@Override
public synchronized void watch(Folder folder, FolderObserver observer) {
Preconditions.checkState(
mailClientHandler.isLoggedIn(), "Can't execute command because client is not logged in");
checkCurrentFolder(folder);
Preconditions.checkState(
mailClientHandler.idleRequested.compareAndSet(false, true), "Already idling...");
// This MUST happen in the following order, otherwise send() may trigger a new mail event
// before we've registered the folder observer.
mailClientHandler.observe(observer);
channel.write(sequence.incrementAndGet() + " idle\r\n");
}
