【04-09】spring boot 多数据源

@EnableTransactionManagement // 开启注解事务管理，等同于xml配置文件中的 <tx:annotation-driven />
public class ProfiledemoApplication implements TransactionManagementConfigurer {

    @Resource(name="jpaTransactionManager")
    private PlatformTransactionManager jpaTransactionManager;

  // 创建事务管理器
    @Bean(name = "swiftTransactionManager")
    public PlatformTransactionManager txManager(DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    // JPA事务管理器
    @Bean(name = "jpaTransactionManager")
    public PlatformTransactionManager jpaTransactionManager(EntityManagerFactory factory) {
        return new JpaTransactionManager(factory);
    }

    // 实现接口 TransactionManagementConfigurer 方法，其返回值代表在拥有多个事务管理器的情况下默认使用的事务管理器
    @Override
    public PlatformTransactionManager annotationDrivenTransactionManager() {
        return jpaTransactionManager;
    }

}

@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class,
		DataSourceTransactionManagerAutoConfiguration.class })
@EnableTransactionManagement
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

	@Autowired DataInitializer initializer;

	@PostConstruct
	public void init() {

		CustomerId customerId = initializer.initializeCustomer();
		initializer.initializeOrder(customerId);
	}
}

@Configuration
@EnableJpaRepositories("com.acme.repositories")
class AppConfig {

  @Bean
  public DataSource dataSource() {
    return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2).build();
  }

  @Bean
  public JpaTransactionManager transactionManager(EntityManagerFactory emf) {
    return new JpaTransactionManager(emf);
  }

  @Bean
  public JpaVendorAdapter jpaVendorAdapter() {
    HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
    jpaVendorAdapter.setDatabase(Database.H2);
    jpaVendorAdapter.setGenerateDdl(true);
    return jpaVendorAdapter;
  }

  @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
    LocalContainerEntityManagerFactoryBean lemfb = new LocalContainerEntityManagerFactoryBean();
    lemfb.setDataSource(dataSource());
    lemfb.setJpaVendorAdapter(jpaVendorAdapter());
    lemfb.setPackagesToScan("com.acme");
    return lemfb;
  }
}