Module 8 job

【 Business 】

Design messages to store message data Mysql Table for

【 Job requirements 】

1. Include table name 、 Field 、 Indexes

2. Use words to describe the design ideas and reasons , for example ： Why design an index

3. You need to consider a queue and a table , Or all messages are put in a table with a queue name field

The table is designed as follows ：

An overview of queue metadata , Then a queue corresponds to a message table ：

The metadata table of the queue （ Main table ）：

• Primary key ID

• Queue name

• Queue type （1: Point to point ,2: radio broadcast ）

• Number of messages to be consumed

• Creation time

• Update time

Message table of queue （ Sub table ）：

• Primary key ID

• News key

• Message state ：-1: Consumption failure ,0: To be consumed ,1: Consumption success

• Message body

• Creation time

• Update time

Design skills and benefits ：

Use the queue name as the prefix of the message table , Create different message tables .

Messages from different message queues can be stored separately , And can extend the message features of their respective features , Like delayed messages 、 Broadcast news 、 Dead letter news, etc .