class RpcClient(object):
def __init__(self, routing_key, host="localhost"):
# routing_key - 'rpc_queue'
self.routing_key = routing_key
self.rabbit = Rabbit(host)
# 队列名，随机
self.callback_queue_name = self.rabbit.declare_queue(exclusive=True)
self.rabbit.register_consumer(queue_name=self.callback_queue_name, callback=self.on_response)
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.rabbit.close()
def on_response(self, ch, method, props, body):
"""
收到消息就调用
:param ch: 管道内存对象地址
:param method: 消息发给哪个queue
:param props:
:param body: 数据对象
:return:
"""
# 判断本机生成的ID与生产端发过来的ID是否相等
if self.corr_id == props.correlation_id:
# 将body值 赋值给self.response
self.response = body
def call(self, msg):
"""
发送dict
:param msg:
:type msg: dict
:return: dict
"""
# 随机的字符串
self.response = None
self.corr_id = str(uuid.uuid4())
# routing_key='rpc_queue' 发一个消息到rpc_queue内
self.rabbit.channel.basic_publish(exchange='',
routing_key=self.routing_key,
properties=pika.BasicProperties(
# 执行命令之后消费端将结果返回给self.callaback_queue这个队列中
reply_to=self.callback_queue_name,
# 生成UUID 发送给消费端
correlation_id=self.corr_id,
),
# 发的消息，必须传入字符串，不能传数字
body=json.dumps(msg))
# 监听数据
while self.response is None:
# 没有消息不阻塞
self.rabbit.conn.process_data_events()
return json.loads(str(self.response, encoding="utf-8"))
def receive_msg(self):
rabbit = Rabbit()
rabbit.declare_queue("algorithm", durable=True)
rabbit.register_consumer(queue_name="algorithm", callback=self.callback, no_ack=False)
rabbit.start_consuming()
def consume_from_rmq(self):
rabbit = Rabbit()
rabbit.declare_queue("algorithm", durable=True)
rabbit.register_consumer(queue_name="algorithm", callback=self.algorithmCallback, no_ack=False)
rabbit.start_consuming()
