RabbitMQ 消息队列
RabbitMQ简介
AMQP是高级消息队列协议,是应用层协议的一个开放标准,为面向消息的中间件设计。消息中间件主要用于组件之间的解耦,消息的发送者无需知道消息使用者的存在,反之亦然。AMQP的主要特征是面向消息、队列、路由(包括点对点和发布/订阅)、可靠性、安全。
RabbitMQ是一个开源的AMQP实现,服务器端用Erlang语言编写,支持多种客户端。用于在分布式系统中存储转发消息,在易用性、扩展性、高可用性等方面表现不俗。
安装RabbitMQ和python的pika模块
安装RabbitMQ
https://www.rabbitmq.com/install-windows.html 在Direct Downloads中点击rabbitmq-server-3.8.1.exe
安装完之后会提示安装erlang平台,点击是,会自动安装erlang
producer
import pika connection = pika.BlockingConnection(pika.ConnectionParameters('localhost')) channel = connection.channel() channel.queue_declare(queue='hello') channel.basic_publish(exchange='', routing_key='hello', body='Hello World!') print(" [x] Sent 'Hello World!'") connection.close()
consumer
import pika connection = pika.BlockingConnection(pika.ConnectionParameters('localhost')) channel = connection.channel() channel.queue_declare(queue='hello') def callback(ch, method, properties, body): print(" [x] Received %r" % body) channel.basic_consume(queue='hello', auto_ack=True, on_message_callback=callback) print(' [*] Waiting for messages. To exit press CTRL+C') channel.start_consuming()
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