rabbitmq介绍及基本使用

import pika


credentials = pika.PlainCredentials(‘alex‘, ‘alex123‘)
connection = pika.BlockingConnection(pika.ConnectionParameters(
    ‘192.168.14.52‘,credentials=credentials))

channel = connection.channel() #建立了rabbit 协议的通道

# 声明queue
channel.queue_declare(queue=‘hello‘)

# n RabbitMQ a message can never be sent directly to the queue, it always needs to go through an exchange.
channel.basic_publish(exchange=‘‘,
                      routing_key=‘hello‘,
                      body=‘Hello World!‘)
print(" [x] Sent ‘Hello World!‘")
connection.close()

import pika
import time

credentials = pika.PlainCredentials(‘alex‘, ‘alex123‘)
connection = pika.BlockingConnection(pika.ConnectionParameters(
    ‘192.168.14.52‘,credentials=credentials))

channel = connection.channel()

# You may ask why we declare the queue again ? we have already declared it in our previous code.
# We could avoid that if we were sure that the queue already exists. For example if send.py program
# was run before. But we‘re not yet sure which program to run first. In such cases it‘s a good
# practice to repeat declaring the queue in both programs.
channel.queue_declare(queue=‘hello‘)


def callback(ch, method, properties, body):

    print("received msg...start processing....",body)
    time.sleep(20)
    print(" [x] msg process done....",body)


channel.basic_consume(callback,
                      queue=‘hello‘,
                      no_ack=True)

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