1 """

     2 Cached, database-backed sessions.

     3 """

     4 

     5 from django.conf import settings

     6 from django.contrib.sessions.backends.db import SessionStore as DBStore

     7 from django.core.cache import cache

     8 

     9 class SessionStore(DBStore):

    10     """

    11     Implements cached, database backed sessions.

    12     """

    13 

    14     def __init__(self, session_key=None):

    15         super(SessionStore, self).__init__(session_key)

    16 

    17     def load(self):

    18         data = cache.get(self.session_key, None)

    19         if data is None:

    20             data = super(SessionStore, self).load()

    21             cache.set(self.session_key, data, settings.SESSION_COOKIE_AGE)

    22         return data

    23 

    24     def exists(self, session_key):

    25         return super(SessionStore, self).exists(session_key)

    26 

    27     def save(self, must_create=False):

    28         super(SessionStore, self).save(must_create)

    29         cache.set(self.session_key, self._session, settings.SESSION_COOKIE_AGE)

    30 

    31     def delete(self, session_key=None):

    32         super(SessionStore, self).delete(session_key)

    33         cache.delete(session_key or self.session_key)

    34 

    35     def flush(self):

    36         """

    37         Removes the current session data from the database and regenerates the

    38         key.

    39         """

    40         self.clear()

    41         self.delete(self.session_key)

    42         self.create()