Spring Boot多个数据源LazyLoadingException

Question

我有一个Spring Boot应用程序（v1.4.3），我的对象使用默认的Jackson Object Mapper序列化，如下所示：

@RequestMapping(value = "diagnosis", method = RequestMethod.GET)
public Object diagnosis(Filter filter, Pageable pageable) {

    if (filter) {
        return eventRepository.findAll(filter.toSpecification(), pageable)
    }

    return eventRepository.findAll(pageable)

}

如果我只定义一个数据源（application.yml＆＃39; spring.datasource ...＆＃39;，从spring开始自动配置），一切正常。

现在我需要配置两个数据源。对于每个数据源，我编写了一个配置类。

UserDatasource

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "xxx.repository.user", entityManagerFactoryRef = "userEntityManager", transactionManagerRef = "userTransactionManager")
class DatasourceConfigurationUser {

    @Autowired
    private DatasourceSettingsUser datasourceSettingsUser

    @Primary
    @Bean(name = "userDataSource")
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource()
        dataSource.setDriverClassName(datasourceSettingsUser.driverClassName)
        dataSource.setUrl(datasourceSettingsUser.url)
        dataSource.setUsername(datasourceSettingsUser.username)
        dataSource.setPassword(datasourceSettingsUser.password)
        return dataSource
    }

    /*
     * Entity Manager Factory setup.
     */

    @Primary
    @Bean(name = "userEntityManager")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws NamingException {
        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean()
        factoryBean.setDataSource(dataSource())
        factoryBean.setPackagesToScan(["xxx.model.user"] as String[])
        factoryBean.setJpaProperties(datasourceSettingsUser.toHibernateProperties())
        factoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter())
        return factoryBean
    }

    @Primary
    @Bean(name = "userTransactionManager")
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
        JpaTransactionManager txManager = new JpaTransactionManager()
        txManager.setEntityManagerFactory(emf)
        return txManager
    }

}

DataDatasource

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "xxx.repository.data", entityManagerFactoryRef = "dataEntityManager", transactionManagerRef = "dataTransactionManager")
class DatasourceConfigurationData {

    @Autowired
    private DatasourceSettingsData datasourceSettingsData

    @Bean(name = "dataDataSource")
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource()
        dataSource.setDriverClassName(datasourceSettingsData.driverClassName)
        dataSource.setUrl(datasourceSettingsData.url)
        dataSource.setUsername(datasourceSettingsData.username)
        dataSource.setPassword(datasourceSettingsData.password)
        return dataSource
    }

    /*
     * Entity Manager Factory setup.
     */

    @Bean(name = "dataEntityManager")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws NamingException {
        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean()
        factoryBean.setDataSource(dataSource())
        factoryBean.setPackagesToScan(["xxx.model.data"] as String[])
        factoryBean.setJpaProperties(datasourceSettingsData.toHibernateProperties())
        factoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter())
        return factoryBean
    }

    @Bean(name = "dataTransactionManager")
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
        JpaTransactionManager txManager = new JpaTransactionManager()
        txManager.setEntityManagerFactory(emf)
        return txManager
    }

}

现在我得到令人讨厌的LazyLoadingExceptions，因为在Jackson Mapper序列化期间无法获取Lazy Collections。我想知道为什么这是使用默认的Spring Boot Datasource !!

在数据源配置期间有什么我错过的吗？

编辑1

这适用于服务层。

@Service
@Transactional
class EventService {

    @Autowired
    private EventRepository eventRepository

    def findAll(Pageable pageable) {

        Page<Event> page = eventRepository.findAll(pageable)

        page.content.each {
            it.config.event.size()
            it.config.system.size()
            it.config.subsystem.size()
        }

        return page

    }

}

但它对每个查询都非常具体： - （