public void unlockEntry(Object locker) throws IOException {
   IArchiveLockManager lockManager = ArchiveLockManager.getInstance();
   lockManager.unlock(locker);
 }
 public Object lockEntry(String entry) throws IOException {
   String path = ArchiveUtil.generateFullPath(folderName, entry + ".lck");
   IArchiveLockManager lockManager = ArchiveLockManager.getInstance();
   return lockManager.lock(path);
 }