def subscribe(self):
if not self.verify_token:
self.verify_token = make_id()
if not self.id:
self.lease_expires = datetime.now() + timedelta(seconds=LEASE_SECONDS)
self.id = self.save().id
self._ping_hub('subscribe')
def create(cls, user, object_type, object_id):
# 5 bytes of random data for id = 2**(8*5) ~= 1 billion ids
# Shouldn't get (m)any collisions at that size but we try to
# handle it anyway.
link = cls(user=user, object_type=object_type, object_id=object_id)
session = cls.query.session
for i in xrange(3):
link.id = make_id(length=5)
session.add(link)
try:
session.commit()
except IntegrityError:
session.rollback()
if i < 2:
continue
else:
# Automatically increase id length?
raise Exception('Unable to select new link id')
else:
break
return link
