一个遗留系统向SOA架构的改造及其性能技术研究论文定稿.docxVIP

浙江大学硕士学位论文  STYLEREF 标题,章标题(无序号) \* MERGEFORMAT Error! No text of specified style in document.  PAGE ii 遗留系统的性能改进分析及其研究 摘要 随着软件工程的发展，软件再工程被摆上了软件专家的议程，由于遗留系统存在技术陈旧、系统结构混乱、文档缺失和维护成本高等问题，越来越多的企业和组织为了提高系统的可靠性、可重用性、可维护性，从而对遗留系统进行再工程。 本论文主要研究的是以现存的大型遗留系统为背景，首先对当前国内外的遗留系统再工程的现状进行分析；其次介绍了遗留系统的架构和Cordys系统在整个系统中的核心地位；再者介绍了Cordys平台相关技术，SOAP和LDAP，重点分析了Cordys的WCP内部代码实现原理、Cache的实现机制；最后重点分析生产环境中Cordys产生的问题，通过在本地环境模拟测试的方式再现了生产环境的代码40、41和Signal 11等问题，然后通过代码反编译技术和Jprofiles性能测试工具查找问题的根源，最后解决了生产环境的问题。 关键词：遗留系统再工程，Cordys，LDAP，SOAP，性能测试  浙江大学硕士学位论文 Abstract 浙江大学硕士学位论文 Abstract  PAGE ii  PAGE iii Abstract With the develoyment of Software Engineering technology, Software Re-engineering is put into the aganda by the software experts.Since they are several problem in legacy system, like technological obsolescence, system architecture confusion, miss document, costly maintenance and so on. more and more enterprise and organiztions re-engineering of legancy system to improve the system reliability, reusability and maintainability of system. This paper focuses on the background of existing large legacy system, firstly, analyzes the situation of the current legacy systems re-engineering at home and abroad ; Secondly introduces the role of the system architecture and cordys in the whole system;thirdly, introduces the cordys platform and related technologies:SOAP and LDAP with analyzeing the code which implements the WCP and cache in cordys;. Finally analyzes cordys issue in production environment, reproduces Error with number 40,41 and signal 11 in the way of simulation local test , then decompilation code and finds the profuction root cause with the jprofile performance test tool. Key Words：Legacy Systems Re-engineering, Cordys, LDAP , SOAP, Performance Testing  浙江大学硕士学位论文