+\r
+ private void purgeLogFiles(File dir) {\r
+ long exptime = System.currentTimeMillis() - interval;\r
+ for (File logfile : Objects.requireNonNull(dir.listFiles())) {\r
+ if (logfile.lastModified() < exptime) {\r
+ logfile.delete();\r
+ }\r
+ }\r
+ }\r