重整非網路服務系統成為網路服務系統

THUIR > College of Engineering > Department of Computer Science and Information > Master's Theses > Item 310901/5037

Please use this identifier to cite or link to this item: http://140.128.103.80:8080/handle/310901/5037

Title:	重整非網路服務系統成為網路服務系統
Other Titles:	Re-engineering Non-Web Services to Web Services
Authors:	許俊雄 Hsu, Chun-Hsiung
Contributors:	朱正忠 Chu, Cheng-Chung 東海大學資訊工程學系
Keywords:	軟體重整工程;軟體再使用;網路服務;多層次架構 Software Reengineering;Software Reuse;Web Services;N-tier
Date:	2004
Issue Date:	2011-05-19T07:32:44Z (UTC)
Abstract:	電腦從發明到現在已經有幾十年的歷史，在這之中產生了許多優秀的程式，但是隨著電子技術的進步、軟體理論的成熟、網路通訊的發達，電腦系統應用架構更從舊有核心應用(core legacy application)轉化到Client/Server及web-enabled架構，再逐步轉化至分散式運算(Distributed computing)架構，技術快速地改變造成在這每一轉換的階段裡，許多優秀的軟體由於無法適應變化，而被淹沒在時代洪流之中。一個好的建築物可以永世留存，傑出的設計建築風格更被當成後世的典範，而能不斷地被複製及延伸。一個電腦應用系統或許不能適應新環境而被淘汰，但是在這系統內部或許也存在足可為後世典範的設計及可被再發展的概念，如果讓這些設計及概念隨著系統淘汰而遺失，是一件非常可惜的事。在過去的10年裡，全球化的競爭環境及網路溝通無國界化，使得軟體系統需要負擔著從前更龐大的資料流量及更繁複的業務處理邏輯，造成系統設計因此也越趨複雜化。在這情況下，系統開發者追求著一可快速地開發、可便利地擴充、可簡單地維護的高品質軟體似乎是天方夜譚。但若以另一個角度思考，一個具可延展性、可維護性、再使用性的高品質軟體開發是從舊有基礎上來建立，則開發者可以縮短許多開發時間，則追求高品質且低時程的軟體開發過程依然是有可作為。此篇論文根據重整工程原理提供一連串步驟來萃取舊有系統(legacy system)的設計元素，並依據軟體再使用(software reuse)理論為基礎，以N-tier架構建立一軟體架構，使架構其上的系統是可以被延展且易於維護的，而搭配網路服務(web services)更可為應用系統提供增加元件重複使用及系統整合的特性。 The computer from invented already has several dozens years history to the present, has had many outstanding formulas in this, but along with the electronic technology progress, the software theory was mature, network communication developed, the computer system from old has the core using the overhead construction to apply core legacy application to transform to Client/Server and the web-enabled overhead construction, again gradually transformed to the disperser -like operation overhead construction, fast changed creates in each stage many outstanding software because were unable to adapt the change, but is submerged in the time mighty current. A good building may always preserve, the outstanding design construction style is regarded as later generations'' model, but unceasingly is duplicated and extends. Perhaps a computer application system cannot adapt the new environment to eliminate, perhaps but also exists in this system interior fully may for the later generations model design and may the concept which develops again, if lets these designs and the concept loses along with the system elimination, is a matter which extremely was a pity. In the past 10 years, the globalization competition environment and the network communication did not have the national boundary, caused the software system to shoulder compared to the before more massive data processing and the complicated handling of traffic, the system design more hasten the complication. In this situation, the system development pursue one may fast develop the high quality software which, may conveniently expand, may simply maintain as if is Arabian Nights. But pondered by another angle that, may the ductility, maintainable, the again use high quality software development be from old has the foundation to come up the establishment, then may achieve the development demand. This paper basis rallies the project to provide a succession of step to come the extract old has the legacy system the design element, and uses the theory based on the software is a foundation again, establishes a software overhead construction by the N-tier overhead construction, causes above the overhead construction the system is may delay also be easy to maintain, but matches the web services to be possible to provide the increase part repetition use and the system conformity characteristic for the application system.
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