因為要處理遺留代碼，需要在 gog 中使用手工事務， 在 resources.groovy 中進行如下定義后

testDataSourceTxManager(DataSourceTransactionManager){
    dataSource = ref('dataSource')
}

?發現 service 中的事務沒了。

?查了一下 Grails 的源碼， 原來 grails 在進行事務管理器查找的時候，并不是用的 bean 名字去查找，而是查找 所有 是 TransactionManager 實例 的 Bean， 并從得到的數組中 取第一個作為事務管理器。

?因此要使用 spring 的 DataSourceTransactionManager 的， 就不能將這個 Manager 在 Context 中定義了。只能通過自己 new 一個 單例的 DataSourceTransactionManager， 然后將 DataSource 傳入，這樣就可以用了..........

來源:http://phoenix-clt.javaeye.com/blog/430400

http://osdir.com/ml/lang.groovy.grails.user/2008-04/msg00663.html

How to operate the partition table with Hibernate & GORM

Sorry I had been on a business trip for a few days
Although the Hibernate Shards has some urgent limitations, like 'Cross-Shard
Object Graphs' , it is a wonderful solution for this. But the Hibernate
Shards has implemented its own Session/SessionFactory(etc.), maybe bring
GROM some troubles.

Thanks for your reply. And to look forward to that GROM can support
Hibernate Shards.

To take an advantage of the Spring JDBC Template for any Grail application, the first thing you need to do, is to define the DataSource bean in resources.groovy , Don't forget to have the jdbc driver(.jar) corresponding to your backend database server under the lib folder of your grail application.

http://www.rimple.com/tech/2010/3/25/calling-postgresql-stored-procedures-from-grails-part-1-the.html

http://www.tkk7.com/rain1102/archive/2008/07/18/215891.html