def check_trigger(self, trigger_id):
session = None
while True:
try:
session = get_session()
# Refresh trigger from new session
trigger = session.query(Trigger).filter_by(id=trigger_id).first()
log.debug('Trigger %d checking for stock %s > %s',
trigger.id, trigger.stock_symbol, trigger.trigger_value)
if trigger.state == Trigger.State.CANCELLED:
log.debug('Trigger %d cancelled!', trigger.id)
return
# Get a new quote for the stock
quote_client = get_quote_client()
quote = quote_client.get_quote(trigger.stock_symbol,
trigger.username)
log.debug('Trigger %d: %s => %s',
trigger.id, trigger.stock_symbol, quote)
# If quote is greater than trigger value, buy stock and remove trigger
if quote > trigger.trigger_value:
# buy the stock and update reserve balance
log.debug("Trigger %d activated: %s > %s",
trigger.id, quote, trigger.trigger_value)
return self.process_transaction(session, quote, trigger)
except Exception, e:
log.error('Trigger %d: %s : %s', trigger_id, type(e), e)
finally:
def run(self, username, stock_symbol, amount):
self.session = get_session()
user = self.session.query(User).filter_by(username=username).first()
if not user:
raise UserNotFoundError(username)
xml.log_error('BUY', 'username not found')
# Check for existing uncommitted transaction
if self.session.query(Transaction).filter_by(
user=user, operation='BUY', committed=False).count() > 0:
raise BuyTransactionActiveError()
xml.log_error('BUY', 'Outstanding Buy Exists')
# Getting stock quote
quote_client = get_quote_client()
quote = quote_client.get_quote(stock_symbol, username)
# Work out quantity of stock to buy, fail if not enough for one stock
amount = Money.from_string(amount)
quantity = amount_to_quantity(quote, amount)
if quantity == 0:
raise InsufficientFundsError()
price = quote * quantity
if user.account_balance < price:
raise InsufficientFundsError()
transaction = Transaction(user=user, quantity=quantity, operation='BUY',
stock_symbol=stock_symbol, stock_value=quote, committed=False)
self.session.add(transaction)
self.session.commit()
xml.log_transaction('BUY', transaction)
return xml.QuoteResponse(quantity=quantity, price=price)
def run(self, username, stock_symbol, money_amount):
# see if user exists
self.session = get_session()
user = self.session.query(User).filter_by(username=username).first()
if not user:
raise UserNotFoundError(username)
# Check for existing uncommitted transaction
if self.session.query(Transaction).filter_by(
user=user, operation='SELL', committed=False).count() > 0:
raise SellTransactionActiveError()
#set up client to get quote
quote_client = get_quote_client()
quoted_stock_value = quote_client.get_quote(stock_symbol, username)
# Work out quantity of stock to sell, fail if not enough for one stock
money_amount = Money.from_string(money_amount)
quantity_to_sell = amount_to_quantity(quoted_stock_value, money_amount)
if quantity_to_sell == 0:
raise InsufficientFundsError()
# see if the user owns the requested stock and has enough for request
records = self.session.query(StockPurchase).filter_by(
username=user.username, stock_symbol=stock_symbol).all()
if(len(records) > 1):
raise UnknownCommandError('Multiple StockPurchase for user %s: %d',
username, len(records))
if len(records) != 1 or records[0].quantity < quantity_to_sell:
raise InsufficientStockError()
price = quoted_stock_value * quantity_to_sell
# make transaction
self.trans = Transaction(username=user.username,
stock_symbol=stock_symbol, operation='SELL', committed=False,
quantity=quantity_to_sell, stock_value=quoted_stock_value)
# commit transaction after all actions for atomicity
self.session.add(self.trans)
self.session.commit()
xml.log_transaction('SELL', self.trans, status_message='success')
return xml.QuoteResponse(quantity=quantity_to_sell, price=price)
def run(self, username='', stock_symbol=''):
if not stock_symbol:
xml.log_error('QUOTE', 'No stock symbol given')
raise InvalidInputError('No stock symbol given')
if len(stock_symbol) > 4:
xml.log_error('QUOTE', 'stock symbol too long')
raise InvalidInputError('stock symbol too long: %d' % \
len(stock_symbol))
quote_client = get_quote_client()
quote = quote_client.get_quote(stock_symbol, username)
#create log
xml.log_event('QUOTE', username, stock_symbol)
return xml.QuoteResponse(quantity=1, price=quote)