code: protected synchronized void applyEntries(boolean blocking) throws IOException {
      if (blocking) { /* Blocking Mode */
        synchronized(_entryApply) {
          List<Entry<V>> entryList = new ArrayList<Entry<V>>();
          while(_entryPool.getServiceQueueSize() > 0) {
            Entry<V> entry = _entryPool.pollFromService();
            if(entry != null) entryList.add(entry);
          }
          
          applyEntries(entryList);
        }
      } else {        /* Non-Blocking Mode */
        synchronized(_entryApply) {
          for(int i = 0; i < _maxEntries; i++) {
            Entry<V> entry = _entryPool.pollFromService();
            if(entry != null) _entryApply.add(entry);
          }
        }
        
        // Start a separate thread to update the underlying array file 
        new Thread(_entryApply).start();
      }
    }
docs: Apply accumulated entries to the array file.
  @throws IOException