readme.md

canalx-select-db-json

Fetch MYSQL's data to K-V style data.

通过配置化的SQL语句将 Mysql 中的数据读取到内存中，形成 KV 格式。

quick start

note: json encoding is using Jackson.

config

<?xml version="1.0" encoding="UTF-8"?>

<configuration>
    <base>
        <driverClass>com.mysql.jdbc.Driver</driverClass>
    </base>

    <dbs dbUrl="jdbc:mysql://localhost:3306?useUnicode=true&amp;characterEncoding=UTF-8&amp;zeroDateTimeBehavior=convertToNull&amp;allowMultiQueries=true"
         name="test"
         userName="root" password="123456">
        <db>
            <table keyId="id" name="user" initSql="select * from test.user"/>
        </db>

        <db name="test2"
            dbUrl="jdbc:mysql://localhost:3306?useUnicode=true&amp;characterEncoding=UTF-8&amp;zeroDateTimeBehavior=convertToNull&amp;allowMultiQueries=true"
            userName="root" password="123456">
            <table keyId="id" name="store" initSql="select * from test2.store"/>
        </db>
    </dbs>

</configuration>

code:

@Test
public void test() {

    IDbFetchController dbFetchController = DbFetchControllerFactory.getDefaultDbController();
    
    dbFetchController.init("canalx-db-kv.xml");
    Map<String, Map<String, String>> dbKvs = dbFetchController.getInitDbKv();

    for (String tableId : dbKvs.keySet()) {

        System.out.println("table identify: " + tableId);
        System.out.println("table kv:" + dbKvs.get(tableId));
    }
}

result

table identify: test2.store
table kv:{1={"id":1,"name":"product1","products":100}}
table identify: test.user
table kv:{1={"id":1,"name":"user1","phone":"123456789"}}

Maven

<dependency>
    <groupId>com.github.knightliao.canalx</groupId>
    <artifactId>canalx-select-db-json</artifactId>
    <version>0.0.2</version>
</dependency>