我是rabbitmq和pika的新手,并且在停止消费方面遇到了麻烦。
频道和队列设置:
connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()
channel.queue_declare(queue=new_task_id, durable=True, auto_delete=True)
基本上,消费者和生产者都是这样的:
消费者:
def task(task_id):
def callback(channel, method, properties, body):
if body != "quit":
print(body)
else:
print(body)
channel.stop_consuming(task_id)
channel.basic_consume(callback, queue=task_id, no_ack=True)
channel.start_consuming()
print("finish")
return "finish"
生产者:
proc = Popen(['app/sample.sh'], shell=True, stdout=PIPE)
while proc.returncode is None: # running
line = proc.stdout.readline()
if line:
channel.basic_publish(
exchange='',
routing_key=self.request.id,
body=line
)
else:
channel.basic_publish(
exchange='',
routing_key=self.request.id,
body="quit"
)
break
消费者task
给了我输出:
# ... output from sample.sh, as expected
quit
�}q(UstatusqUSUCCESSqU tracebackqNUresultqNUtask_idqU
1419350416qUchildrenq]u.
但是"finish"
没有打印出来,所以我猜测它是因为channel.stop_consuming(task_id)
没有停止消费。如果是这样,那么正确的方法是什么?谢谢。
答案 0 :(得分:7)
我遇到了同样的问题。这似乎是由内部start_consuming
调用self.connection.process_data_events(time_limit=None)
引起的。这个time_limit=None
会让它挂起。
我设法通过将channel.start_consuming()
的调用替换为其实现来解决此问题,黑客攻击:
while channel._consumer_infos:
channel.connection.process_data_events(time_limit=1) # 1 second