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app.py
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app.py
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#!/usr/bin/env python
import datetime
import random
import time
import urllib.error
import urllib.parse
import urllib.request
from collections import deque
import tornado.escape
import tornado.gen
import tornado.ioloop
import tornado.platform.twisted
import tornado.web
import tornado.websocket
from tornado.httpclient import AsyncHTTPClient, HTTPRequest
# install this before importing anything else, or VERY BAD THINGS happen
tornado.platform.twisted.install()
from txcouchbase.bucket import Bucket
import cb_status
import settings
socket_list = []
bucket_name = settings.BUCKET_NAME
user = settings.USERNAME
password = settings.PASSWORD
node = settings.CLUSTER_NODES[0]
bucket = Bucket('couchbase://{0}/{1}'.format(node, bucket_name),
username=user, password=password)
bucket.n1ql_timeout = 3
fts_nodes = None
fts_enabled = False
nodes = []
n1ql_enabled = False
xdcr_enabled = False
price_data = {}
portfolio_cache = []
class ExchangeHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def get(self):
company_list = yield bucket.get(settings.PRODUCT_LIST)
stocks = yield bucket.get_multi(company_list.value['symbols'])
r = yield bucket.n1qlQueryAll(
"SELECT distinct sector from {} where sector IS NOT MISSING".format(bucket_name))
sectors = []
for row in r:
sectors.append(row['sector'])
sectors = sorted(sectors)
first_keys = []
rest = []
for stock, stock_doc in stocks.items():
if stock_doc.value['priority'] == 1:
first_keys.append(stock)
else:
rest.append(stock)
random.shuffle(first_keys)
random.shuffle(rest)
keys = first_keys + rest
self.render("www/exchange.html", stocks=stocks, keys=keys, sectors=sectors)
class LatestOrdersHandler(tornado.web.RequestHandler):
def get(self):
self.render("www/orders.html")
class StockLeaderboardHandler(tornado.web.RequestHandler):
def get(self):
self.render("www/stock_performance.html")
class InvestorLeaderboardHandler(tornado.web.RequestHandler):
def get(self):
self.render("www/investor_performance.html")
class GeoLeaderboardHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def get(self):
base_query = "SELECT portfolio.symbol, doc.name, portfolio.purchase_price, portfolio.quantity from {} as doc \
UNNEST doc.`order` as portfolio \
{} \
ORDER BY portfolio.symbol"
geo_data = {}
for geo in ["USA", "EU", "Unknown"]:
if geo == "Unknown":
where_clause = "where doc.`type`=='order' AND doc.`geo` IS MISSING"
else:
where_clause = "where doc.`type`=='order' AND doc.`geo` == '{}'".format(geo)
query_res = yield bucket.n1qlQueryAll(base_query.format(bucket_name, where_clause))
investments = []
grand_total = 0
for row in query_res:
profit = (row['quantity'] * price_data[row['symbol']]['price']) - 100
row['profit'] = round(profit, 2)
row['quantity'] = round(row['quantity'], 2)
grand_total += profit
investments.append(row)
if investments:
geo_data[geo] = {"total": round(grand_total, 2), "investments": investments}
self.render("www/geo_leaderboard.html", prices=price_data, geo_data=geo_data)
class ClusterVisHandler(tornado.web.RequestHandler):
def get(self):
self.render("www/visualiser.html")
class CBStatusWebSocket(tornado.websocket.WebSocketHandler):
def open(self):
self.NAME = "CB Status"
if self not in socket_list:
socket_list.append(self)
self.red = 255
print(("{} WebSocket opened").format(self.NAME))
self.callback = tornado.ioloop.PeriodicCallback(
self.get_node_status, 1000)
self.callback.start()
self.get_node_status()
def on_message(self, message):
print(("{} received: {}").format(self.NAME, message))
def on_close(self):
print(("{} WebSocket closed").format(self.NAME))
self.callback.stop()
def get_node_status(self):
msg = {"nodes": nodes, 'fts': fts_enabled,
'n1ql': n1ql_enabled, 'xdcr': xdcr_enabled}
self.write_message(msg)
class LiveOrdersWebSocket(tornado.websocket.WebSocketHandler):
def open(self):
self.RECENT_ORDERS = deque(maxlen=50)
self.NEXT_CUSTOMER = 0
self.PORTFOLIO_INDEX = 0
self.NAME = "Live Orders"
if self not in socket_list:
socket_list.append(self)
print(("{} WebSocket opened").format(self.NAME))
