Refactoring for Migrating Web Applications to Change Database with DAO design pattern：A Case Study of ezScrum

• Main Authors: Po-Chi Huang, 黃柏棋
• Other Authors: 謝金雲
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/dzzwt8

碩士 === 國立臺北科技大學 === 資訊工程系研究所 === 103 === Over the past few years, web applications and database system technologies have been growing rapidly. There are two main reasons for a development team to change a database in web application. Frist, the application needs technical features only provided by a new database system. Second, the original database is overloaded in data volume. No matter what the reason is, however, bad design of data access architecture in the original system can not only increase effort and time in migration, but also cause damage to the system architecture after it is migrated. This paper provides a method for the refactoring of a web application for database change. The first step is to analyze potential problems that may occur if the database is changed, then work out the corresponding countermeasures. Finally, apply the DAO pattern to help make the change more efficiently. A case study is given to demonstrate the application of the proposed method.