Springboot集成ClickHouse及应用场景分析
ClickHouse应用场景:
1.绝大多数请求都是用于读访问的
2.数据需要以大批次(大于1000行)进行更新,而不是单行更新;或者根本没有更新操作
3.数据只是添加到数据库,没有必要修改
4.读取数据时,会从数据库中提取出大量的行,但只用到一小部分列
5.表很“宽”,即表中包含大量的列
6.查询频率相对较低(通常每台服务器每秒查询数百次或更少)
7.对于简单查询,允许大约50毫秒的延迟
8.列的值是比较小的数值和短字符串(例如,每个URL只有60个字节)
9.在处理单个查询时需要高吞吐量(每台服务器每秒高达数十亿行)
10.不需要事务
11.数据一致性要求较低
12.每次查询中只会查询一个大表。除了一个大表,其余都是小表
13.查询结果显著小于数据源。即数据有过滤或聚合。返回结果不超过单个服务器内存大小
行式存储对比列式存储:
(1)、行式数据
(2)、列式数据
(3)、对比分析
分析类查询,通常只需要读取表的一小部分列。在列式数据库中可以只读取需要的数据。数据总是打包成批量读取的,所以压缩是非常容易的。同时数据按列分别存储这也更容易压缩。这进一步降低了I/O的体积。由于I/O的降低,这将帮助更多的数据被系统缓存。
整合Springboot:
核心依赖(mybatis plus做持久层,druid做数据源):
<dependencies> <!--clickhouse--> <dependency> <groupId>ru.yandex.clickhouse</groupId> <artifactId>clickhouse-jdbc</artifactId> <version>0.3.1-patch</version> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.2.6</version> </dependency> <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter --> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.3.1</version> </dependency> </dependencies>
配置yml文件:
spring: datasource: type: com.alibaba.druid.pool.DruidDataSource click: driverClassName: ru.yandex.clickhouse.ClickHouseDriver url: jdbc:clickhouse://127.0.0.1:8123/dbname username: username password: 123456 initialSize: 10 maxActive: 100 minIdle: 10 maxWait: 6000 mybatis-plus: mapper-locations: classpath*:mapper/*.xml configuration: log-impl: org.apache.ibatis.logging.stdout.StdOutImpl map-underscore-to-camel-case: true cache-enabled: true lazy-loading-enabled: true multiple-result-sets-enabled: true use-generated-keys: true default-statement-timeout: 60 default-fetch-size: 100 type-aliases-package: com.example.tonghp.entity
ClickHouse与Druid连接池配置类:
参数配置:
package com.example.tonghp.config; import lombok.Data; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Component; /** * @author: tonghp * @create: 2021/07/26 16:23 */ @Data @Component @ConfigurationProperties(prefix = "spring.datasource.click") public class JdbcParamConfig { private String driverClassName ; private String url ; private Integer initialSize ; private Integer maxActive ; private Integer minIdle ; private Integer maxWait ; private String username; private String password; // 省略 GET 和 SET }
Druid连接池配置
package com.example.tonghp.config; import com.alibaba.druid.pool.DruidDataSource; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import javax.annotation.Resource; import javax.sql.DataSource; import javax.swing.*; /** * @author: tonghp * @create: 2021/07/26 16:22 */ @Configuration public class DruidConfig { @Resource private JdbcParamConfig jdbcParamConfig ; @Bean public DataSource dataSource() { DruidDataSource datasource = new DruidDataSource(); datasource.setUrl(jdbcParamConfig.getUrl()); datasource.setDriverClassName(jdbcParamConfig.getDriverClassName()); datasource.setInitialSize(jdbcParamConfig.getInitialSize()); datasource.setMinIdle(jdbcParamConfig.getMinIdle()); datasource.setMaxActive(jdbcParamConfig.getMaxActive()); datasource.setMaxWait(jdbcParamConfig.getMaxWait()); datasource.setUsername(jdbcParamConfig.getUsername()); datasource.setPassword(jdbcParamConfig.getPassword()); return datasource; } }
接下来配置实体类,mapper,service,controlle以及mapper.xml。与mybatisplus操作mysql一样的思路。
package com.example.tonghp.entity; import lombok.Data; import java.io.Serializable; /** * @author: tonghp * @create: 2021/07/26 16:31 */ @Data public class UserInfo implements Serializable { private static final long serialVersionUID = 1L; private int id; private String userName; private String passWord; private String phone; private String email; private String createDay; }
package com.example.tonghp.mapper; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.example.tonghp.entity.UserInfo; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; import org.springframework.stereotype.Repository; import java.util.List; /** * @author: tonghp * @create: 2021/07/26 16:32 */ @Repository public interface UserInfoMapper extends BaseMapper<UserInfo> { // 写入数据 void saveData (UserInfo userInfo) ; // ID 查询 UserInfo selectById (@Param("id") Integer id) ; // 查询全部 List<UserInfo> selectList () ; }
