Java猿社区—ShardingSphere-4.0.1之实现读写分离
Java猿社区—ShardingSphere-4.0.1之实现读写分离
文章目录
- Java猿社区—ShardingSphere-4.0.1之实现读写分离
- 技术体系
- 背景
- ShardingSphere介绍
- 注意事项
- ShardingShpere支持的功能
- 数据分片
- 分布式事务
- 技术准备
- mysql安装配置
- POM配置
- 读写分离——一主双从
- mysql配置环境
- sql脚本
- 配置读写分离
- application.properties
- MasterProp
- Slave0Prop
- Slave1Prop
- DataSourceConfig
- 验证
- 添加数据——写入主库
- 查询数据——从库查询
- 问题记录
参考：
基于Docker的Mysql主从复制搭建
ShardingSphere官网
技术体系
Springboot2.1.5 + shardingsphere4.0.1 + Mysql5.7 + mysql-connector-java5.1.47
背景
目前公司正在进行的在线客服IM项目，考虑未来会话消息请求流量剧增以及消息存储带来的挑战，单一数据库无法支撑，需要分库&分表、读写分离以应对高并发带来的挑战。
基于市面上较为流行的几个数据库中间件我们结合公司技术体系，再三考虑，决定使用ShardingSphere作为在线客服项目的数据库中间件。
ShardingSphere介绍
Apache ShardingSphere(Incubator) 是一套开源的分布式数据库中间件解决方案组成的生态圈，它由Sharding-JDBC、Sharding-Proxy和Sharding-Sidecar（规划中）这3款相互独立，却又能够混合部署配合使用的产品组成。它们均提供标准化的数据分片、分布式事务和数据库治理功能，可适用于如Java同构、异构语言、云原生等各种多样化的应用场景。（来自官网）
注意事项
从ShardingSphere推出4.0.0-RC2版本之后，通过属性文件application.properties配置集成是会有问题的：
- springboot2.1.5 + mysql-connector-java5.x + shardingsphere-4.0.0-RC1 + mybatis-spring-boot-starter2.0.1版本后功能正常
- springboot2.1.5 + mysql-connector-java5.x + shardingsphere-4.0.0-RC2或3或4.0.1 + mybatis-spring-boot-starter2.0.1的时候，第一先报错required a bean of type ‘com.zzx.sharding.mapper.TeamMessageMapper’ that could not be found.，然后再启动类上添加@MapperScan注解后，报错Caused by: java.lang.IllegalArgumentException: Property ‘sqlSessionFactory’ or ‘sqlSessionTemplate’ are required
这是shardsphere4.0.0-RC2发布之后的一个bug，具体是数据源没有成功注入。
下面通过手动注入数据源的方式解决此问题。
ShardingShpere支持的功能
数据分片
- 分库、分表
- 读写分离
- 分片策略定制化
- 无中心化分布式主键
分布式事务
- 标准化事务接口
- XA强一致事务
- 柔性事务
技术准备
mysql安装配置
具体安装配置请参见网络博客：如基于Docker的Mysql主从复制搭建
POM配置
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.zzx.shardingspheregroupId>
<artifactId>zzx-shardingsphereartifactId>
<packaging>pompackaging>
<version>1.0-SNAPSHOTversion>
<modules>
<module>db-read-writemodule>
<module>db-table-read-writemodule>
modules>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.1.5.RELEASEversion>
<relativePath/>
parent>
<properties>
<java.version>1.8java.version>
<mybatis-spring-boot>2.0.1mybatis-spring-boot>
<druid>1.1.16druid>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<shardingsphere.version>4.0.1shardingsphere.version>
<fastjson.version>1.2.38fastjson.version>
<mysql-connector-java.version>5.1.47mysql-connector-java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>${mybatis-spring-boot}version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>${mysql-connector-java.version}version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>${druid}version>
dependency>
<dependency>
<groupId>org.apache.shardingspheregroupId>
<artifactId>sharding-jdbc-spring-boot-starterartifactId>
<version>${shardingsphere.version}version>
dependency>
<dependency>
<groupId>org.apache.shardingspheregroupId>
<artifactId>sharding-jdbc-spring-namespaceartifactId>
<version>${shardingsphere.version}version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>${fastjson.version}version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
读写分离——一主双从
mysql配置环境
主库： localhost:3339/im_bis
从库0: localhost:3340/im_bis
从库1: localhost:3341/im_bis
