Spring Data JDBCΛ
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ࣗݾ঺հ • ਐ౻ɹྒྷ @shindo_ryo • Acroquest Technologyגࣜձࣾ • (ݩ)จܥJavaΤϯδχΞ

Spring Data JDBC is Կ

Spring ͷ DB ΞΫηεϥΠϒϥϦ
 (·ͩ1.0.0.BUILD-SNAPSHOT)

΋͏͋Δ͡ΌΜ • Spring JDBC (JdbcTemplate) • mybatis-spring • Spring Data JPA

Կ͕ҧ͏ͷ͔

Spring Data JDBC ͸ DBΞΫηεͷ
 ࣮૷Λఏڙ͠ͳ͍

Spring Data JDBC ͸Ξμϓλʔ Spring Data JDBC Spring JDBC MyBatis <> Repository ࣮૷ͷ੾Γସ͑͸ BeanఆٛͰߦ͏

;Θͬͱݴ͏ͱɺ
 DDDຊͷRepository ύλʔϯΛ ޷͖ͳ࣮૷Ͱ؆୯ʹͭ͘ΕΔΞϨ

EmployeeRepository.java public interface EmployeeRepository extends CrudRepository { @Query("select * from employee where age > :age") List findByAgeOlderThan(@Param(“age") int age); } ͔͍͔ͭͨ

@Autowired EmployeeRepository repository; // insert or update repository.save(employee); // select Iterable employees = repository.findAll(); Optional employee = repository.findById(id); List employees = repository. findByAgeOlderThan(30); // delete repository.delete(employee); ͔͍͔ͭͨ

Spring JDBC ࣮૷ͷ৔߹ SpringDataJdbcConfig.java @Configuration @EnableJdbcRepositories public class SpringDataJdbcConfig { @Bean DataAccessStrategy dataAccessStrategy(JdbcMappingContext context) { return new DefaultDataAccessStrategy( new SqlGeneratorSource(context), context); } }

Ͷɺ؆୯Ͱ͠ΐ͏ʁ

MyBatis ࣮૷ͷ৔߹ SpringDataJdbcConfig.java @Configuration @EnableJdbcRepositories public class SpringDataJdbcConfig { @Bean DataAccessStrategy dataAccessStrategy(SqlSession sqlSession) { return new MyBatisDataAccessStrategy(sqlSession); } }

application.properties mybatis.mapper-locations=
 classpath:/com/example/demo/mapper/*Mapper.xml ɹɹɹˡMapperϑΝΠϧͷϩέʔγϣϯΛࢦఆ͢Δ mybatis.type-aliases-package=com.example.demo ɹɹɹˡEntityΫϥεͷύοέʔδΛࢦఆ͢Δ MyBatis ࣮૷ͷ৔߹

EmployeeMapper.xml INSERT INTO employee (firstname, lastname, age, hired_at) VALUES (#{instance.firstname}, #{instance.lastname}, #{instance.age}, #{instance.hiredAt}) ……… MyBatis ࣮૷ͷ৔߹ CrudRepository ͷϝιου ʹରԠͨ͠SQLΛఆٛ͢Δ

Ͷɺ؆୯Ͱʢུʣ

جຊతʹɺDataAccessStrategy 
 ͷ࣮૷Λ੾Γସ͑Δ͚ͩ

DataAccessStrategy 
 Λࣗ෼Ͱ࣮૷͢Ε͹
 ͲΜͳORMʹ΋࢖͑Δ

΋ͪΖΜHibernate΋ΠέΔ

ͦΕԿͯ Spring Data JPA

Hibernate ࣮૷ͷ৔߹ SpringDataJdbcConfig.java @Configuration @EnableJdbcRepositories @EnableAutoConfiguration(exclude = HibernateJpaAutoConfiguration.class) public class SpringDataJdbcConfig { @Bean DataAccessStrategy dataAccessStrategy() { return new HibernateDataAcccessStrategy( localSessionFactoryBean().getObject()); } …

Hibernate ࣮૷ͷ৔߹ SpringDataJdbcConfig.javaʢଓ͖ʣ @Bean LocalSessionFactoryBean localSessionFactoryBean() { LocalSessionFactoryBean localSessionFactoryBean = new LocalSessionFactoryBean(); localSessionFactoryBean.setDataSource(datasource); localSessionFactoryBean.setAnnotatedClasses(Employee.class); (தུ) return localSessionFactoryBean; } @Bean HibernateTransactionManager transactionManager( LocalSessionFactoryBean sessionFactory) { HibernateTransactionManager txManager = new HibernateTransactionManager(); txManager.setSessionFactory(sessionFactory.getObject()); return txManager; } spring-boot-starter-data-jpa ͸࢖Θͳ͍ͷͰࣗલఆٛ

Hibernate ࣮૷ͷ৔߹ HibernateDataAcccessStrategy.java public class HibernateDataAcccessStrategy implements DataAccessStrategy { private SessionFactory sessionFactory; public HibernateDataAcccessStrategy( SessionFactory sessionFactory) { … } private Session currentSession() { … } @Override public void insert(T instance, Class domainType, Map additionalParameters) { Session session = currentSession(); session.save(instance); session.flush(); } …

Ͷɺ̺ʢུʣ

͔͍ͨͨͷܗ੻ Employee.java @Entity public class Employee { @org.springframework.data.annotation.Id @javax.persistence.Id @Column(name="employee_number") @GeneratedValue(strategy= GenerationType.IDENTITY) private Long employeeNumber;

Spring Data JDBC͸
 ·ͩ·ͩൃల్্

͜ΜͳIssue͕͋Γ·͢ • Support for ValueObjects/Embbeded • Pagenation abstraction • @Column • etc…

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