public void ensureStarted() {
if (watcher != null) {
return;
}
if (!folder.toFile().exists()) {
return;
}
if (isMac()) {
watcher = new OsxWatchService(folder);
} else {
watcher = new JdkWatchService(folder);
}
watcher.onChange(listener);
}
public void stop() {
if (watcher != null) {
watcher.stop();
}
}