@Override
 public boolean flushEntry(IFileSpec entry) {
   boolean result = _cache.flushEntry(entry);
   int key = _cache.getCacheKey(entry).getKey();
   if (result) {
     log(String.format("Flushed %s: %d", entry.getPreferredPathString(), key));
   } else {
     log(String.format("Could not flush %s: %d", entry.getPreferredPathString(), key));
   }
   return result;
 }