+++
pre = "<b>5. </b>"
title = "Dev Manual"
weight = 5
chapter = true
+++

Apache ShardingSphere provides dozens of SPI based extensions. 
it is very convenient to customize the functions for developers.

This chapter lists all SPI extensions of Apache ShardingSphere.
If there is no special requirement, users can use the built-in implementation provided by Apache ShardingSphere; 
advanced users can refer to the interfaces for customized implementation.

Apache ShardingSphere community welcomes developers to feed back their implementations to the [open-source community](https://github.com/apache/shardingsphere/pulls), 
so that more users can benefit from it.
