76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
import asyncio
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import json
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import logging
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import redis.asyncio as aredis
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from settings import REDIS_URL
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logger = logging.getLogger('\t[services.redis]\t')
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logger.setLevel(logging.DEBUG)
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class RedisCache:
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def __init__(self, uri=REDIS_URL):
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self._uri: str = uri
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self.pubsub_channels = []
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self._client = None
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async def connect(self):
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self._client = aredis.Redis.from_url(self._uri, decode_responses=True)
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async def disconnect(self):
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if self._client:
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await self._client.close()
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async def execute(self, command, *args, **kwargs):
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if self._client:
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try:
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logger.debug(command + ' ' + ' '.join(args))
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r = await self._client.execute_command(command, *args, **kwargs)
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return r
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except Exception as e:
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logger.error(f'{e}')
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return None
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async def subscribe(self, *channels):
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if self._client:
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async with self._client.pubsub() as pubsub:
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for channel in channels:
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await pubsub.subscribe(channel)
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self.pubsub_channels.append(channel)
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async def unsubscribe(self, *channels):
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if not self._client:
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return
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async with self._client.pubsub() as pubsub:
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for channel in channels:
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await pubsub.unsubscribe(channel)
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self.pubsub_channels.remove(channel)
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async def publish(self, channel, data):
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if not self._client:
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return
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await self._client.publish(channel, data)
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async def listen(self, pattern):
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if self._client:
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pubsub = self._client.pubsub()
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await pubsub.psubscribe(pattern)
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while True:
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message = await pubsub.get_message()
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if message and isinstance(message['data'], (str, bytes, bytearray)):
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logger.debug('pubsub got msg')
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try:
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yield json.loads(message['data']), message.get('channel')
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except Exception as e:
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logger.error(f'{e}')
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await asyncio.sleep(1)
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redis = RedisCache()
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__all__ = ['redis']
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