Map nameMap = (Map)nameMaps.get(this.nodeId);
Map nameMap = (Map)nameMaps.get(new Integer(this.nodeId));
   public Binding getBindingForQueueName(String queueName) throws Exception   {          if (queueName == null)      {         throw new IllegalArgumentException("Queue name is null");      }            lock.readLock().acquire();            try      {         Map nameMap = (Map)nameMaps.get(this.nodeId);                  Binding binding = null;                  if (nameMap != null)         {            binding = (Binding)nameMap.get(queueName);         }                  return binding;      }      finally      {         lock.readLock().release();      }   }