配置从库0和从库1作为主库的从库，具体配置参考上面提到的基于Docker搭建主从复制网站
sql脚本
DROP SCHEMA IF EXISTS im_bis;
CREATE SCHEMA IF NOT EXISTS im_bis;
use im_bis;
/*
Navicat Premium Data Transfer
Source Server : 192.168.89.53
Source Server Type : MySQL
Source Server Version : 50726
Source Host : 192.168.89.53:3306
Source Schema : ddky_im_bis
Target Server Type : MySQL
Target Server Version : 50726
File Encoding : 65001
Date: 08/03/2020 13:18:39
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for im_team_message
-- ----------------------------
DROP TABLE IF EXISTS `im_team_message`;
CREATE TABLE `im_team_message` (
`id` bigint(20) NOT NULL COMMENT '主键id',
`team_msg_id` bigint(20) DEFAULT NULL COMMENT '群消息id(服务端生成消息id)',
`team_client_msg_id` varchar(32) DEFAULT '' COMMENT '群消息id（客户端生成）',
`team_id` varchar(32) DEFAULT '' COMMENT '群组id（对应群组的accid）',
`msg_type` varchar(15) DEFAULT 'TEXT' COMMENT '消息类型：TEXT-文本，PICTURE-图片，AUDIO-音频，VIDEO-视频，FILE-文件，GEO-地理位置，CUSTOM-自定义，TIP-提醒，ROBOT-AI机器人，NOTICATION-群通知，TEAM_INVITE-邀请入群，TEAM_INVITE_REJECT-拒绝邀请，CUSTOM_TEAM_MSG -群组自定义系统通知',
`event_type` tinyint(4) DEFAULT '1' COMMENT '事件类型：1-会话类型消息（p2p消息、群聊消息、自定义系统通知、云信内置系统通知），2-登录事件，3-登出/离线事件，4-聊天室聊天消息，5-音视频时长、白板时长消息，6-音视频白板大小、下载地址消息，7-单聊消息撤回，8-群聊消息撤回，9-汇报主播、管理员进出聊天室事件消息，10-汇报专线电话通话结束回调抄送的消息，11-汇报短信回执抄送的消息，12-汇报短信上行消息，13-汇报用户进出音视频/白板房间的消息，14-汇报聊天室队列操作的事件消息，20-易盾异步反垃圾结果信息',
`remind_type` tinyint(4) DEFAULT '0' COMMENT '提醒类型：0-普通消息，1-客服进入，2-客户进入，3-客服进入欢迎提醒，4-敏感词命中提醒消息',
`conv_type` varchar(20) DEFAULT '' COMMENT '场景类型：TEAM',
`scene` tinyint(4) DEFAULT '0' COMMENT '场景：0-team，1-p2p，2-superTeam',
`text` varchar(5000) DEFAULT '' COMMENT '内容',
`attach` varchar(5000) DEFAULT '' COMMENT '附加消息',
`team_attach_type` tinyint(4) DEFAULT NULL COMMENT '群通知类型：默认null（普通消息），0-更新群，1-拉人入群，2-踢人出群，3-接受入群邀请，4-通过入群邀请，5-添加群管理员，6-移除群管理员，7-主动退群，8-解散群，9-转让群，10-更新群成员禁言状态',
`send_type` tinyint(4) DEFAULT '0' COMMENT '发送人类型：0-用户，1-客服，2-药师，3-医生',
`send_client_ip` varchar(20) DEFAULT '' COMMENT '发送端ip',
`send_client_port` varchar(5) DEFAULT '' COMMENT '发送端端口',
`send_client_type` varchar(10) DEFAULT '' COMMENT '发送客户端类型： AOS、IOS、PC、WINPHONE、WEB、REST',
`send_device_id` varchar(32) DEFAULT '' COMMENT '发送端设备编号',
`send_nick` varchar(50) DEFAULT '' COMMENT '发送人昵称',
`send_id` varchar(32) DEFAULT '' COMMENT '发送人id（对应客服表和用户表的accid）',
`send_at` bigint(11) DEFAULT NULL COMMENT '发送时间',
`msg_receipt_time` bigint(11) DEFAULT NULL COMMENT '已读回执时间戳，如果有此字段, 说明此时间戳之前的所有消息对方均已读',
`is_revoke` tinyint(4) DEFAULT '0' COMMENT '是否撤销：0-否，1-是',
`revoke_at` bigint(11) DEFAULT '0' COMMENT '撤销时间',
`custom_apns_text` varchar(200) DEFAULT '' COMMENT '自定义系统通知消息推送文本。仅在convType为CUSTOM_PERSON或CUSTOM_TEAM时含此字段',
`ext` varchar(64) DEFAULT '' COMMENT '消息扩展字段',
`antispam` varchar(12) DEFAULT '' COMMENT '标识是否被反垃圾(‘’，true，false)',
`yidun_res` varchar(500) DEFAULT '' COMMENT '易盾反垃圾的原始处理细节',
`msg_status` tinyint(4) DEFAULT '0' COMMENT '消息发送状态：0-发送成功，1-发送中，2-发送失败',
`status` tinyint(4) DEFAULT '0' COMMENT '状态：有效 0：无效',
PRIMARY KEY (`id`),
UNIQUE KEY `index_tt` (`id`,`team_msg_id`,`team_client_msg_id`) USING BTREE,
KEY `index_team_id_on_im_team_message` (`team_id`),
KEY `index_send_at_on_im_team_message` (`send_at`)
