@Override
        public void log(InternalLogLevel level, String format, Object argA, Object argB) {
            if (level == null) {
                return;
            }
            switch (level) {
                case TRACE:
                    trace(format, argA, argB);
                    break;
                case DEBUG:
                    debug(format, argA, argB);
                    break;
                case INFO:
                    info(format, argA, argB);
                    break;
                case WARN:
                    warn(format, argA, argB);
                    break;
                case ERROR:
                    error(format, argA, argB);
                    break;
            }
        }
@author Robert HG (254963746@qq.com) on 11/5/15.
lts-core/src/main/java/com/github/ltsopensource/remoting/netty/NettyLogger.java