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55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
from django.core.exceptions import ImproperlyConfigured
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import six
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from . import Backend
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from .. import settings, utils, signals, config
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try:
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from cPickle import loads, dumps
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except ImportError:
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from pickle import loads, dumps
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class RedisBackend(Backend):
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def __init__(self):
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super(RedisBackend, self).__init__()
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self._prefix = settings.REDIS_PREFIX
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connection_cls = settings.REDIS_CONNECTION_CLASS
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if connection_cls is not None:
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self._rd = utils.import_module_attr(connection_cls)()
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else:
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try:
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import redis
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except ImportError:
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raise ImproperlyConfigured(
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"The Redis backend requires redis-py to be installed.")
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if isinstance(settings.REDIS_CONNECTION, six.string_types):
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self._rd = redis.from_url(settings.REDIS_CONNECTION)
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else:
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self._rd = redis.Redis(**settings.REDIS_CONNECTION)
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def add_prefix(self, key):
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return "%s%s" % (self._prefix, key)
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def get(self, key):
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value = self._rd.get(self.add_prefix(key))
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if value:
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return loads(value)
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return None
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def mget(self, keys):
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if not keys:
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return
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prefixed_keys = [self.add_prefix(key) for key in keys]
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for key, value in six.moves.zip(keys, self._rd.mget(prefixed_keys)):
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if value:
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yield key, loads(value)
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def set(self, key, value):
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old_value = self.get(key)
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self._rd.set(self.add_prefix(key), dumps(value))
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signals.config_updated.send(
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sender=config, key=key, old_value=old_value, new_value=value
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)
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