Shadow DB

<shadow:algorithm />

Create production and shadow data sources.

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:shadow="http://shardingsphere.apache.org/schema/shardingsphere/shadow" xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://shardingsphere.apache.org/schema/shardingsphere/shadow
                           http://shardingsphere.apache.org/schema/shardingsphere/shadow/shadow.xsd
                           ">
        <props>
            <prop key="operation">insert</prop>
            <prop key="column">user_id</prop>
            <prop key="value">1</prop>
    </shadow:shadow-algorithm>
    <shadow:rule id="shadowRule">
        <shadow:data-source id="shadow-data-source" production-data-source-name="ds" shadow-data-source-name="ds_shadow"/>
        <shadow:shadow-table name="t_user" data-sources="shadow-data-source">
            <shadow:algorithm shadow-algorithm-ref="user-id-insert-match-algorithm" />
        </shadow:shadow-table>
    </shadow:rule>