UserInfoMapper.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.example.tonghp.mapper.UserInfoMapper"> <resultMap id="BaseResultMap" type="com.example.tonghp.entity.UserInfo"> <id column="id" jdbcType="INTEGER" property="id" /> <result column="user_name" jdbcType="VARCHAR" property="userName" /> <result column="pass_word" jdbcType="VARCHAR" property="passWord" /> <result column="phone" jdbcType="VARCHAR" property="phone" /> <result column="email" jdbcType="VARCHAR" property="email" /> <result column="create_day" jdbcType="VARCHAR" property="createDay" /> </resultMap> <sql id="Base_Column_List"> id,user_name,pass_word,phone,email,create_day </sql> <insert id="saveData" parameterType="com.example.tonghp.entity.UserInfo" > INSERT INTO cs_user_info (id,user_name,pass_word,phone,email,create_day) VALUES (#{id,jdbcType=INTEGER},#{userName,jdbcType=VARCHAR},#{passWord,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR},#{email,jdbcType=VARCHAR},#{createDay,jdbcType=VARCHAR}) </insert> <select id="selectById" parameterType="java.lang.Integer" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from cs_user_info where id = #{id,jdbcType=INTEGER} </select> <select id="selectList" resultMap="BaseResultMap" > select <include refid="Base_Column_List" /> from cs_user_info </select> </mapper>
Service
package com.example.tonghp.service; import com.baomidou.mybatisplus.extension.service.IService; import com.example.tonghp.entity.UserInfo; import org.apache.ibatis.annotations.Param; import org.springframework.stereotype.Service; import java.util.List; /** * @author: tonghp * @create: 2021/07/26 16:46 */ public interface UserInfoService extends IService<UserInfo> { // 写入数据 void saveData (UserInfo userInfo) ; // ID 查询 UserInfo selectById (@Param("id") Integer id) ; // 查询全部 List<UserInfo> selectList () ; }
ServiceImpl
package com.example.tonghp.service.impl; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import com.example.tonghp.entity.UserInfo; import com.example.tonghp.mapper.UserInfoMapper; import com.example.tonghp.service.UserInfoService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * @author: tonghp * @create: 2021/07/26 16:48 */ @Service public class UserInfoServiceImpl extends ServiceImpl<UserInfoMapper, UserInfo> implements UserInfoService { @Autowired UserInfoMapper userInfoMapper; @Override public void saveData(UserInfo userInfo) { userInfoMapper.saveData(userInfo); } @Override public UserInfo selectById(Integer id) { return userInfoMapper.selectById(id); } @Override public List<UserInfo> selectList() { return userInfoMapper.selectList(); } }
Controller
package com.example.tonghp.controller; import com.example.tonghp.entity.UserInfo; import com.example.tonghp.service.UserInfoService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; import java.util.List; /** * @author: tonghp * @create: 2021/07/26 16:45 */ @RestController @RequestMapping("user") public class UserInfoController { @Autowired private UserInfoService userInfoService ; @RequestMapping("saveData") public String saveData (){ UserInfo userInfo = new UserInfo () ; userInfo.setId(4); userInfo.setUserName("winter"); userInfo.setPassWord("567"); userInfo.setPhone("13977776789"); userInfo.setEmail("winter"); userInfo.setCreateDay("2020-02-20"); userInfoService.saveData(userInfo); return "sus"; } @RequestMapping("selectById") public UserInfo selectById () { return userInfoService.selectById(1) ; } @RequestMapping("selectList") public List<UserInfo> selectList () { return userInfoService.selectList() ; } }
main()
package com.example.tonghp; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication @MapperScan("com.example.tonghp.mapper") public class TonghpApplication { public static void main(String[] args) { SpringApplication.run(TonghpApplication.class, args); } }
参考链接:
https://blog.csdn.net/weixin_46792649/article/details/115306384
https://www.cnblogs.com/ywjfx/p/14333974.html
https://www.cnblogs.com/cicada-smile/p/11632251.html
https://github.com/cicadasmile/middle-ware-parent
另外还有一种直接操作JDBC的:
https://blog.csdn.net/Alice_qixin/article/details/84957380
到此这篇关于Springboot集成ClickHouse的文章就介绍到这了,更多相关Springboot集成ClickHouse内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!
最新评论