database - nodejs + connect + custom session store -

is there way override connect session store custom functionality?

i'm coming python flask framework have built hybrid memcache + database session handler. use memcache main session holder, on updates save data database , update database every 5 mins of session being alive.

doing way can lower amount of requests database, have system fall-back database in there memory or memcache issue.

is there way override or extend get/save/destroy functions?