如何在RabbitMQ/pika中实现优先级队列

# 安装RabbitMQ
sudo apt-get update
sudo apt-get install rabbitmq-server

# 安装pika库
pip install pika

import pika

# 建立连接
connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

# 声明优先级队列
queue_arguments = {"x-max-priority": 10}
channel.queue_declare(queue='priority_queue', arguments=queue_arguments)

# 关闭连接
connection.close()

import pika

# 建立连接
connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

# 发送消息到优先级队列
properties = pika.BasicProperties(priority=5)
channel.basic_publish(exchange='',
                      routing_key='priority_queue',
                      body='Hello, priority queue!',
                      properties=properties)

# 关闭连接
connection.close()

import pika

# 定义消息处理函数
def callback(ch, method, properties, body):
    print("Received %r" % body)
    ch.basic_ack(delivery_tag=method.delivery_tag)

# 建立连接
connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

# 声明优先级队列
queue_arguments = {"x-max-priority": 10}
channel.queue_declare(queue='priority_queue', arguments=queue_arguments)

# 接收并处理消息
channel.basic_consume(queue='priority_queue', on_message_callback=callback)

print('Waiting for messages...')
channel.start_consuming()