public final class DaoService {
    @Autowired
    private ConnectionPool pool;

    public void updateTimestamp(long id) {
        perform(conn -> {
            if (!conn.recordExists(id))
                create(id);

            conn.updateTimestamp(id, System.currentTimeMillis());
        });
    }

    private void create(long id) {
        try {
            perform(conn -> conn.createRecord(id));
        }
        catch (DuplicateKeyException ex) {
            // ignored
        }
    }

    private void perform(Consumer<Connection> c) {
        Connection conn = pool.borrowConnection();
        try {
            c.accept(conn);
        }
        finally {
            pool.returnConnection(conn);
        }
    }
}