我有一个事务服务调用第二个具有 REQUIRES_NEW 传播的服务。
激活日志我看到 Spring 在创建子事务时创建了一个新的 Hibernate Session,即使当前线程已经有一个打开的 Session。
[DEBUG] org.springframework.transaction.interceptor.AbstractFallbackTransactionAttributeSource.getTransactionAttribute(AbstractFallbackTransactionAttributeSource.java:106) Adding transactional method 'executeProcessed' with attribute: PROPAGATION_REQUIRES_NEW,ISOLATION_DEFAULT; ''
[DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager.doGetTransaction(HibernateTransactionManager.java:437) Found thread-bound Session [org.hibernate.impl.SessionImpl@467743d7] for Hibernate transaction
[DEBUG] org.springframework.transaction.support.AbstractPlatformTransactionManager.handleExistingTransaction(AbstractPlatformTransactionManager.java:415) Suspending current transaction, creating new transaction with name [com.microsigns.ds.businesslogic.rendering.service.impl.PipelineDataServiceImpl.executeProcessed]
[DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:493) **Opened new Session** [org.hibernate.impl.SessionImpl@3d4b1aad] for Hibernate transaction
[DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:504) Preparing JDBC Connection of Hibernate Session [org.hibernate.impl.SessionImpl@3d4b1aad]
[DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:569) Exposing Hibernate transaction as JDBC transaction [jdbc:postgresql://localhost:5432/ds, UserName=microsignsdds, PostgreSQL Native Driver]
重用会话在性能方面不应该更好吗?这也将避免必须在子事务中重新加载或重新附加对象。我在这里想念什么?
这种行为在 org.springframework.orm.hibernate3.HibernateTransactionManager 中被硬编码:
xObject.getSessionHolder().setSynchronizedWithTransaction(true);
我正在使用休眠 3.6 和 Spring 3.1