带有2个数据库配置的Spring Boot – 使用第二个配置延迟加载不起作用

我有Spring Boot项目，有2个数据库配置。

主数据库配置：

@Configuration @EnableTransactionManagement @EnableJpaRepositories(transactionManagerRef = "primaryTransactionManager", entityManagerFactoryRef = "primaryEntityManagerFactory", basePackages = { "com.example.repository.primary" }) public class PrimaryDbConfig { @Primary @Bean(name = "primaryDataSource") @ConfigurationProperties(prefix = "spring.primary.datasource") public DataSource dataSource() { return DataSourceBuilder.create().build(); } @Primary @Bean(name = "primaryEntityManagerFactory") public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder, @Qualifier("primaryDataSource") DataSource dataSource) { return builder.dataSource(dataSource).packages("com.example.domain.primary").persistenceUnit("primary-persistence-unit").build(); } @Primary @Bean(name = "primaryTransactionManager") public PlatformTransactionManager transactionManager(@Qualifier("primaryEntityManagerFactory") EntityManagerFactory entityManagerFactory) { return new JpaTransactionManager(entityManagerFactory); } } 

次要的：

 @Configuration @EnableTransactionManagement @EnableJpaRepositories(entityManagerFactoryRef = "secondaryEntityManagerFactory", transactionManagerRef = "secondaryTransactionManager", basePackages = { "com.example.repository.secondary" }) public class SecondaryDbConfig { @Bean(name = "secondaryDataSource") @ConfigurationProperties(prefix = "spring.secondary.datasource") public DataSource dataSource() { return DataSourceBuilder.create().build(); } @Bean(name = "secondaryEntityManagerFactory") public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder, @Qualifier("secondaryDataSource") DataSource dataSource) { return builder.dataSource(dataSource).packages("com.example.domain.secondary").persistenceUnit("secondary-persistence-unit").build(); } @Bean(name = "secondaryTransactionManager") public PlatformTransactionManager transactionManager(@Qualifier("secondaryEntityManagerFactory") EntityManagerFactory entityManagerFactory) { return new JpaTransactionManager(entityManagerFactory); } } 

有实体加载第二个DB：

 @Entity @Table(name = "users") public class User { @OneToMany(mappedBy = "user") private List companies; 

使用：

 public interface UserRepository extends JpaRepository { User findByEmail(String email); } 

当我使用UserRepository ，会检索User但是当我点击加载公司时，我得到com.sun.jdi.InvocationException occurred invoking method. – 调用方法时出现com.sun.jdi.InvocationException 。 如果我将SecondaryDbConfig更改为@Primary或添加fetch = FetchType.EAGER则会按预期检索公司。 我已经尝试添加@Transactional(transactionManager="secondaryTransactionManager")但它没有帮助。

我错过了什么？ 使用非主数据库配置时，延迟加载实体属性的正确方法是什么？

Answer 1

尝试将@Transactional添加到检索公司列表的@Service方法或控制器。

祝你好运！