def _load(self):
"""Load data from the database."""
namespace = SessionNamespaceObject()
namespace['id'] = self.m_session
namespace['scope'] = self.m_scope
namespace['data'] = dumps({})
# Futher locking is not necessary as the session record has already
# been locked.
namespace = self.m_transaction.merge(namespace, lock=False)
self.m_namespace = namespace
data = loads(namespace['data'])
self.update(data)
def flush(self):
"""Sync data back to the database."""
if not self.m_dirty:
return
self.m_namespace['data'] = dumps(self.copy())