mirror of
https://github.com/carrotquest/django-clickhouse.git
synced 2025-02-12 00:40:34 +03:00
62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
"""
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Contains additional components for redis-py to use in RedisStorage
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"""
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import os
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from itertools import chain
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import logging
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from .exceptions import RedisLockTimeoutError
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logger = logging.getLogger('django-clickhouse')
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class RedisLock:
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"""
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Fixes issue of https://github.com/andymccurdy/redis-py/issues/621
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"""
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def __init__(self, redis_client, *args, **kwargs):
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self.lock = redis_client.lock(*args, **kwargs)
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def __enter__(self):
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return self.lock.acquire()
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def __exit__(self, type, value, tb):
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self.lock.release()
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def acquire(self):
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logger.debug('django-clickhouse: acquiring lock "%s" with pid %d' % (self.lock.name, os.getpid()))
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if self.lock.acquire():
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logger.debug('django-clickhouse: acquired lock "%s" with pid %d' % (self.lock.name, os.getpid()))
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return self
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else:
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logger.warning('django-clickhouse: timeout lock "%s" with pid %d' % (self.lock.name, os.getpid()))
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raise RedisLockTimeoutError()
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def release(self):
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logger.debug('django-clickhouse: releasing lock "%s" with pid %d' % (self.lock.name, os.getpid()))
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self.lock.release()
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def hard_release(self) -> bool:
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"""
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Drops the lock, not looking if it is acquired by anyone.
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:return: Boolean - if lock has been acquired before releasing or not
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"""
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logger.warning('django-clickhouse: hard releasing lock "%s" with pid %d' % (self.lock.name, os.getpid()))
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return bool(self.lock.redis.delete(self.lock.name))
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def redis_zadd(redis_client, key, mapping, **kwargs):
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"""
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In redis-py 3.* interface of zadd changed to mapping
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:return:
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"""
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import redis
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if int(redis.__version__.split('.', 1)[0]) < 3:
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# key, score1, value1, score2, value2, ...
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items = chain(*((score, key) for key, score in mapping.items()))
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else:
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items = [mapping]
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return redis_client.zadd(key, *items, **kwargs) |