When the tag is processed, the container will take its name and attributes, as well as any content that may exist in the body of the tag, and pass it to one or more class files for handling.
Default exception handling by the EJB container during a transaction has a couple of significant changes between V3.x and V4.
在事务中通过ejb容器进行缺省异常处理在V3 . x和V 4中存在一些重要的更改。
3
These methods open the bean to receiving three additional callbacks from the container to allow the proper handlingof transaction state within the bean.