61 lines
1.4 KiB
Python
61 lines
1.4 KiB
Python
import logging
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import threading
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from typing import Optional
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from platypush.bus import Bus
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from platypush.message import Message
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logger = logging.getLogger('platypush:bus:redis')
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class RedisBus(Bus):
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"""
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Overrides the in-process in-memory local bus with a Redis bus
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"""
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_DEFAULT_REDIS_QUEUE = 'platypush/bus'
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def __init__(self, *args, on_message=None, redis_queue=None, **kwargs):
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from platypush.utils import get_redis
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super().__init__(on_message=on_message)
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self.redis = get_redis(*args, **kwargs)
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self.redis_args = kwargs
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self.redis_queue = redis_queue or self._DEFAULT_REDIS_QUEUE
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self.on_message = on_message
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self.thread_id = threading.get_ident()
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def get(self) -> Optional[Message]:
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"""
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Reads one message from the Redis queue
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"""
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try:
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if self.should_stop():
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return None
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msg = self.redis.blpop(self.redis_queue, timeout=1)
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if not msg or msg[1] is None:
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return None
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msg = msg[1].decode('utf-8')
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return Message.build(msg)
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except Exception as e:
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logger.exception(e)
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return None
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def post(self, msg):
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"""
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Sends a message to the Redis queue
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"""
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return self.redis.rpush(self.redis_queue, str(msg))
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def stop(self):
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super().stop()
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self.redis.close()
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# vim:sw=4:ts=4:et:
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