public void commitTransaction(Transaction trans) {
String process = trans.getProcess();
Trader trader = trans.getTrader();
int qty = trans.getQty();
double price = trans.getPrice();
double balance = trader.getBalance();
if (process.equals("sell")) balance = balance - qty * price - 5;
else balance = balance + qty * price - 5;
trans.setStatus("success");
trader.setBalance(balance);
trader.setTransaction(trans);
traderD.save(trader);
}
public void addStock(Stock stock) {
stockD.save(stock);
}
public void failTransaction(int trans_id) {
Transaction trans = transD.findBy("trans_id", trans_id);
trans.setStatus("reject");
transD.save(trans);
}