1、多数据源配置之Transactional注解不同的事务管理器控制
程序员文章站
2022-05-07 16:21:33
...
前言
1、一定注意是maven项目,在添加mybatis的Resource中扫描classpath的过程中可能会报错,所以需要加入
2、这里和我后面一章介绍的差不多,但是需要在使用中注意的是,我们的实体类,尽量不要放到一起,尽管可以使用。
1、因为加入我们的实体类放到一起。很容易混淆不同数据库的表
2、如果是springBoot关于hibernate自动生成表则可能在每个数据源扫描的时候自动帮我们添加表,则会形成两个库中的表一样,但是却有些重复不使用。
<resources>
<resource>
<directory>src/main/i18n</directory>
</resource>
<resource>
<directory>src/main/resources</directory>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
1、配置信息中写入多种数据源的配置连接信息
########################################################
### jpa
########################################################
spring.jpa.database=MYSQL
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto =update
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
#datasource admore
admore.datasource.url=jdbc:mysql://localhost:3306/com_hlj_many_database-one
admore.datasource.username=root
admore.datasource.password=123456
admore.datasource.driver-class-name=com.mysql.jdbc.Driver
#datasource admore-data
admore.data.datasource.url=jdbc:mysql://localhost:3306/com_hlj_many_database-two
admore.data.datasource.username=root
admore.data.datasource.password=123456
admore.data.datasource.driver-class-name=com.mysql.jdbc.Driver
2、启用事物注解
package com.hlj.many.datasourse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@SpringBootApplication
@EnableTransactionManagement
public class ComHljManyDatasourceApplication {
public static void main(String[] args) {
SpringApplication.run(ComHljManyDatasourceApplication.class, args);
}
}
2、配置默认的数据源(通过注解@primary)
1、配置JPa扫描的路径和mybatis扫描的路径
package com.hlj.many.datasourse.dataresource;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.ibatis.session.SqlSessionFactory;
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.beans.factory.annotation.Value;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.Resource;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
/**
* 类描述:
* 创建人: j.sh
* 创建时间: 2016/9/10
* version:1.0.0
*/
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
entityManagerFactoryRef="admoreEMF",
transactionManagerRef="admoreTM",
basePackages= { "com.hlj.many.datasourse.dataresource.dao.data" })
@MapperScan(basePackages = {"com.hlj.many.datasourse.dataresource.dao.data"}, sqlSessionTemplateRef = "admoreSessionTemplate")
public class DatasourceOneData {
@Value("${admore.datasource.url}")
private String admoreUrl;
@Value("${admore.datasource.username}")
private String admoreUsername;
@Value("${admore.datasource.password}")
private String admorePassword;
@Primary
@Bean(name = "admore")
public DataSource primaryDataSource() {
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setUrl(admoreUrl);
druidDataSource.setUsername(admoreUsername);
druidDataSource.setPassword(admorePassword);
druidDataSource.setMaxActive(150);
druidDataSource.setInitialSize(10);
druidDataSource.setTestWhileIdle(true);
druidDataSource.setMaxWait(3000);
druidDataSource.setTimeBetweenEvictionRunsMillis(60000);
druidDataSource.setMinEvictableIdleTimeMillis(300000);
return druidDataSource;
}
@Primary
@Bean(name = "admoreEMF")
public LocalContainerEntityManagerFactoryBean admoreEMF(EntityManagerFactoryBuilder builder, @Qualifier("admore") DataSource dataSource) {
return builder
.dataSource(dataSource)
.packages("com.hlj.many.datasourse.dataresource.dao.data.entry")
.persistenceUnit("admore")
.build();
}
@Primary
@Bean(name = "admoreTM")
public PlatformTransactionManager admoreTransactionManager(@Qualifier("admoreEMF") LocalContainerEntityManagerFactoryBean entityManagerFactoryBean ) {
return new JpaTransactionManager(entityManagerFactoryBean.getObject());
}
@Primary
@Bean(name = "admoreSessionFactory")
public SqlSessionFactory admoreSessionFactory(@Qualifier("admore")DataSource dataSource, ApplicationContext applicationContext) throws Exception {
SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource);
sessionFactoryBean.setConfigLocation(applicationContext.getResource("classpath:mybatis.xml"));
Resource[] resources = ArrayUtils.addAll(
applicationContext.getResources("classpath*:com/hlj/many/datasourse/dataresource/dao/data/mysql/*.xml")
// ,applicationContext.getResources("classpath*:com/duodian/admore/dao/db/**/mysql/*.xml")
);
sessionFactoryBean.setMapperLocations(resources);
return sessionFactoryBean.getObject();
}
@Primary
@Bean(name = "admoreSessionTemplate")
public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("admoreSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
4、其他数据源
package com.hlj.many.datasourse.dataresource;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.ibatis.session.SqlSessionFactory;
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.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.Resource;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
/**
* 类描述:
* 创建人: j.sh
* 创建时间: 2016/9/10
* version:1.0.0
*/
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
entityManagerFactoryRef="admoreDataEMF",
