Extra bits related to persistence

Main6.java

private static final String SQL = "INSERT INTO SALES (BUYER_NAME, SELLER_NAME, PRODUCT_ID, PRICE, QUANTITY, PO_ID, SO_ID) VALUES (?, ?, ?, ?, ?, ?, ?)";

private static final ConnectionPool<MySQLConnection> POOL;
static {
    Duration connectTimeout = Duration.apply(5.0, TimeUnit.SECONDS);
    Duration testTimeout = Duration.apply(5.0, TimeUnit.SECONDS);
    Configuration configuration = new Configuration("root", Main.DB_HOST, 3306, Option.apply("password"), Option.apply("TRADER"), io.netty.util.CharsetUtil.UTF_8, 16777216, PooledByteBufAllocator.DEFAULT, connectTimeout, testTimeout);
    
    MySQLConnectionFactory factory = new MySQLConnectionFactory(configuration);
    POOL = new ConnectionPool<MySQLConnection>(factory, new PoolConfiguration(1000, 4, 1000, 4000), Main.system.dispatcher());
}


private static interface PersistenceComplete {
    void apply(Throwable failure);
}