code: @Override
  	public int getSize()
      {
          int size = 0;
          synchronized (storeLock)
          {
              if (volatileStore != null)
                  size += volatileStore.size();
              if (persistentStore != null)
                  size += persistentStore.size();
          }
          return size;
      }
docs: /*
  (non-Javadoc)
  @see net.timewalker.ffmq4.local.destination.LocalDestinationMBean#getSize()