transactionManagerRef="admoreDataTM",
basePackages= { "com.hlj.many.datasourse.dataresource.dao.db" })
@MapperScan(basePackages = {"com.hlj.many.datasourse.dataresource.dao.db"}, sqlSessionTemplateRef = "admoreDataSessionTemplate")
//@MapperScan(basePackages = {"com.hlj.many.datasourse.dataresource.dao.db","com.hlj.many.datasourse.dataresource.dao.data.mydata"}, sqlSessionTemplateRef = "admoreSessionTemplate")
public class DatasourceTwoDb {
@Value("${admore.data.datasource.url}")
private String admoreDataUrl;
@Value("${admore.data.datasource.username}")
private String admoreDataUsername;
@Value("${admore.data.datasource.password}")
private String admoreDataPassword;
@Bean(name = "admoreData")
public DataSource primaryDataSource() {
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setUrl(admoreDataUrl);
druidDataSource.setUsername(admoreDataUsername);
druidDataSource.setPassword(admoreDataPassword);
druidDataSource.setMaxActive(150);
druidDataSource.setInitialSize(10);
druidDataSource.setTestWhileIdle(true);
druidDataSource.setMaxWait(3000);
druidDataSource.setTimeBetweenEvictionRunsMillis(60000);
druidDataSource.setMinEvictableIdleTimeMillis(300000);
return druidDataSource;
}
@Bean(name = "admoreDataEMF")
public LocalContainerEntityManagerFactoryBean admoreDataEMF(EntityManagerFactoryBuilder builder, @Qualifier("admoreData") DataSource dataSource) {
return builder
.dataSource(dataSource)
.packages("com.hlj.many.datasourse.dataresource.dao.db.entry")
.persistenceUnit("admoreData")
.build();
}
@Bean(name = "admoreDataTM")
public PlatformTransactionManager admoreTransactionManager(@Qualifier("admoreDataEMF") LocalContainerEntityManagerFactoryBean entityManagerFactoryBean ) {
return new JpaTransactionManager(entityManagerFactoryBean.getObject());
}
@Bean(name = "admoreDataSessionFactory")
public SqlSessionFactory admoreDataSessionFactory(@Qualifier("admoreData") DataSource dataSource, ApplicationContext applicationContext) throws Exception {
SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource);
sessionFactoryBean.setConfigLocation(applicationContext.getResource("classpath:mybatis.xml"));
Resource[] resources = ArrayUtils.addAll(
applicationContext.getResources("classpath*:com/hlj/many/datasourse/dataresource/dao/db/mysql/*.xml")
// applicationContext.getResources("classpath*:com/duodian/admore/dao/mydata/**/mysql/*.xml")
);
sessionFactoryBean.setMapperLocations(resources);
return sessionFactoryBean.getObject();
}
@Bean(name = "admoreDataSessionTemplate")
public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("admoreDataSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
5、多数据源直接的使用
5.1、默认的数据源
package com.hlj.many.datasourse.dataresource.service;
import com.hlj.many.datasourse.dataresource.dao.data.PersonOneDao;
import com.hlj.many.datasourse.dataresource.dao.data.entry.PersonOne;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
/**
* @Description
* @Author HealerJean
* @Date 2018/4/19 下午1:58.
*/
@Service
public class MainService {
@Resource
private PersonOneDao personOneDao;
/**
* 默认选择第一种数据源
* @param personOne
* @return
*/
public PersonOne save(PersonOne personOne){
return personOneDao.save(personOne);
}
}
5.2、指定第一种数据源
package com.hlj.many.datasourse.dataresource.service;
import com.hlj.many.datasourse.dataresource.dao.data.PersonOneDao;
import com.hlj.many.datasourse.dataresource.dao.data.PersonOneMapper;
import com.hlj.many.datasourse.dataresource.dao.data.entry.PersonOne;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource;
/**
* @Description
* @Author HealerJean
* @Date 2018/4/19 下午1:58.
*/
@Service
@Transactional(rollbackFor = Exception.class,transactionManager = "admoreTM")
public class OneService {
@Resource
private PersonOneDao personOneDao;
@Resource
private PersonOneMapper personOneMapper;
public PersonOne save(PersonOne personOne){
return personOneDao.save(personOne);
}
public PersonOne findById(Long id){
return personOneMapper.findById(id);
}
}
5.3、指定第二种数据源
package com.hlj.many.datasourse.dataresource.service;
import com.hlj.many.datasourse.dataresource.dao.db.PersonTwoDao;
import com.hlj.many.datasourse.dataresource.dao.db.PersonTwoMapper;
import com.hlj.many.datasourse.dataresource.dao.db.entry.PersonTwo;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource;
import java.util.List;
/**
* @Description
* @Author HealerJean
* @Date 2018/4/19 下午1:58.
*/
@Service
@Transactional(rollbackFor = Exception.class,transactionManager = "admoreDataTM")
public class TwoService {
@Resource
private PersonTwoDao personTwoDao;
@Resource
private PersonTwoMapper personTwoMapper;
public PersonTwo save(PersonTwo personTwo){
return personTwoDao.save(personTwo);
}
public PersonTwo findById(Long id){
return personTwoMapper.findById(id);
}
public List<PersonTwo> findALL(){
return personTwoMapper.findALL();
}
}
6、项目结构
7、代码下载
如果满意,请打赏博主任意金额,感兴趣的请下方留言吧。可与博主*讨论哦
支付包 | 微信 | 微信公众号 |
---|---|---|
上一篇: 牛鞭真的能补肾壮阳吗,答案您一定想不到