@Transactional 不能与 Websphere 中的 @Async 一起使用

Question

我尝试在

@Transactional

方法中使用

@Async

来跟踪文件转换过程，如下所示：

@Async
@Transactional
public void convertFile(String documentId){
     
    CustomLog customLog = new CustomLog();
    customLog.setStatus("IN_PROGRESS");
    mySpringDataRepo.save(customLog);
    try{
      doConvertFunction(documentId);    
    }catch(Exception e){
      customLog.setStatus("FAIL");
      mySpringDataRepo.save(customLog);
      return;
    }
    customLog.setStatus("SUCCESS");
    mySpringDataRepo.save(customLog);
       
}

我正在使用以下技术：

• Springboot 2.7.18
• hibernate-core-5.6.15.Final
• Websphere ND 9.0.5.13
• Java 8

我的EntityManager配置：

@Primary
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder,
    DataSource dataSource) {
    LocalContainerEntityManagerFactoryBean em = builder.dataSource(dataSource).packages("com.myapp").persistenceUnit("MyEntityManagerFactory").properties(jpaProperties()).build();
    JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
    em.setJpaVendorAdapter(vendorAdapter);
    return em;
}

protected Map<String, Object> jpaProperties() {
        Map<String, Object> props = new HashMap<>();
        props.put("hibernate.physical_naming_strategy", CamelCaseToUnderscoresNamingStrategy.class.getName());
        props.put("hibernate.implicit_naming_strategy", SpringImplicitNamingStrategy.class.getName());
        return props;
    }

在 Tomcat 9 上运行上述代码时，它工作得很好，但是当尝试在 Websphere 上运行它时，事务不会打开，并且 save 方法根本不会执行！

我做了几次尝试，但没有成功，如下：

1- 使用

@Transactional(propagation = Propagation.REQUIRES_NEW)

2- 将 save 方法提取为新的单独服务方法，如下所示：

@Service
public class MyService {

    @Autowired
    private MySpringDataRepo mySpringDataRepo;

    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public CustomLog save(CustomLog customLog) {
        mySpringDataRepo.save(customLog);
        return customLog;
    }

}

更新：

在 Websphere 上工作的唯一解决方案是通过 EntityManagerFactory 创建 EntityManager，如下所示：

 @Service
public class CustomLogService{

    @Autowired
    private EntityManagerFactory entityManagerFactory;

    
    public Long save(CustomLog customLog) {
        EntityManager entityManager = entityManagerFactory.createEntityManager();
        entityManager.getTransaction().begin();
        entityManager.persist(customLog);
        entityManager.flush();
        entityManager.getTransaction().commit();
        return customLog.getId();
    }

    public CustomLog find(Long id) {
        EntityManager entityManager = entityManagerFactory.createEntityManager();
        entityManager.getTransaction().begin();
        CustomLog customLog = entityManager.find(CustomLog.class, id);
        entityManager.getTransaction().commit();
        return customLog;
    }

    public void update(CustomLog customLog) {
        EntityManager entityManager = entityManagerFactory.createEntityManager();
        entityManager.getTransaction().begin();
        entityManager.merge(customLog);
        entityManager.getTransaction().commit();
    }

}

并将我的@Async代码更改为如下：

@Async
public void convertFile(String documentId){

    CustomLog customLog = new CustomLog();
    customLog.setStatus("IN_PROGRESS");
    customLogService.save(customLog);
    try{
      doConvertFunction(documentId);    
    }catch(Exception e){
      customLog = customLogService.find(customLog.getId());
      customLog.setStatus("FAIL");
      customLogService.update(customLog);
      return;
    }
    customLog = customLogService.find(customLog.getId());
    customLog.setStatus("SUCCESS");
    customLogService.update(customLog);

}

我尝试按如下方式注入entityManager，但它不起作用，只有从EntityManagerFactory创建entityManager才有效：

@PersistenceContext(name = "MyEntityManagerFactory")
private EntityManager entityManager;

此解决方案中是否有任何缺点/需要考虑的事项，因为我将大量使用此方法并且每次调用它时都会返回一个新的 EntityManager 实例？

Answer 1

尝试这个配置代码：

@Configuration
@EnableJpaRepositories(basePackages = { "com.myapp.dao" }, transactionManagerRef = "websphereTxManager")
@EnableTransactionManagement
public class WebSphereDBConfiguration {

    @Resource(lookup = "jdbc/sample", name = "java:comp/env/jdbc/sample")
    private DataSource dataSource;

    @Primary
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean() {
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setPackagesToScan("com.myapp.entity");
        entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
        entityManagerFactoryBean.setDataSource(dataSource);
        entityManagerFactoryBean.setJpaPropertyMap(jpaProperties());
        return entityManagerFactoryBean;
    }

    @Bean
    public EntityManagerFactory entityManagerFactory(LocalContainerEntityManagerFactoryBean entityManagerFactoryBean) {
        return entityManagerFactoryBean.getObject();
    }

    @Bean
    public PlatformTransactionManager websphereTxManager(EntityManagerFactory entityManagerFactory) {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory);
        return transactionManager;
    }


    protected Map<String, Object> jpaProperties() {
        Map<String, Object> props = new HashMap<>();
        props.put("hibernate.physical_naming_strategy", CamelCaseToUnderscoresNamingStrategy.class.getName());
        props.put("hibernate.implicit_naming_strategy", SpringImplicitNamingStrategy.class.getName());
        return props;
    }


}