) ENGINE=InnoDB AUTO_INCREMENT=2104820 DEFAULT CHARSET=utf8mb4 COMMENT='IM消息表';
SET FOREIGN_KEY_CHECKS = 1;
配置读写分离
application.properties
server.port=8888
spring.main.allow-bean-definition-overriding=true
# ---------------------------------
# mybatis
# ---------------------------------
mybatis.type-aliases-package=com.zzx.sharding.entity
#mybatis.type-handlers-package=com.example.typehandler
mybatis.configuration.map-underscore-to-camel-case=true
mybatis.configuration.default-fetch-size=100
mybatis.configuration.default-statement-timeout=3000
mybatis.mapper-locations=classpath*:mapper/*.xml
# --------------------------------
# druid
# ---------------------------------
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.druid.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.druid.filters=stat,wall,log4j2
spring.datasource.druid.max-active=50
spring.datasource.druid.initial-size=2
spring.datasource.druid.max-wait=60000
spring.datasource.druid.min-idle=2
spring.datasource.druid.keep-alive=true
spring.datasource.druid.time-between-eviction-runs-millis=60000
spring.datasource.druid.min-evictable-idle-time-millis=300000
spring.datasource.druid.validation-query=select 'x'
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-on-return=false
spring.datasource.druid.pool-prepared-statements=true
spring.datasource.druid.max-open-prepared-statements=20
spring.datasource.druid.connection-properties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000;
spring.datasource.druid.use-global-data-source-stat=true
spring.datasource.druid.web-stat-filter.enabled=true
spring.datasource.druid.web-stat-filter.url-pattern=/*
spring.datasource.druid.web-stat-filter.exclusions='*.gif,*.png,*.jpg,*.html,*.js,*.css,*.ico,/druid/*'
spring.datasource.druid.stat-view-servlet.enabled=true
spring.datasource.druid.stat-view-servlet.url-pattern=/druid/*
spring.datasource.druid.stat-view-servlet.reset-enable=true
spring.datasource.druid.stat-view-servlet.login-username=admin
spring.datasource.druid.stat-view-servlet.login-password=admin
# 配置日志输出
spring.datasource.druid.filter.log4j2.enabled=true
spring.datasource.druid.filter.log4j2.statement-create-after-log-enabled=false
spring.datasource.druid.filter.log4j2.statement-close-after-log-enabled=false
spring.datasource.druid.filter.log4j2.result-set-open-after-log-enabled=false
spring.datasource.druid.filter.log4j2.result-set-close-after-log-enabled=false
# --------------------------------
# ShardingSphere
# ---------------------------------
spring.shardingsphere.datasource.names=master,slave0,slave1
# 数据源 主库
spring.shardingsphere.datasource.master.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.master.driver-class-name=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.master.url=jdbc:mysql://localhost:3339/im_bis?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true
spring.shardingsphere.datasource.master.username=root
spring.shardingsphere.datasource.master.password=123456
# 数据源 从库
spring.shardingsphere.datasource.slave0.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.slave0.driver-class-name=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.slave0.url=jdbc:mysql://localhost:3340/im_bis?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true
