Springboot-Jpa多数据库配置-2.0+版本

pom.xml增加:

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

配置表同JdbcTemplate配置.

主数据源:

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactoryPrimary",
        transactionManagerRef = "transactionManagerPrimary",
        basePackages = {"com.example.demo.p"})
public class PrimaryConfig {
    @Bean(name = "primaryDataSource")
    @Primary
    @Qualifier("primaryDataSource")
    @ConfigurationProperties(prefix="spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Autowired
    @Qualifier("primaryDataSource")
    private DataSource primaryDatasource;

    //@Primary
    //@Bean(name = "entityManagerPrimary")
    //public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
    //    return entityManagerFactoryPrimary(builder).getObject().createEntityManager();
    //}

    //@Autowired
    //private JpaProperties jpaProperties;

    //private Map<String, Object> getVendorProperties() {
    //    return jpaProperties.getHibernateProperties(new HibernateSettings());//与1.5版本不同,注意.
    //}

    @Primary
    @Bean(name = "entityManagerFactoryPrimary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary(EntityManagerFactoryBuilder builder) {
        return builder.
                dataSource(primaryDatasource)
                //.properties(getVendorProperties())
                .packages("com.example.demo.p")
                .persistenceUnit("primaryPersistenceUnit")
                .build();
    }

    @Primary
    @Bean(name = "transactionManagerPrimary")
    public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject());
    }
}

主Entity:

@Entity
@Table(name = "xx")
public class Dtl {
    @Id
    @Column(name = "id")
    private Long id;

    @Column(name = "TICKER_SYMBOL")
    private String tickerSymbol;

    public Dtl() {}

    public Dtl(String tickerSymbol) {
        this.tickerSymbol = tickerSymbol;
    }

    public Long getId() {
        return id;
    }

    public String getTickerSymbol() {
        return tickerSymbol;
    }

    public void setTickerSymbol(String tickerSymbol) {
        this.tickerSymbol = tickerSymbol;
    }
}

主Repository:

public interface GetDtlP extends JpaRepository<Dtl, Long> {
    List<Dtl> findByTickerSymbol(String tickerSymbol);
}

次数据源:

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "entityManagerFactorySecondary",
        transactionManagerRef = "transactionManagerSecondary",
        basePackages = {"com.example.demo.s"})
public class SecondaryConfig {
    @Bean(name = "secondaryDataSource")
    @Qualifier("secondaryDataSource")
    @ConfigurationProperties(prefix="spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Autowired
    @Qualifier("secondaryDataSource")
    private DataSource secondaryDataSource;

    @Autowired
    private JpaProperties jpaProperties;

    private Map<String, Object> getVendorProperties() {
        return jpaProperties.getHibernateProperties(new HibernateSettings());
    }

    @Bean(name = "entityManagerFactorySecondary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactorySecondary(EntityManagerFactoryBuilder builder) {
        return builder.
                dataSource(secondaryDataSource)
                .properties(getVendorProperties())
                .packages("com.example.demo.s")
                .persistenceUnit("SecondaryPersistenceUnit")
                .build();
    }

    @Bean(name = "entityManagerSecondary")
    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
        return entityManagerFactorySecondary(builder).getObject().createEntityManager();
    }

    @Bean(name = "transactionManagerSecondary")
    public PlatformTransactionManager transactionManagerSecondary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(entityManagerFactorySecondary(builder).getObject());
    }
}

次Entity:

@Entity
@Table(name = "xx")
public class Dtl {
    @Id
    @Column(name = "id")
    private Long id;

    @Column(name = "TICKER_SYMBOL")
    private String tickerSymbol;

    public Dtl() {}

    public Dtl(String tickerSymbol) {
        this.tickerSymbol = tickerSymbol;
    }

    public Long getId() {
        return id;
    }

    public String getTickerSymbol() {
        return tickerSymbol;
    }

    public void setTickerSymbol(String tickerSymbol) {
        this.tickerSymbol = tickerSymbol;
    }
}

次Repository:

public interface GetDtlS extends JpaRepository<Dtl, Long> {
    List<Dtl> findByTickerSymbol(String tickerSymbol);
}

测试:

@RunWith(SpringRunner.class)
@SpringBootTest
public class JpaTest {

    @Autowired
    protected GetDtlP getDtlP;

    @Autowired
    protected GetDtlS getDtlS;

    @Test
    public void test() throws Exception {
        List a = getDtlP.findByTickerSymbol("3");
        List b = getDtlS.findByTickerSymbol("3");
        Assert.assertEquals(a, b);
    }
}