from django.conf import settings

from django.contrib.sessions.backends.base import SessionBase

from django.core.cache import cache

class SessionStore(SessionBase):

    """

    A cache-based session store. 

    """

    def __init__(self, session_key=None):

        self._cache = cache

        super(SessionStore, self).__init__(session_key)

    def load(self):

        session_data = self._cache.get(self.session_key)

        return session_data or {}

    def save(self):

        self._cache.set(self.session_key, self._session, settings.SESSION_COOKIE_AGE)

    def exists(self, session_key):

        if self._cache.get(session_key):

            return True

        return False

    def delete(self, session_key):

        self._cache.delete(session_key)