spring.shardingsphere.datasource.slave0.username=root
spring.shardingsphere.datasource.slave0.password=123456
# 数据源 从库
spring.shardingsphere.datasource.slave1.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.slave1.driver-class-name=com.mysql.jdbc.Driver
spring.shardingsphere.datasource.slave1.url=jdbc:mysql://localhost:3341/im_bis?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true
spring.shardingsphere.datasource.slave1.username=root
spring.shardingsphere.datasource.slave1.password=123456
MasterProp
package com.zzx.sharding.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
/**
* @author zhouzhixiang
* @company 叮当快药科技集团有限公司
* @Date 2020-03-15
*/
@ConfigurationProperties(prefix = "spring.shardingsphere.datasource.master")
@Data
public class MasterProp {
private String url;
private String username;
private String password;
private String type;
private String driverClassName;
}
Slave0Prop
package com.zzx.sharding.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
/**
* @author zhouzhixiang
* @company 叮当快药科技集团有限公司
* @Date 2020-03-15
*/
@ConfigurationProperties(prefix = "spring.shardingsphere.datasource.slave0")
@Data
public class Slave0Prop {
private String url;
private String username;
private String password;
private String type;
private String driverClassName;
}
Slave1Prop
package com.zzx.sharding.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
/**
* @author zhouzhixiang
* @company 叮当快药科技集团有限公司
* @Date 2020-03-15
*/
@ConfigurationProperties(prefix = "spring.shardingsphere.datasource.slave1")
@Data
public class Slave1Prop {
private String url;
private String username;
private String password;
private String type;
private String driverClassName;
}
DataSourceConfig
package com.zzx.sharding.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.zzx.sharding.utils.DataSourceUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.shardingsphere.api.config.masterslave.LoadBalanceStrategyConfiguration;
import org.apache.shardingsphere.api.config.masterslave.MasterSlaveRuleConfiguration;
import org.apache.shardingsphere.api.config.sharding.KeyGeneratorConfiguration;
import org.apache.shardingsphere.api.config.sharding.ShardingRuleConfiguration;
import org.apache.shardingsphere.api.config.sharding.TableRuleConfiguration;
import org.apache.shardingsphere.shardingjdbc.api.ShardingDataSourceFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.*;
/**
* @author zhouzhixiang
*/
@Configuration
@EnableTransactionManagement(proxyTargetClass = true)
@EnableConfigurationProperties({MasterProp.class, Slave0Prop.class, Slave1Prop.class})
@Slf4j
@MapperScan(basePackages = "com.zzx.sharding.mapper", sqlSessionTemplateRef = "sqlSessionTemplate")
public class DataSourceConfig {
/**
* 配置数据源0，数据源的名称最好要有一定的规则，方便配置分库的计算规则
*
* @return
*/
@Bean(name = "master")
public DataSource master(MasterProp masterProp) {
Map<String, Object> dsMap = new HashMap<>();
dsMap.put("type", masterProp.getType());
dsMap.put("url", masterProp.getUrl());
dsMap.put("username", masterProp.getUsername());
dsMap.put("password", masterProp.getPassword());
