ExtendedRollingFileAppender.java 文件源码

protected void subAppend(LoggingEvent event) {
  if (event.getLevel().toInt() <= currentLevel) {
    super.subAppend(event);
    if (fileName != null && qw != null) {
      long size = ((CountingQuietWriter) qw).getCount();
      if (size >= maxFileSize && size >= nextRollover) {
        rollOver();
      }
    }
  }
}