class RuntimeBackendInit(webapp2.RequestHandler):
# contains a list of all connected ClawUser objects
allUsersList = []
def get(self):
self.__getConnectedUsers()
self.__setupSecureChannel()
self.__setupClientChannel()
# set shutdown hook
runtime.set_shutdown_hook(self.isShuttingDown)
def __setupSecureChannel(self):
self.secureChannel = PubnubChanListenerFactory(
gl.PUBLISH_KEY_CLAW_APP_SECURE,
gl.SUBSCRIBE_KEY_CLAW_APP_SECURE,
gl.SECRET_KEY_CLAW_APP_SECURE,
True,
'ClawComm',
self.secureCommCallback
)
def __setupClientChannel(self):
self.publishClient = Pubnub(gl.PUBLISH_KEY_PUBLIC, gl.SUBSCRIBE_KEY_PUBLIC, gl.SECRET_KEY_PUBLIC, False)
def __getConnectedUsers(self):
# Get existing claw users
# Query
self.allUsers = ClawUser().all()
self.allUsers.order("-timestamp")
self.allUsersList = self.allUsers.fetch(limit=gl.MAX_CONNECTIONS)
def __updateConnectedUsers(self):
for user in self.allUsersList:
print user.channel
def isShuttingDown(self):
# logging.info('shutdown hook called, trying to kill BackgroundThread---------')
self.secureChannel.destroy()
return True
def secureCommCallback(self, message):
logging.info(message['text'])
return True
def testBlocking(self):
while True:
logging.info(self, 'instance still alive')
time.sleep(2)
def get(self):
allUsers = ClawUser().all()
numusers = allUsers.count() #max 1000, not an issue in our case
if numusers < gl.MAX_CONNECTIONS:
hasher = hashlib.sha1()
hasher.update(str(time.time()))
channelid = hasher.hexdigest()[:20]
timestamp = datetime.now()
cu = ClawUser()
cu.channel = channelid
cu.timestamp = timestamp
cu.put() # may need TransactionFailedError handling later
j2_env = Environment(loader=FileSystemLoader('template'),
trim_blocks=True)
templateVars = {
"title" : "Claw Controller Client",
"channel" : channelid,
"timestamp" : timestamp,
"sub" : gl.SUBSCRIBE_KEY_PUBLIC,
"pub" : gl.PUBLISH_KEY_PUBLIC,
"ssl" : 'false',
"queuepos" : numusers
}
self.response.out.write( j2_env.get_template('in_queue2.html').render(templateVars) )
else:
# replace with jenga template later probably
self.response.out.write("<html><body>")
self.response.out.write("<p>Too many queued users, please retry laters</p>")
self.response.out.write("</body></html>")
def __getConnectedUsers(self):
# Get existing claw users
# Query
self.allUsers = ClawUser().all()
self.allUsers.order("-timestamp")
self.allUsersList = self.allUsers.fetch(limit=gl.MAX_CONNECTIONS)