dsMap.put("driverClassName", masterProp.getDriverClassName());
DruidDataSource ds = (DruidDataSource) DataSourceUtil.buildDataSource(dsMap);
// 每个分区最大的连接数
ds.setMaxActive(20);
// 每个分区最小的连接数
ds.setMinIdle(5);
return ds;
}
/**
* 配置数据源0，数据源的名称最好要有一定的规则，方便配置分库的计算规则
*
* @return
*/
@Bean(name = "slave0")
public DataSource slave0(Slave0Prop slave0Prop) {
Map<String, Object> dsMap = new HashMap<>();
dsMap.put("type", slave0Prop.getType());
dsMap.put("url", slave0Prop.getUrl());
dsMap.put("username", slave0Prop.getUsername());
dsMap.put("password", slave0Prop.getPassword());
dsMap.put("driverClassName", slave0Prop.getDriverClassName());
DruidDataSource ds = (DruidDataSource) DataSourceUtil.buildDataSource(dsMap);
// 每个分区最大的连接数
ds.setMaxActive(20);
// 每个分区最小的连接数
ds.setMinIdle(5);
return ds;
}
/**
* 配置数据源0，数据源的名称最好要有一定的规则，方便配置分库的计算规则
*
* @return
*/
@Bean(name = "slave1")
public DataSource slave1(Slave1Prop slave1Prop) {
Map<String, Object> dsMap = new HashMap<>();
dsMap.put("type", slave1Prop.getType());
dsMap.put("url", slave1Prop.getUrl());
dsMap.put("username", slave1Prop.getUsername());
dsMap.put("password", slave1Prop.getPassword());
dsMap.put("driverClassName", slave1Prop.getDriverClassName());
DruidDataSource ds = (DruidDataSource) DataSourceUtil.buildDataSource(dsMap);
// 每个分区最大的连接数
ds.setMaxActive(20);
// 每个分区最小的连接数
ds.setMinIdle(5);
return ds;
}
@Bean("dataSource")
public DataSource dataSource(@Qualifier("master") DataSource master, @Qualifier("slave0") DataSource slave0, @Qualifier("slave1") DataSource slave1) throws SQLException {
// 配置真实数据源
Map<String, DataSource> dataSourceMap = new HashMap<>();
dataSourceMap.put("master", master);
dataSourceMap.put("slave0", slave0);
dataSourceMap.put("slave1", slave1);
List<String> slaveList = new ArrayList<>();
slaveList.add("slave0");
slaveList.add("slave1");
// 从库负载策略
LoadBalanceStrategyConfiguration loadBalanceStrategyConfiguration = new LoadBalanceStrategyConfiguration("round_robin");
MasterSlaveRuleConfiguration masterSlaveRuleConfiguration = new MasterSlaveRuleConfiguration("ms", "master", slaveList, loadBalanceStrategyConfiguration);
// 打开shardingsphere sql日志
Properties properties = new Properties();
properties.setProperty("sql.show", Boolean.TRUE.toString());
// 配置分片规则
ShardingRuleConfiguration shardingRuleConfig = new ShardingRuleConfiguration();
//TableRuleConfiguration orderTableRuleConfig = new TableRuleConfiguration("t_order", "ds${0..1}.t_order_${0..1}");
// 配置分库 + 分表策略
//orderTableRuleConfig.setDatabaseShardingStrategyConfig(new InlineShardingStrategyConfiguration("user_id", "ds${user_id % 2}"));
//orderTableRuleConfig.setTableShardingStrategyConfig(new InlineShardingStrategyConfiguration("order_id", "t_order_${order_id % 2}"));
//shardingRuleConfig.getTableRuleConfigs().add(orderTableRuleConfig);
shardingRuleConfig.getMasterSlaveRuleConfigs().add(masterSlaveRuleConfiguration);
shardingRuleConfig.getTableRuleConfigs().add(getImTeamMessageRuleConfiguration());
// 获取数据源对象
DataSource dataSource = ShardingDataSourceFactory.createDataSource(dataSourceMap, shardingRuleConfig, properties);
return dataSource;
}
/** 消息表——im_team_message */
