After developing an EJB, the programmer must set deployment descriptors that define characteristics, such as transaction support and isolation levels for the EJB.
开发了EJB后，程序员必须设置定义各种特征(如ejb的事务支持和隔离级别)的部署描述符。
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For marketing reasons, these tools are sold as programmer debugging tools, but they're equally test support tools, and I'm amazed that testing groups don't use them as a matter of course.