def remove_from_sessions(self, channel_id):
# Get session
session = Session.get_by_key_name(channel_id)
extended_session = None
if(session):
session.ended = datetime.utcnow()
session.put()
logging.info("Session ended in datastore")
# Init listener
listener = session.listener
# Init extended session
extended_session = Session.get_extended_session(session, listener)
new_sessions = []
for s in self.sessions:
if s["key_name"] != channel_id:
new_sessions.append(s)
memcache.set(self._memcache_station_sessions_id, new_sessions)
logging.info("Session removed from memcache")
# Online status becomes false if listener = host + no other host listening
if(listener and listener.key().name() == Session.host.get_value_for_datastore(session).name()):
logging.info("Admin leaves")
still_some_admins = False
for s in new_sessions:
if(s["listener_key_name"] == str(listener.key().name())):
still_some_admins = True
break
if not still_some_admins:
self.station.online = False
self.station.put()
logging.info("Station updated in datastore")
memcache.set(self._memcache_station_id, self.station)
logging.info("Station updated in memcache")
else:
logging.info("Still some admins online")
return extended_session
def sessions(self):
if not hasattr(self, "_sessions"):
self._sessions = memcache.get(self._memcache_station_sessions_id)
if self._sessions is None:
logging.info("Sessions not in memcache")
q = Session.all()
q.filter("host", self.station.key())
q.filter("ended", None)
q.filter("created >", datetime.utcnow() - timedelta(0,7200))
sessions = q.fetch(100)
extended_sessions = Session.get_extended_sessions(sessions)
memcache.set(self._memcache_station_sessions_id, extended_sessions)
logging.info("Sessions put in memcache")
self._sessions = extended_sessions
else:
logging.info("Sessions already in memcache")
return self._sessions
def post(self):
shortname = self.request.get("shortname")
station_proxy = StationApi(shortname)
station = station_proxy.station
output = {}
if(station):
# Increment visits counter
station_proxy.increment_visits_counter()
# Channel ID and token generation
time_now = str(timegm(gmtime()))
random_integer = str(randrange(1000))
new_channel_id = shortname + "." + time_now + random_integer
new_channel_token = channel.create_channel(new_channel_id)
listener_key = None
if(self.user_proxy):
listener_key = self.user_proxy.user.profile.key()
# Put new session in datastore
new_session = Session(
key_name = new_channel_id,
channel_token = new_channel_token,
listener = listener_key,
host = station.key(),
)
new_session.put()
logging.info("New session saved in datastore")
output = {
"channel_id": new_channel_id,
"channel_token": new_channel_token,
}
self.response.out.write(json.dumps(output))
else:
self.error(404)
def add_to_sessions(self, channel_id):
# Get session
session = Session.get_by_key_name(channel_id)
extended_session = None
if(session):
# After a reconnection the session may have ended. Correct it.
if session.ended is not None:
session.ended = None
session.put()
logging.info("Session had ended (probable reconnection). Corrected session put.")
# Init listener
listener = session.listener
# Init extended session
extended_session = Session.get_extended_session(session, listener)
new_sessions = self.sessions
new_sessions.append(extended_session)
memcache.set(self._memcache_station_sessions_id, new_sessions)
logging.info("Session added in memcache")
# Online status becomes true if listener = host
if(listener and listener.key().name() == Session.host.get_value_for_datastore(session).name()):
logging.info("Admin joins")
self.station.online = True
self.station.active = datetime.utcnow()
self.station.put()
logging.info("Station updated in datastore")
memcache.set(self._memcache_station_id, self.station)
logging.info("Station updated in memcache")
return extended_session