app/django/core/cache/backends/memcached.py
author Sverre Rabbelier <srabbelier@gmail.com>
Sat, 12 Sep 2009 00:36:49 +0200
changeset 2898 ac5f77cd6046
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Fix 500 when saving /site/edit without email When saving /site/edit with no no_reply_email set, a 500 error page would be returned due to an empty value being passed as value to the datastore (which is not allowed for email fields).

"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()