Posted on 2009-12-11 00:14
leekiang 阅读(1003)
评论(0) 编辑 收藏 所属分类:
hibernate 、
jdbc、事务、并发
“Hibernate与JDBC(iBATIS) 都使用 DataSourceTransactionManager 同样可以保证事务
原理就是保证了 connection 的唯一性。
jdbc我是调spring的jdbcTemplate来操作，
经过测试。在同一个数据源的情况下直接使用Hibernate的TxManager可以同步事务，问题解决。
”
Rod Johnson的话：
引用
It is possible--and sometimes useful--to have coordinated transactions
for both. Your JDBC transactions will be managed by the
HibernateTransactionManager if you work with the same JDBC DataSource
in the same transaction. That is, create the SessionFactory using
Spring's SessionFactoryBean using the same DataSource that your
JdbcTemplates use.
The only issue to watch, of course, is that you may be invalidating
your Hibernate cache by JDBC changes. Generally I find it best to use
JDBC to update only tables that don't have Hibernate mappings.
Juergen Hoeller的话：
引用
As Rod said, simply keep using HibernateTransactionManager, which
auto-detects the DataSource used by Hibernate and seamlessly exposes
Hibernate transactions as JDBC transactions for that DataSource. JDBC
code that accesses the same DataSource via Spring will automatically
participate in such transactions.
Note that you must specify the DataSource for Hibernate via
LocalSessionFactoryBean's "dataSource" property to allow
HibernateTransactionManager to auto-detect it. Alternatively, you can
explicitly pass the DataSource to HibernateTransactionManager's
"dataSource" property.
http://www.fireflow.org/redirect.php?tid=498
Rod Johnson在spring 论坛中有一句话很好的总结了如何在测试中处理hibernate缓存:
Remember that you can clear the Hibernate session, removing objects already associated with it. This is often necessary before requerying in tests, and solves most (if not all) problems.
I typically use JDBC for verification. The pattern is
- do Hibernate operation
- flush Hibernate session
- issue JDBC query to verify results
That way I'm verifying what Hibernate did to the database in the same transaction.