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                            >[info] MQ-最終―致性

最終一致性事務需要解決的主要難點：

**生產者：**

1 消息百分百投遞成功

*   結合comfirm機制

**消費者：**

2 消息百分百消費成功

*   結合ACK機制
*   并且要解決冪等性問題

*****
1. ### **什么是Confirm機制?**

概念：

Pro發送消息到Broker,Broker接收到消息后,產生回送響應。Pro中有一個Confirm Listener異步監聽響應應答

步驟：

*   消息的確認：Pro投遞消息后,如果Broker收到消息,則會給Pro一個應答
    
*   Pro接收應答：用來確定這條消息是否正常地發送到Broker,該法也是消息可靠性投遞的核心保障!

![](https://img.kancloud.cn/6b/73/6b7347952ace4a479e4662f949c13903_1020x580.png)

![](https://img.kancloud.cn/e7/1e/e71e48237a38309c98e98688b51e4213_981x653.png)
* 
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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