}
void addFriend(String localSoneId, String friendSoneId) {
+ loadFriends(localSoneId);
lock.writeLock().lock();
try {
if (soneFriends.put(localSoneId, friendSoneId)) {
}
void removeFriend(String localSoneId, String friendSoneId) {
+ loadFriends(localSoneId);
lock.writeLock().lock();
try {
if (soneFriends.remove(localSoneId, friendSoneId)) {