def video_feed():
#print(reader_dict)
topic_path = "persistent://" + request.args['tenant'] + '/' + request.args['namespace'] + '/' + request.args['topic']
#print(topic_path)
if(request.args['namespace'] == 'raw-video'): topic_frame = Frame
elif(request.args['namespace'] == 'processed-video'): topic_frame = YOLOFrame
elif(request.args['namespace'] == 'text'): topic_frame = TextFrame
if(request.args['cursor'] == 'latest'): topic_cursor = MessageId.latest
elif(request.args['cursor'] == 'earliest'): topic_cursor = MessageId.earliest
else:
print(request.args['cursor'])
#result = influx_client.query("SELECT * FROM amount_of_people WHERE time >= '{}' LIMIT 1".format(request.args['cursor']))
#print(result)
#result = list(result)[0][0]
#print(result)
#cursor_string = result['cursor']
#print(result['time'])
#print(cursor_string)
#print(bytes.fromhex(cursor_string))
#print(MessageId.deserialize(bytes.fromhex(cursor_string)))
topic_cursor = MessageId.deserialize(bytes.fromhex(request.args['cursor']))
#print(topic_cursor)
reader = None
username = request.args['username']
if(username in reader_dict.keys() and reader_dict[username]['topic']==topic_path and reader_dict[username]['cursor_name']==request.args['cursor']):
#print("reader {} {}".format(reader_dict[username]['cursor_name'],reader_dict[username]['topic']))
reader = reader_dict[username]['reader']
else:
print("create reader {} {} {}".format(request.args['cursor'],request.args['namespace'],request.args['topic']))
if(reader):
reader.close()
print("close reader")
del reader_dict[username]
time.sleep(10)
reader_obj = {}
reader_obj['topic'] = topic_path
reader_obj['cursor_name'] = request.args['cursor']
reader_obj['cursor'] = topic_cursor
reader = client.create_reader(topic=topic_path,
start_message_id=topic_cursor,
receiver_queue_size=5000,
schema=AvroSchema(topic_frame)
)
reader_obj['reader'] = reader
reader_dict[username] = reader_obj
return get_video_stream(username,request.args['namespace'])
def test_message_id(self):
s = MessageId.earliest.serialize()
self.assertEqual(MessageId.deserialize(s), MessageId.earliest)
s = MessageId.latest.serialize()
self.assertEqual(MessageId.deserialize(s), MessageId.latest)
def test_message_id(self):
s = MessageId.earliest.serialize()
self.assertEqual(MessageId.deserialize(s), MessageId.earliest)
s = MessageId.latest.serialize()
self.assertEqual(MessageId.deserialize(s), MessageId.latest)