/**
* Will move: messages.log.1 -> messages.log.2 messages.log -> messages.log.1
*
* <p>Will delete (if exists): messages.log.2
*/
private void moveAwayFile() {
File oldLogFile =
new File(file.getParentFile(), file.getName() + "." + NUMBER_OF_OLD_LOGS_TO_KEEP);
if (fileSystem.fileExists(oldLogFile)) {
fileSystem.deleteFile(oldLogFile);
}
for (int i = NUMBER_OF_OLD_LOGS_TO_KEEP - 1; i >= 0; i--) {
oldLogFile = new File(file.getParentFile(), file.getName() + (i == 0 ? "" : ("." + i)));
if (fileSystem.fileExists(oldLogFile)) {
try {
fileSystem.renameFile(
oldLogFile, new File(file.getParentFile(), file.getName() + "." + (i + 1)));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
