public static int conn_create_tp_queue_size() {
        return getInt(Configs.CONN_CREATE_TP_QUEUE_SIZE, Configs.CONN_CREATE_TP_QUEUE_SIZE_DEFAULT);
    }
get configs through system properties prior to default value

@author tsui
@version $Id: ConfigManager.java, v 0.1 2017-08-03 19:21 tsui Exp $
src/main/java/com/alipay/remoting/config/ConfigManager.java