self.callback = tornado.ioloop.PeriodicCallback(self.send_orders,
2000)
self.callback.start()
self.send_orders()
def on_message(self, message):
print(("{} received: {}").format(self.NAME, message))
def on_close(self):
print(("{} WebSocket closed").format(self.NAME))
self.callback.stop()
@tornado.gen.coroutine
def send_orders(self):
if len(portfolio_cache) > self.PORTFOLIO_INDEX:
self.RECENT_ORDERS.extendleft(portfolio_cache[self.PORTFOLIO_INDEX:])
self.PORTFOLIO_INDEX = len(portfolio_cache)
if len(self.RECENT_ORDERS) > 0:
display_order = self.RECENT_ORDERS.pop()
msg = {"name": display_order['name'], "order": display_order['order']}
self.write_message(msg)
if display_order['name'] == 'Couchbase Demo Phone' and self.NEXT_CUSTOMER == 0:
self.callback.stop()
yield tornado.gen.sleep(2)
self.callback.start()
class StockLeaderboardWebSocket(tornado.websocket.WebSocketHandler):
def open(self):
self.NAME = "Stock Leaderboard"
if self not in socket_list:
socket_list.append(self)
print(("{} WebSocket opened").format(self.NAME))
self.callback = tornado.ioloop.PeriodicCallback(self.send_leaderboard,
5000)
self.callback.start()
self.send_leaderboard()
def on_message(self, message):
print(("{} received: {}").format(self.NAME, message))
def on_close(self):
print(("{} WebSocket closed").format(self.NAME))
self.callback.stop()
@tornado.gen.coroutine
def send_leaderboard(self):
base_query = 'SELECT price_diff,symbol,company,starting_price,price from {} \
LET price_diff = 100 * ((price - starting_price))/starting_price \
WHERE symbol is not MISSING \
ORDER BY price_diff {} \
LIMIT 10'
try:
best_results = yield bucket.n1qlQueryAll(base_query.format(bucket_name, "DESC"))
except Exception:
return
good_performers = []
for row in best_results:
good_performers.append(row)
worst_results = yield bucket.n1qlQueryAll(base_query.format(bucket_name, ""))
poor_performers = []
for row in worst_results:
poor_performers.append(row)
self.write_message({"best": good_performers, "worst": poor_performers})
class InvestorLeaderboardWebSocket(tornado.websocket.WebSocketHandler):
def open(self):
self.NAME = "Investor Leaderboard"
if self not in socket_list:
socket_list.append(self)
print(("{} WebSocket opened").format(self.NAME))
self.callback = tornado.ioloop.PeriodicCallback(self.send_leaderboard,
5000)
self.callback.start()
self.send_leaderboard()
def on_message(self, message):
print(("{} received: {}").format(self.NAME, message))
def on_close(self):
print(("{} WebSocket closed").format(self.NAME))
self.callback.stop()
@tornado.gen.coroutine
def send_leaderboard(self):
global portfolio_cache
list_to_sort = [(portfolio["current_value"], portfolio) for portfolio in portfolio_cache]
list_to_sort.sort(reverse=True)
sorted_portfolios = [portfolio for (key, portfolio) in list_to_sort]
best_performers = sorted_portfolios[:5]
worst_performers = sorted_portfolios[-5:]
self.write_message({"best": best_performers, "worst": worst_performers})
class LivePricesWebSocket(tornado.websocket.WebSocketHandler):
def open(self):
self.NAME = "Live Prices"
if self not in socket_list:
socket_list.append(self)
print(("{} WebSocket opened").format(self.NAME))
self.callback = tornado.ioloop.PeriodicCallback(self.send_prices,
5000)
self.callback.start()
self.send_prices()
def on_message(self, message):
self.write_message(price_data)
def on_close(self):
print(("{} WebSocket closed").format(self.NAME))
self.callback.stop()
@tornado.gen.coroutine
def send_prices(self):
self.write_message(price_data)
class SubmitHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def post(self):
data = tornado.escape.json_decode(self.request.body)
# Someone has sent us an invalid order, send a 400
if 'name' not in data or 'order' not in data or \
('order' in data and len(data['order']) != 5):
self.send_error(400)
return
key = "Order::{}::{}".format(data['name'],
datetime.datetime.utcnow().isoformat())
data['ts'] = int(time.time())
data['type'] = "order"
order = []
for i in range(0, 5):
stock = data['order'][i]
purchase_price = float(price_data[stock[6:]]['price'])
quantity = 100.0 / purchase_price
d = {'symbol': stock[6:], 'purchase_price': purchase_price, 'quantity': quantity}
order.append(d)
