The Research on The Software Coordination Mechanism in Reengineering A Centralized Software Component into A Distributed Service

• Main Authors: Po-Jun Tung, 童柏潤
• Other Authors: Jim-Min Lin
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/cux6tq

碩士 === 逢甲大學 === 資訊工程所 === 90 === Many off-the-shelf software applications have been manufactured and run under the single-user/ single—tasking operating systems such as DOS and Microsoft Windows. Most of them have been operated, validated and verified over and over again. Therefore, the quality and applicability seems to be high. If we can adapt these software products into multi-user/multi-tasking distributed environments, we may obtain several benefits such as acceleration and cost reduction of the development. Furthermore, it may additionally promote the quality and the competitiveness for an industry. In order to achieve the goal, we have to firstly deal with the problems of concurrency control. In this study, we propose an efficient way to deal with the issues above. In order to present it, an experimental system under the Windows platform will be proposed to demonstrate our study. In this system, we aim to adapt an existing centralized application, DBASE III PLUS, into an executable component under distributed multi-user environment. Therefore, we have to concern the concurrency control and synchronization problems, such as the synchronous transactions. To cope with it, Timestamp ordering is the algorithm adopted in our study to meet the data consistency.