Principle for automatic migrating from EJB2 to EJB3

doi:10.3778/j.issn.1002-8331.2008.20.003

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (20): 7-10.DOI: 10.3778/j.issn.1002-8331.2008.20.003

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Principle for automatic migrating from EJB2 to EJB3

LIU Lei^1,2,NI Hong²,JI Zhi-hui^1,2,KUANG Zhen-guo^1,2

1.Graduate University of Chinese Academy of Sciences，Beijing 100039，China
2.National Network New Media Engineering Research Center，Institute of Acoustics，Chinese Academy of Sciences，Beijing 100080，China

Received:2008-02-18 Revised:2008-03-24 Online:2008-07-11 Published:2008-07-11
Contact: LIU Lei

一种自EJB2向EJB3的代码自动转换规则

刘磊^1,2,倪宏²,嵇智辉^1,2,匡振国^1,2

1.中国科学院研究生院，北京 100039
2.中国科学院声学研究所国家网络新媒体工程技术研究中心，北京 100080

通讯作者: 刘磊

Abstract

Abstract: This paper，according to reference specifications of EJB2 and EJB3，provides a kind of principle for migrating the legacy EJB2-based applications to EJB3-based applications.The migrating is automatic and without any modifications of the legacy code of EJB clients.The automatic migration program is implemented using AST tools，and it’s successful to migrate XPETSTORE which is an EJB2 based demo application to EJB3 application with the software.

Key words: Enterprise JaveBeans（EJB）, JPA, migration, Abstract Syntax Tree（AST）

摘要： 参考EJB2和EJB3相关的规范，提出一种自EJB2向EJB3代码自动转换规则，解决目前基于EJB2组件的应用已被业界接受和广泛部署的情况下，EJB2组件代码自动转换为EJB3代码的问题。提出的转换规则保证了EJB2的客户端在不修改代码的情况下访问转换后的EJB3组件。利用抽象语法树AST（Abstract Syntax Tree）解析和创建Java代码，按照该转换规则，所实现的转换软件已经成功转换了XPETSTORE示例。

关键词: 企业级Java组件, Java持久API, 代码转换, 抽象语法树

LIU Lei^1,2,NI Hong²,JI Zhi-hui^1,2,KUANG Zhen-guo^1,2. Principle for automatic migrating from EJB2 to EJB3[J]. Computer Engineering and Applications, 2008, 44(20): 7-10.

刘磊^1,2,倪宏²,嵇智辉^1,2,匡振国^1,2. 一种自EJB2向EJB3的代码自动转换规则[J]. 计算机工程与应用, 2008, 44(20): 7-10.

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Principle for automatic migrating from EJB2 to EJB3

一种自EJB2向EJB3的代码自动转换规则

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