data['order'] = order
yield bucket.upsert(key, data)
class SearchHandler(tornado.web.RequestHandler):
http_client = AsyncHTTPClient()
@tornado.gen.coroutine
def get(self):
if fts_nodes:
query = self.get_query_argument('q')
query = query.replace('"', r'')
query = urllib.parse.quote(query)
terms = query.split()
query = ' '.join(["{}~1".format(term) for term in terms])
data = '{"query": {"query": "' + query + '"}, "highlight": null, "fields": null, "facets": null, "explain": false}'
fts_node = random.choice(fts_nodes)
request = HTTPRequest(
url='http://{}:8094/api/index/cbex/query'.format(fts_node),
method='POST', body=data, auth_username=settings.ADMIN_USER,
auth_password=settings.ADMIN_PASS, auth_mode='basic',
headers={'Content-Type': 'application/json'})
response = yield self.http_client.fetch(request)
response = tornado.escape.json_decode(response.body)
final_results = []
for hit in response['hits']:
final_results.append(hit['id'])
self.write({'keys': final_results})
else:
raise Exception('No FTS node found')
class FilterHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def get(self):
data = self.get_query_argument('type')
results = yield bucket.n1qlQueryAll(
'SELECT meta().id FROM {} WHERE sector = "{}"'
.format(bucket_name, data))
final_results = []
for row in results:
final_results.append(row['id'])
self.write({'keys': final_results})
@tornado.gen.coroutine
def update_cb_status():
global nodes, fts_enabled, n1ql_enabled, xdcr_enabled, fts_nodes
# Update the cached node info every 500ms
while True:
nodes = yield cb_status.get_node_status()
n1ql_enabled = yield cb_status.n1ql_enabled()
xdcr_enabled = yield cb_status.xdcr_enabled()
fts_nodes = yield cb_status.fts_nodes()
fts_enabled = yield cb_status.fts_enabled()
yield tornado.gen.sleep(0.5)
@tornado.gen.coroutine
def update_price_data():
global price_data, portfolio_cache
LATEST_TS = 0
while True:
call_time = time.time()
try:
results = yield bucket.n1qlQueryAll(
'SELECT symbol,price,starting_price FROM {} WHERE symbol IS NOT MISSING AND price IS NOT MISSING'.format(
bucket_name, ))
except Exception:
continue
final_results = {}
for row in results:
price_change = round(
((float(row['price']) - float(row['starting_price'])) * 100) / float(row['starting_price']), 2)
price_data[row['symbol']] = {'price': float(row['price']), 'change': price_change}
query = "SELECT * FROM {} WHERE type='order' and ts > {} ORDER BY ts ASC LIMIT 50;".format(bucket_name,
LATEST_TS)
try:
res = yield bucket.n1qlQueryAll(query)
except Exception:
tornado.gen.sleep(2)
continue
new_order = False
for order in res:
order = order[bucket_name]
portfolio_cache.append(order)
LATEST_TS = int(order['ts'])
print(("New Order: ", order['name'], order['ts']))
for portfolio in portfolio_cache:
portfolio_value = 0
for stock in portfolio['order']:
current_price = price_data[stock['symbol']]['price']
quantity = stock['quantity']
stock_value = quantity * current_price
portfolio_value += stock_value
portfolio['current_value'] = portfolio_value
result_time = time.time()
response_time = result_time - call_time
if response_time < 5: # don't go again til 5s has elaspsed
yield tornado.gen.sleep(5 - response_time)
def make_app():
return tornado.web.Application([
(r"/", ExchangeHandler),
(r"/orders", LatestOrdersHandler),
(r"/stocks", StockLeaderboardHandler),
(r"/investors", InvestorLeaderboardHandler),
(r"/geo", GeoLeaderboardHandler),
(r"/nodestatus", CBStatusWebSocket),
(r"/liveorders", LiveOrdersWebSocket),
(r"/liveprices", LivePricesWebSocket),
(r"/stockleaderboard", StockLeaderboardWebSocket),
(r"/investorleaderboard", InvestorLeaderboardWebSocket),
(r'/cluster', ClusterVisHandler),
(r'/submit_order', SubmitHandler),
(r'/search', SearchHandler),
(r'/filter', FilterHandler),
# This is lazy, but will work fine for our purposes
(r'/(.*)', tornado.web.StaticFileHandler, {'path': "./www/"}),
], debug=True)
if __name__ == "__main__":
port = settings.WEB_PORT
print(("Running at http://localhost:{}").format(port))
app = make_app()
app.listen(port)
tornado.ioloop.IOLoop.current().spawn_callback(update_cb_status)
tornado.ioloop.IOLoop.current().spawn_callback(update_price_data)
tornado.ioloop.IOLoop.current().start()