八、RabbitMQ-客户端源码之ChannelN

ChannelN是整个RabbitMQ客户端最核心的一个类了，其包含的功能点甚多，这里需要分类阐述。
首先来看看ChannelN的成员变量：

private final Map
   
     
      
     _consumers = Collections.synchronizedMap(new HashMap
    
      
       
     ());
private volatile Consumer defaultConsumer = null;
private final ConsumerDispatcher dispatcher;
private final Collection
     
       
        
       returnListeners = new CopyOnWriteArrayList
      
        
         
       ();
private final Collection
       
         
           flowListeners = new CopyOnWriteArrayList 
          
            (); private volatile CountDownLatch finishedShutdownFlag = null; private final Collection 
           
             confirmListeners = new CopyOnWriteArrayList 
            
              (); private long nextPublishSeqNo = 0L; private final SortedSet 
             
               unconfirmedSet = Collections.synchronizedSortedSet(new TreeSet 
              
                ()); private volatile boolean onlyAcksReceived = true;

源代码中有关ChannelN的呈现顺序有所不同，这里博主为了区分开来，重新排了序。