public void modify(long orderId, long size) {
    Order order = orders.get(orderId);
    if (order == null) {
      return;
    }

    OrderBook book = order.getOrderBook();

    long newSize = Math.max(0, size);

    boolean bbo =
        book.update(order.getSide(), order.getPrice(), newSize - order.getRemainingQuantity());

    if (newSize == 0) {
      orders.remove(orderId);
    } else {
      order.setRemainingQuantity(newSize);
    }

    listener.update(book, bbo);
  }
public void modify ( long orderId , long size ) { Order order = orders . get ( orderId ) ; if ( order == null ) { return ; } OrderBook book = order . getOrderBook ( ) ; long newSize = Math . max ( 0 , size ) ; boolean bbo = book . update ( order . getSide ( ) , order . getPrice ( ) , newSize - order . getRemainingQuantity ( ) ) ; if ( newSize == 0 ) { orders . remove ( orderId ) ; } else { order . setRemainingQuantity ( newSize ) ; } listener . update ( book , bbo ) ; }
Modify an order in an order book. The order will retain its time priority. If the new size is
zero, the order is deleted from the order book.

<p>An update event is triggered.

<p>If the order identifier is unknown, do nothing.

@param orderId the order identifier
@param size the new size