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Spring Boot with multiple datasources Oracle and H2

由 旧街凉风 提交于 2019-12-05 22:39:53

I have meet the same question like you, but in h2 and mysql.I am not use h2 and oracle at same time, in this post, maybe you can find some useful.

Here is my double datasource config:

maven dependency:

<!-- stater mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <!-- jdbc --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency>

```

datasource:
  km:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/km?useUnicode=true&characterEncoding=UTF-8&useSSL=false
    username: root
    password: 123456
    max-active: 100
    max-idle: 10
    max-wait: 10000
    test-while-idle: true
  esb:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/esb?useUnicode=true&characterEncoding=UTF-8&useSSL=false
    username: root
    password: 123456
    max-active: 100
    max-idle: 10
    max-wait: 10000
    test-while-idle: true

```

Datasource km config class: ```

import com.package.km.api.commons.config.datasource.annotation.UseDatasourceKM;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.ClassPathResource;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;
import java.lang.invoke.MethodHandles;
import java.sql.SQLException;

/**
 * km datasource config
 * Created by BeeNoisy on 16/5/23.
 */
@Configuration
@MapperScan(basePackages = "package.km", annotationClass = UseDatasourceKM.class, sqlSessionFactoryRef = KMDatasourceConfig.SQL_SESSION_FACTORY_NAME)
public class KMDatasourceConfig {
    public static final String SQL_SESSION_FACTORY_NAME = "sessionFactoryKm";
    public static final String TX_MANAGER = "txManagerKm";
    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

    @Bean(name = "datasourceKm")
    @Primary
    @ConfigurationProperties(prefix = "datasource.km")
    public DataSource dataSourceKm() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = TX_MANAGER)
    @Primary
    public PlatformTransactionManager txManagerKm() {
        return new DataSourceTransactionManager(dataSourceKm());
    }

    @Bean(name = KMDatasourceConfig.SQL_SESSION_FACTORY_NAME)
    @Primary
    public SqlSessionFactory sqlSessionFactoryBean() throws Exception {

        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setConfigLocation(new ClassPathResource("/mybatis/mybatis-conf.xml"));
        sqlSessionFactoryBean.setDataSource(dataSourceKm());
        return sqlSessionFactoryBean.getObject();
    }
}

```

Here is datasource esb config class:

```

import com.package.km.api.commons.condition.EsbEnabledCondition;
import com.package.km.api.commons.config.datasource.annotation.UseDatasourceESB;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Conditional;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;
import java.lang.invoke.MethodHandles;

/**
 * Created by BeeNoisy on 16/5/23.
 */
@Configuration
@Conditional(EsbEnabledCondition.class)
@MapperScan(basePackages = "package.esb", annotationClass = UseDatasourceESB.class, sqlSessionFactoryRef = EsbDatasourceConfig.SQL_SESSION_FACTORY_NAME)
public class EsbDatasourceConfig {
    public static final String SQL_SESSION_FACTORY_NAME = "sessionFactoryEsb";
    public static final String TX_MANAGER = "txManagerEsb";
    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

    @Bean(name = "datasourceEsb")
    @Conditional(EsbEnabledCondition.class)
    @ConfigurationProperties(prefix = "datasource.esb")
    public DataSource dataSourceEsb() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = TX_MANAGER)
    @Conditional(EsbEnabledCondition.class)
    public PlatformTransactionManager txManagerEsb() {
        return new DataSourceTransactionManager(dataSourceEsb());
    }

    @Bean(name = EsbDatasourceConfig.SQL_SESSION_FACTORY_NAME)
    @Conditional(EsbEnabledCondition.class)
    public SqlSessionFactory sqlSessionFactoryBean() throws Exception {

        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setConfigLocation(new ClassPathResource("/mybatis/mybatis-conf.xml"));
        sqlSessionFactoryBean.setDataSource(dataSourceEsb());
        return sqlSessionFactoryBean.getObject();
    }
}

```

Then you can use the two annotation: UseDatasourceESB or UseDatasourceKM to annotate your mapper class like:

```

@UseDatasourceKM
public interface GroupBaseDAO {
    public static final String COL_ALL = " id, name, create_time, last_update_time "; 
    public static final String TABLE = " group_base "; 

    @Select(" select " + COL_ALL + " from " + TABLE + " where id = #{id} ")
    public GroupBase findById(@Param("id") int id);

    @Select(" select " +
            COL_ALL +
            " from " +
            TABLE +
            " where id < #{lastId} " +
            " limit #{count} ")
    public List<GroupBase> list(
            @Param("lastId") int lastId,
            @Param("count") int count
    );
...

```

There is two datasource in mysql\h2 and oracle. y the way, you can run your code in debug model, and step into getConnection() method to find more details.

标签
java
database
spring-boot
database-connection
datasource
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