Multi data source configuration code

@Configuration
public class ImpalaDataSourceConfig {

    @Value("${impala.drive_class_name}")
    private String driverClassName;

   @Value("${impala.jdbc_url}")
    private String jdbcUrl;

    @Value("${impala.mapper-locations}")
    private String locations;

    @Bean(name = "impalaDataSource")
    @Qualifier(value = "impalaDataSource")
    public DataSource primaryDataSource() {
        HikariConfig config = new HikariConfig();
        config.setDriverClassName(driverClassName);
        config.setJdbcUrl(jdbcUrl);
        HikariDataSource dataSource = new HikariDataSource(config);
        return dataSource;
    }

    @Bean(name = "impalaSqlSessionFactory")
    public SqlSessionFactory impalaSqlSessionFactory(@Qualifier("impalaDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        // Create one here Configuration  Be careful not to mislead the bag 
        org.apache.ibatis.session.Configuration configuration=new org.apache.ibatis.session.Configuration();
        // Configure log implementation 
        configuration.setLogImpl(StdOutImpl.class);
        // You can add others here mybatis To configure   For example, hump naming 
        configuration.setMapUnderscoreToCamelCase(true);
        //bena The factory loads the above configured Configuration
        bean.setConfiguration(configuration);
        // Set up mapper The configuration file 
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(locations));
        return bean.getObject();
    }


    /** establish SqlSessionTemplate*/
    @Bean(name = "impalaSqlSessionTemplate")
    public SqlSessionTemplate impalaSqlSessionTemplate(@Qualifier("impalaSqlSessionFactory") SqlSessionFactory sqlSessionFactory){
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}