59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
import ast
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import json
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import logging
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import threading
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from redis import Redis
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from platypush.bus import Bus
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from platypush.config import Config
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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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""" Overrides the in-process in-memory local bus with a Redis bus """
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_DEFAULT_REDIS_QUEUE = 'platypush/bus'
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def __init__(self, on_message=None, redis_queue=_DEFAULT_REDIS_QUEUE,
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*args, **kwargs):
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super().__init__(on_message=on_message)
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if not args and not kwargs:
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kwargs = (Config.get('backend.redis') or {}).get('redis_args', {})
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self.redis = Redis(*args, **kwargs)
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self.redis_args = kwargs
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self.redis_queue = 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):
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""" Reads one message from the Redis queue """
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msg = None
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try:
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msg = self.redis.blpop(self.redis_queue)
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if not msg or msg[1] is None:
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return
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msg = msg[1].decode('utf-8')
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try:
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msg = json.loads(msg)
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except json.decoder.JSONDecodeError:
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msg = ast.literal_eval(msg)
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msg = Message.build(msg)
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except Exception as e:
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logger.exception(e)
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return msg
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def post(self, msg):
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""" Sends a message to the Redis queue """
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return self.redis.rpush(self.redis_queue, str(msg))
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# vim:sw=4:ts=4:et:
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