Blog :: New Narayana release and Spring Boot quickstart :: Sell operation

sell.java

@DeleteMapping("/portfolio/{username}/{symbol}")
@Transactional
public void sell(@PathVariable String username, @PathVariable String symbol, @RequestParam("amount") int amount) {
    User user = getUser(username);
    Share share = getShare(symbol);
    PortfolioEntry portfolioEntry = getPortfolioEntry(user, share);

    updateBudget(user, amount * share.getPrice()); // Increase user's budget
    updateSharesAmount(share, amount); // Increase shares amount available for sale
    updatePortfolioEntry(portfolioEntry, -1 * amount); // Decrease shares amount owned by the user
    sendUpdate(String.format("'%s' just sold %d shares of '%s' for the amount of %d", username, amount, symbol,
            amount * share.getPrice()));
}