Remote procedure call (RPC) redis使用

import pika
import uuid


class FibonacciRpcClient(object):
    def __init__(self):
        self.connection = pika.BlockingConnection(pika.ConnectionParameters(
            host=‘localhost‘))

        self.channel = self.connection.channel()

        result = self.channel.queue_declare(‘‘,exclusive=True)
        self.callback_queue = result.method.queue#生成随机对列

        self.channel.basic_consume(queue=self.callback_queue,
                                   on_message_callback=self.on_response,
                                   auto_ack=True
                                   )

    def on_response(self, ch, method, props, body):
        if self.corr_id == props.correlation_id:
            self.response = body

    def call(self, n):
        self.response = None
        self.corr_id = str(uuid.uuid4())
        print(‘发送数据：‘,self.corr_id)
        self.channel.basic_publish(exchange=‘‘,
                                   routing_key=‘rpc_queue‘,
                                   properties=pika.BasicProperties(
                                       reply_to=self.callback_queue,
                                       correlation_id=self.corr_id,
                                   ),
                                   body=str(n))
        while self.response is None:
            self.connection.process_data_events()
        return int(self.response)


fibonacci_rpc = FibonacciRpcClient()

print(" [x] Requesting fib(10)")
response = fibonacci_rpc.call(10)
print(" [.] Got %r" % response)

import pika
import time

connection = pika.BlockingConnection(pika.ConnectionParameters(
    host=‘localhost‘))

channel = connection.channel()

channel.queue_declare(queue=‘rpc_queue‘)


def fib(n):
    if n == 0:
        return 0
    elif n == 1:
        return 1
    else:
        return fib(n - 1) + fib(n - 2)


def on_request(ch, method, props, body):
    n = int(body)
    print(‘method‘,method,‘props‘,props)
    print(" [.] fib(%s)" % n)
    response = fib(n)

    ch.basic_publish(exchange=‘‘,
                     routing_key=props.reply_to,
                     properties=pika.BasicProperties(correlation_id=                                                          props.correlation_id),
                     body=str(response))
    ch.basic_ack(delivery_tag=method.delivery_tag)


channel.basic_qos(prefetch_count=1)
channel.basic_consume( queue=‘rpc_queue‘,on_message_callback=on_request)

print(" [x] Awaiting RPC requests")
channel.start_consuming()