multiple jdbc instance

@Configuration
public class DatabaseConfig {

    @Bean(name = "dsSlave")
    @ConfigurationProperties(prefix="spring.mysql_slave")
    public DataSource slaveDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "dsMaster")
    @Primary
    @ConfigurationProperties(prefix="spring.mysql_master")
    public DataSource masterDataSource() {
        return DataSourceBuilder.create().build();
    }

   @Bean(name = "jdbcSlave")
@Autowired
public JdbcTemplate slaveJdbcTemplate(@Qualifier("dsSlave") DataSource dsSlave) {
    return new JdbcTemplate(dsSlave);
}

    @Bean(name = "jdbcMaster")
    @Autowired
    public JdbcTemplate masterJdbcTemplate(@Qualifier("dsMaster")DataSource dsMaster) {
        return new JdbcTemplate(dsMaster);
    }

}




@Component
public class SqlService {

    @Autowired
    @Qualifier("jdbcSlave")
    private JdbcTemplate jdbcTemplate;

    public String getHelloMessage() {
        String host = jdbcTemplate.queryForObject("select @@hostname;", String.class);
        System.out.println(host);
        return "Hello";
    }

}