[GitHub] [shardingsphere] RaigorJiang commented on issue #8330: Create a built-in sharding algorithm SPI in 5.x, which allows users to directly configure the class name as in 4.x

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RaigorJiang commented on issue #8330:
URL: https://github.com/apache/shardingsphere/issues/8330#issuecomment-734189671


   Hi, everyone~(especially @terrymanu )
   I want to discuss the solution of this feature.
   
   There are 3 types of ShardingAlgorithm which users can expand:
   StandardShardingAlgorithm, ComplexKeysShardingAlgorithm and 
HintShardingAlgorithm.
   
   I hava two plans:
   
   1. If we provide only ONE SPI implementation, the class should  implement 
these three interfaces, and the configuration may like this :
   `# 分片算法配置
     shardingAlgorithms:
       <sharding-algorithm-name> (+): # 分片算法名称
         type: CLASS_BASED   # 分片算法类型
         props: # 分片算法属性配置
           strategy: standard
           preciseAlgorithmClassName: org.xxx.example.PreciseShardingAlgorithm
           rangeAlgorithmClassName: org.xxx.example.RangeShardingAlgorithm
       <sharding-algorithm-name> (+): # 分片算法名称
         type: CLASS_BASED   # 分片算法类型
         props: # 分片算法属性配置
           strategy: complex
           algorithmClassName: org.xxx.example.ComplexKeysShardingAlgorithm
       <sharding-algorithm-name> (+): # 分片算法名称
         type: CLASS_BASED   # 分片算法类型
         props: # 分片算法属性配置
           strategy: hint
           algorithmClassName: org.xxx.example.HintShardingAlgorithm
         # ...`
   
   2. We provide THREE SPI implementations, so their types can be different, 
and the configuration may like this : 
   `# 分片算法配置
     shardingAlgorithms:
       <sharding-algorithm-name> (+): # 分片算法名称
         type: CLASS_BASED_STANDARD   # 分片算法类型
         props: # 分片算法属性配置
           preciseAlgorithmClassName: org.xxx.example.PreciseShardingAlgorithm
           rangeAlgorithmClassName: org.xxx.example.RangeShardingAlgorithm
       <sharding-algorithm-name> (+): # 分片算法名称
         type: CLASS_BASED_COMPLEX   # 分片算法类型
         props: # 分片算法属性配置
           algorithmClassName: org.xxx.example.ComplexKeysShardingAlgorithm
       <sharding-algorithm-name> (+): # 分片算法名称
         type: CLASS_BASED_HINT   # 分片算法类型
         props: # 分片算法属性配置
           algorithmClassName: org.xxx.example.HintShardingAlgorithm
         # ...`
   
   
   I prefer to the second one, can you give some suggestions？
   Thanks!
   


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