app/django/core/cache/backends/memcached.py
author Lennard de Rijk <ljvderijk@gmail.com>
Sat, 21 Feb 2009 10:53:52 +0000
changeset 1421 7602d41f0ed8
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Made some changes to StudentProposal. Abstract is now required and content field has been added. New is now the default status. This will be used to easily distinguish between applications that didn't have their initial ranking/scoring yet. Patch by: Lennard de Rijk Reviewed by: to-be-reviewed

"Memcached cache backend"

from django.core.cache.backends.base import BaseCache, InvalidCacheBackendError
from django.utils.encoding import smart_unicode, smart_str

try:
    import cmemcache as memcache
except ImportError:
    try:
        import memcache
    except:
        raise InvalidCacheBackendError("Memcached cache backend requires either the 'memcache' or 'cmemcache' library")

class CacheClass(BaseCache):
    def __init__(self, server, params):
        BaseCache.__init__(self, params)
        self._cache = memcache.Client(server.split(';'))

    def add(self, key, value, timeout=0):
        if isinstance(value, unicode):
            value = value.encode('utf-8')
        return self._cache.add(smart_str(key), value, timeout or self.default_timeout)

    def get(self, key, default=None):
        val = self._cache.get(smart_str(key))
        if val is None:
            return default
        else:
            if isinstance(val, basestring):
                return smart_unicode(val)
            else:
                return val

    def set(self, key, value, timeout=0):
        if isinstance(value, unicode):
            value = value.encode('utf-8')
        self._cache.set(smart_str(key), value, timeout or self.default_timeout)

    def delete(self, key):
        self._cache.delete(smart_str(key))

    def get_many(self, keys):
        return self._cache.get_multi(map(smart_str,keys))

    def close(self, **kwargs):
        self._cache.disconnect_all()