Super easy to use rabbitmq message 100% delivery solution!

Program ape Owen 2021-01-20 21:32:06
super easy use rabbitmq message

One 、 Preface

Now most of them use MQ To make the system heterogeneous , To decouple the system , The module of the system is equivalent to the sender and receiver ,MQ It plays the role of post office . As a transit role , You need to make sure that the message 100% The delivery .

Today we're going to study how to make sure that the news 100% Delivery of . Put together a copy of Java Interview book full version PDF

Two 、 Let's talk about RabbitMQ Characteristics of

RabbitMQ The assurance is : As long as you deliver the message to Broker in , Then I'll make sure that the message reaches the consumers .

Of course, there are preconditions , such as :

  1. You need to respond manually ,

  2. Minimum Broker Don't hang up , And the message is persisted .

combination RabbitMQ To make an analysis , For the delivery end , We just need to make sure that the message is sent to Broker Then you can , So how to ensure reliability , In the following steps :

  1. The message was successfully sent out

  2. Guarantee Broker Successfully received the news

  3. The producer received Broker The confirmation response

  4. Message compensation mechanism , All three steps are kneeling , Make a compensation retransmission mechanism

  5. The last barrier , If there are too many retries in step 4 , So there's something wrong with the system , We need human intervention

Just do the five steps above , Basically we can guarantee , Message delivery 100% Send it out . in addition , Official account Java Technology stack , Reply in the background : interview , I can get the RabbitMQ A series of interview questions and answers , Very complete .

3、 ... and 、 The guarantee of the reliability of the producer's delivery

3.1 Let's start with the diagram


3.2 As for the above illustration , Let's step by step analyze

  • step1: Data in the database , This step is necessary

  • step2: Put the message in the library , And the initialization state is 0 ( In sending )

  • step3: Deliver the message to Broker in

  • step4:Broker Send successful response

  • step5: The producer gets a successful response , Modify message status to 1:( Send successfully ) All of the above are normal processes , Let's talk about the abnormal solution mechanism :

  • step6: Periodically check whether the status of the message is 1

  • step7: If step6 The status of the message for is still 0 , Then go to resend , repeat .........

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