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Sharding-Sphere 3.X 與spring與mybatis集成(分庫分表)demo

sharding jdbc 分庫分表

最近在弄這個sharding-sphere,公司內部分庫分表是在此業務代碼上進行邏輯分庫分表,但是這種總是不好,也調研了幾款分庫分表中間件、mycat、網易cetus、阿裏DRDS、這幾種就是背景強大,大公司經過大量的實戰,成熟度很高,而框架sharding-sphere比較輕量級,最近比較火,它是以jar包形式提供服務,可以無縫連接ORM框架,並不需要額外的部署,不需要依賴,運維可以不需要改動,很多人都把sharding-sphere當成增強版的jdbc驅動,遷移代碼其實沒那麽復雜。對於巨頭公司,公司內部都會有自己研發的組件,中間件,來供整個公司使用,對於中小型公司,需要使用開源的中間件來支撐公司業務發展。

sharding-sphere-examples網址:
https://github.com/growup818/spring-learning-examples

sharding-sphere文檔:
http://shardingsphere.io/document/cn/features/

個人建議,還是以官方文檔為主,官方文檔例子都很全,文檔也很清楚,運行也都沒問題,不要去搜網上的demo。但是有一點建議一下,可以看著官網的examples,根據公司的代碼框架寫個簡單的demo什麽的,可以運行。

sql腳本:

/*
Navicat MySQL Data Transfer

Source Server         : 10.1.90.25-dev
Source Server Version : 50720
Source Host           : 10.1.90.25:3307
Source Database       : separate_entity_1

Target Server Type    : MYSQL
Target Server Version : 50720
File Encoding         : 65001

Date: 2018-05-28 18:04:42
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for t_order_0
-- ----------------------------
DROP TABLE IF EXISTS `t_order_0`;
CREATE TABLE `t_order_0` (
  `order_id` bigint(20) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `status` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Table structure for t_order_1
-- ----------------------------
DROP TABLE IF EXISTS `t_order_1`;
CREATE TABLE `t_order_1` (
  `order_id` bigint(20) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `status` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Table structure for t_order_item_0
-- ----------------------------
DROP TABLE IF EXISTS `t_order_item_0`;
CREATE TABLE `t_order_item_0` (
  `order_item_id` bigint(20) NOT NULL ,
  `order_id` bigint(20) DEFAULT NULL,
  `user_id` int(11) NOT NULL,
  PRIMARY KEY (`order_item_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Table structure for t_order_item_1
-- ----------------------------
DROP TABLE IF EXISTS `t_order_item_1`;
CREATE TABLE `t_order_item_1` (
  `order_item_id` bigint(20) NOT NULL,
  `order_id` bigint(20) DEFAULT NULL,
  `user_id` int(11) NOT NULL,
  PRIMARY KEY (`order_item_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

database.properties 配置文件

sharding.jdbc.datasource.names=separate_entity_0,separate_entity_1

sharding.jdbc.datasource.separate_entity_0.url=jdbc:mysql://127.0.0.1:3307/separate_entity_0
sharding.jdbc.datasource.separate_entity_0.username=root
sharding.jdbc.datasource.separate_entity_0.password=

sharding.jdbc.datasource.separate_entity_1.url=jdbc:mysql://127.0.0.1:3307/separate_entity_1
sharding.jdbc.datasource.separate_entity_1.username=root
sharding.jdbc.datasource.separate_entity_1.password=

sharding.jdbc.datasource.actual.data.nodes.order=separate_entity_$->{0..1}.t_order_$->{0..1}
sharding.jdbc.datasource.actual.data.nodes.orderitem=separate_entity_$->{0..1}.t_order_item_$->{0..1}

``

sharding-databases.xml 配置文件:

<!-- 可能不同的業務表有不同的業務規則,會出現好多個分庫,分表策略-->
    <bean id="preciseModuloDatabaseShardingAlgorithm" class="com.sharding.demo.algorithm.DatabaseShardingAlgorithm" />
    <bean id="preciseModuloTableShardingAlgorithm" class="com.sharding.demo.algorithm.TableShardingAlgorithm" />

    <!-- 可能不同的業務表有不同的業務規則,會出現好多個分庫,分表策略,這塊指定了-->
    <sharding:standard-strategy id="databaseShardingStrategy" sharding-column="user_id" precise-algorithm-ref="preciseModuloDatabaseShardingAlgorithm" />
    <sharding:standard-strategy id="tableShardingStrategy" sharding-column="order_id" precise-algorithm-ref="preciseModuloTableShardingAlgorithm" />

    <sharding:data-source id="shardingDataSource">
        <sharding:sharding-rule data-source-names="separate_entity_0,separate_entity_1">
            <sharding:table-rules>
                <sharding:table-rule logic-table="t_order" 
                    actual-data-nodes="${sharding.jdbc.datasource.actual.data.nodes.order}"
                     database-strategy-ref="databaseShardingStrategy" table-strategy-ref="tableShardingStrategy"
                      generate-key-column-name="order_id" />

                <sharding:table-rule logic-table="t_order_item" 
                    actual-data-nodes="${sharding.jdbc.datasource.actual.data.nodes.orderitem}" 
                    database-strategy-ref="databaseShardingStrategy" 
                    table-strategy-ref="tableShardingStrategy" 
                    generate-key-column-name="order_item_id" />
            </sharding:table-rules>
        </sharding:sharding-rule>
    </sharding:data-source>

分庫分表:

public final class DatabaseShardingAlgorithm implements PreciseShardingAlgorithm<Integer> {

    @Override
    public String doSharding(final Collection<String> availableTargetNames, final PreciseShardingValue<Integer> shardingValue) {
        for (String each : availableTargetNames) {
            if (each.endsWith(shardingValue.getValue() % 2 + "")) {
                return each;
            }
        }
        throw new UnsupportedOperationException();
    }
}

public final class TableShardingAlgorithm implements PreciseShardingAlgorithm<Long> {

    @Override
    public String doSharding(final Collection<String> availableTargetNames, final PreciseShardingValue<Long> shardingValue) {
        for (String each : availableTargetNames) {
            if (each.endsWith(shardingValue.getValue() % 2 + "")) {
                return each;
            }
        }
        throw new UnsupportedOperationException();
    }
}

具體的demo在githup網址上:
demo:https://github.com/growup818/spring-learning-examples

啟動步驟:
1、需要一個tomcat
2、啟動成功後直接訪問http://ip:port/SSM/demo/test
3、訪問類是在ShardingDemoController這個類裏

Sharding-Sphere 3.X 與spring與mybatis集成(分庫分表)demo