='logs',exchange_type='fanout')

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

channel.queue_bind(exchange='logs',queue=queue_name)

def callback(ch, method, properties, body):
    print("[x] received %r" % body)
    time.sleep(5)
    print("done")
    # ch.basic_ack(delivery_tag=method.delivery_tag) # ack 消息成功确认

channel.basic_qos(prefetch_count=1)#公平分派
channel.basic_consume(callback,
                      queue=queue_name,
                      no_ack=True)
print("waiting for messages")
channel.start_consuming()