英文:
@Transactional not starting transactions with Spring Boot 3 / Hibernate 6
问题
我目前正在迁移至 Spring Boot 3 / Hibernate 6。Hibernate 正确解析所有实体和存储库，连接到数据库等等...
然而，似乎 @Transactional 没能正确启动事务。
小例子：
@Component
public class Test {
@Autowired
private EntityManagerFactory entityManager;
@Transactional
public void test() {
Session s = entityManager.unwrap(SessionFactory.class).getCurrentSession();
s.createQuery("FROM sometable").list();
}
}
错误：
Caused by: org.hibernate.HibernateException: 调用方法 'createQuery' 在没有活动事务的情况下无效（当前状态：NOT_ACTIVE）
at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:341)
相关配置：
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages="com.somepackage")
@EntityScan(basePackages="com.somepackage")
public class TransactionConfig {
...
}
在 application.properties 中的 session context 类设置：
...
spring.jpa.properties.hibernate.current_session_context_class=thread
...
如果我移除上述设置中的 session_content_class=thread，我会收到这个错误：
Caused by: org.hibernate.HibernateException: 未配置 CurrentSessionContext
编辑 1：
以下仍导致相同错误 "在没有活动事务的情况下无效"：
@PersistenceUnit
private EntityManagerFactory entityManager;
编辑 2：
如果我不 unwrap 一个 session，只是调用一个继承自 JpaRepository 的类，它可以工作... 但它会创建一个新的事务并忽略父 @Transaction。
英文:
I am currently migrating to Spring Boot 3 / Hibernate 6.
Hibernate is correctly parsing all the entities and repos, connecting to the database, etc...
However, it seems @Transactional is not starting transactions correctly.
Small example:
@Component
public class Test {
@Autowired
private EntityManagerFactory entityManager;
@Transactional
public void test() {
Session s = entityManager.unwrap(SessionFactory.class).getCurrentSession();
s.createQuery("FROM sometable").list();
}
}
Error:
Caused by: org.hibernate.HibernateException: Calling method 'createQuery' is not valid without an active transaction (Current status: NOT_ACTIVE)
at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:341)
Relevant Config:
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(basePackages="com.somepackage")
@EntityScan(basePackages="com.somepackage")
public class TransactionConfig {
...
}
session context class in application.properties
...
spring.jpa.properties.hibernate.current_session_context_class=thread
...
If I remove the above setting of session_content_class=thread,
I get this error:
Caused by: org.hibernate.HibernateException: No CurrentSessionContext configured
Edit 1:
The below still results in the same error "is not valid without an active transaction"
@PersistenceUnit
private EntityManagerFactory entityManager;
Edit 2:
If I do not unwrap a session and just call a class with extends extends JpaRepository, it works... but it creates a new transaction and ignores the parent @Transaction
答案1
得分: 0
修正如下：
@PersistenceContext
private EntityManager entityManager;
解开为：
Session s = entityManager.unwrap(Session.class);
英文:
Fix was the following:
@PersistenceContext
private EntityManager entityManager;
and to unwrap:
Session s = entityManager.unwrap(Session.class);
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