rpc_client.py经典python实例

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   self.channel.basic_consume(self.on_response,no_ack=True, queue=self.callback_queue)   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()) 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(30)" response = fibonacci_rpc.call(30) print " [.] Got %r" % (response,)