xid惟一地标识事务，它由三部分构成：格式标识符、事务界定符和分支界定符。
An XID uniquely identifies the transaction and is made up of three parts: a format identifier, a transaction qualifier, and a branch qualifier.
前向否定界定符。与肯定界定符相反；当所含表达式不能在字符串当前位置匹配时成功。
Negative lookahead assertion. This is the opposite of the positive assertion; it succeeds if the contained expression doesn't match at the current position in the string.
在基于EJB的解决方案中，EJB部署人员必须通过配置EJB部署描述符设置，告诉应用程序服务器如何处理事务界定。
In an EJB-based solution, the EJB deployer must tell the application server how transaction demarcation will be handled by configuring EJB deployment descriptor Settings.
应用推荐