Redis 消息订阅

In [2]: p = cache.pubsub()

In [3]: p
Out[3]: <redis.client.PubSub at 0x10fecb748>

In [5]: def echo_message(message):
   ...:     print("===========")
   ...:     print(message, type(message))
   ...:     print("===========")
   ...:

In [6]: p.subscribe(ywhyme_test=echo_message)

In [7]: cache.publish("ywhyme_test","hello world")
Out[7]: 1

In [8]: cache.publish("ywhyme_test","hello world")
Out[8]: 1

# 订阅时发送的 message
In [9]: p.get_message()
Out[9]: {'type': 'subscribe', 'pattern': None, 'channel': b'ywhyme_test', 'data': 1}

In [10]: p.get_message()
===========
{'type': 'message', 'pattern': None, 'channel': b'ywhyme_test', 'data': b'hello world'} <class 'dict'>
===========

In [11]: p.get_message()
===========
{'type': 'message', 'pattern': None, 'channel': b'ywhyme_test', 'data': b'hello world'} <class 'dict'>
===========

In [12]: p.get_message()


In [17]: cache.publish("ywhyme_test","hello world")
    ...:
Out[17]: 1

In [18]: p.get_message()
===========
{'type': 'message', 'pattern': None, 'channel': b'ywhyme_test', 'data': b'hello world'} <class 'dict'>
===========

In [19]: p.get_message()

# 设置一个子线程用于处理 get message
In [21]:  p.run_in_thread(sleep_time=0.001)
Out[21]: <PubSubWorkerThread(Thread-4089, started 123145592598528)>

In [22]: p.get_message()

In [23]: cache.publish("ywhyme_test","hello world")
    ...:
Out[23]: ===========
1
{'type': 'message', 'pattern': None, 'channel': b'ywhyme_test', 'data': b'hello world'} <class 'dict'>

===========
In [24]: cache.publish("ywhyme_test","hello world")
    ...:
Out[24]: ===========
1
{'type': 'message', 'pattern': None, 'channel': b'ywhyme_test', 'data': b'hello world'} <class 'dict'>

===========

参考 : https://github.com/andymccurdy/redis-py