TableRuleConfiguration getImTeamMessageRuleConfiguration() {
TableRuleConfiguration result = new TableRuleConfiguration("im_team_message");
result.setKeyGeneratorConfig(getImTeamMessageKeyGeneratorConfiguration());
return result;
}
private static KeyGeneratorConfiguration getImTeamMessageKeyGeneratorConfiguration() {
KeyGeneratorConfiguration result = new KeyGeneratorConfiguration("SNOWFLAKE", "id");
return result;
}
/** 消息表——im_team_message */
@Bean
public DataSourceTransactionManager shardTransactionManager(@Qualifier("dataSource") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
@Bean("sqlSessionFactory")
@Primary
public SqlSessionFactory sqlSessionFactory(@Qualifier("dataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/*.xml"));
return bean.getObject();
}
@Bean("sqlSessionTemplate")
@Primary
public SqlSessionTemplate sqlSessionTemplate(@Qualifier("sqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
验证
添加数据——写入主库
postman执行： localhost:8888/teamMessage/batchAdd
代码
@PostMapping("batchAdd")
public ServiceResponse batchAdd(HttpServletRequest request, HttpServletResponse response) throws IOException {
ServiceResponse result = new ServiceResponse<>();
for (int i = 0; i < 20; i++) {
TeamMessage vo = new TeamMessage();
vo.setSendAt(new Date().getTime());
vo.setTeamId(1000);
vo.setTeamClientMsgId(UUID.randomUUID().toString());
vo.setTeamMsgId(SnowIdUtils.uniqueLong());
vo.setId(SnowIdUtils.uniqueLong());
vo.setText("消息内容-"+UUID.randomUUID());
this.teamMessageServiceApi.insert(vo);
}
result.setCode(ResponseEnum.SUCCESS.getCode());
result.setMsg(ResponseEnum.SUCCESS.getName());
return result;
}
shardingsphere日志
2020-03-11 11:19:24.865 INFO 39211 --- [nio-8888-exec-2] ShardingSphere-SQL : Rule Type: master-slave
2020-03-11 11:19:24.865 INFO 39211 --- [nio-8888-exec-2] ShardingSphere-SQL : SQL: INSERT IGNORE INTO
INSERT IGNORE INTO im_team_message ( id, team_msg_id, team_client_msg_id, remind_type, scene, text, team_attach_type, send_type, team_id, send_at, is_revoke, msg_status, STATUS )
VALUES
( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? ) ::: DataSources: master
写入主库成功
查询数据——从库查询
查询所有数据
从库负载均衡算法类型为轮询
控制台sql日志(从从库0查询数据)：
SELECT
id,
team_msg_id,
team_client_msg_id,
msg_type,
remind_type,
conv_type,
scene,
text,
team_attach_type,
send_type,
send_client_ip,
send_client_port,
send_client_type,
send_device_id,
send_nick,
team_id,
send_id,
send_at,
msg_receipt_time,
is_revoke,
revoke_at,
msg_status,
event_type,
STATUS,
attach,
custom_apns_text,
ext,
antispam,
yidun_res
FROM
im_team_message
WHERE
STATUS = 0
::: DataSources: slave0
控制台sql日志(从从库1查询数据)：
SELECT
id,
team_msg_id,
team_client_msg_id,
msg_type,
remind_type,
conv_type,
scene,
text,
team_attach_type,
send_type,
send_client_ip,
send_client_port,
send_client_type,
send_device_id,
send_nick,
team_id,
send_id,
send_at,
msg_receipt_time,
is_revoke,
revoke_at,
msg_status,
event_type,
STATUS,
attach,
custom_apns_text,
ext,
antispam,
yidun_res
FROM
im_team_message
WHERE
STATUS = 0
::: DataSources: slave1
成功！
问题记录
springboot2.1.5默认使用mysql-connECTOR-java8.x的版本，这个版本的驱动使用shardingsphere时会有bug，推荐使用mysql-connector-java5.1.47版本
