+ private Collection<PostReply> getRepliesFrom(String id) {
+ lock.readLock().lock();
+ try {
+ if (sonePostReplies.containsKey(id)) {
+ return Collections.unmodifiableCollection(sonePostReplies.get(id));
+ }
+ return Collections.emptySet();
+ } finally {
+ lock.readLock().unlock();
+ }
+ }
+
+ /** Loads the known post replies. */