# -*- coding:utf-8 -*-
import pika,uuid,time
cmd = 'dir'
class FibonacciRpcClient(object):
    def __init__(self):
        self.connection = pika.BlockingConnection(pika.ConnectionParameters('192.168.199.11',5672,'/',pika.PlainCredentials('guest', 'guest')))
        self.channel = self.connection.channel()
        result = self.channel.queue_declare(queue='',exclusive=True)
        self.callback_queue = result.method.queue #生成一个随机Q
        self.channel.basic_consume(queue=self.callback_queue,
                                   on_message_callback=self.on_response, #回调函数
                                   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())
        #发送消息
        self.channel.basic_publish(exchange='',
                                   routing_key='rpc_queue',
                                   body=str(n),
                                   properties=pika.BasicProperties(
                                       reply_to=self.callback_queue, #随机Q
                                       correlation_id=self.corr_id,)
                                   )
        while self.response is None:
            #self.channel.start_consuming()
            self.connection.process_data_events() #  执行call方法后，先发送消息，然后开始接收消息 *******  非阻塞的  chan.start_consuming()#开始循环取消息 【发送完消息后，开始接受消息】
            # print("没有消息")
            time.sleep(1)
        return self.response
fibonacci_rpc = FibonacciRpcClient()
print(" [生产者开始发送指令: %s]"%cmd)
response = fibonacci_rpc.call(cmd)
print(" [生产者得到指令的执行结果:]%s" %response)