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平震宇 Arren Ping
CoreWork 用戶、組織及權限管理平臺
CoreWork 用戶、組織及權限管理平臺
CoreWork 用戶、組織及權限管理平臺
By
平震宇 Arren Ping
・
Changhua County, Taiwan
Connect
上圖為用戶、角色、組織資料模型設計原稿 https://corework.3medu.com # 描述 這項專案是我任職於浙江三米教育科技時執行的,在我加入三米時,並沒有規劃這個專案。 當時制定研發策略的決定人,要採用合作廠商的平臺作為用戶、角色、組織管理使用,我們基於合作備忘錄以該平臺開始開發應用,然而在合約談判過程中,廠商卻不再授權公司使用該平臺,換言之,平臺之上的應用開發等於無法繼續執行。 由於發生如此嚴峻的狀況,我直接建議運營團隊,由我們自己開發,避免未來再有發生被綁架的可能性,也才有了這個專案。 CoreWork 的目標是作為「ADLS 適性化知識診斷平臺」的底層,設計並實現支援高變動頻率的用戶、角色、組織及其權限的管理系統。 # 最困難的技術問題 由於目標市場是中國的高中,而重點的合作學校在上海,上海的高中生上課的形式類似臺灣的大學,有一個行政班,不同的課要跑堂(走班)到不同的教室上課,雖然都是數學課,但因為能力不同,要到不同的教學班上課。此外,不管是行政班還是教學班仍有二次、三次、四次分班的可能。 對每個老師來說,在意的是現狀(更關心現在帶的班級,而不是以前帶過的班級),但對學生來說,在意的卻還包括了歷程(如:一年級上學期在哪幾班、下學期在哪幾班)。 最複雜的是,每個人當下是有多重身份的,如:某老師是一年一班的班主任且是一年級數學三班的老師、某學生既是一年級一班的學生又是一年級數學一班的學生。 為了解決前述的問題,我花了不少的時間去設計可以支持版本變更,同時可完整記錄及存取每個人、每個人擔任的角色及每個組織的異動歷程。 此外,還仔細設計好 CoreWork 的 API,除了追求 DB IO 最小化之外,還要足夠讓 ADLS 的呼叫次數越少越好。 最大的一次 API 改版是發生在一個特殊的例外狀況,運營團隊開設了數十間學校檢視權限的帳號,在該帳號使用某些功能時,由於 ADLS 要查詢每個身份所能看到的資料範圍,就對 CoreWork 循序發出了大量的請求,結果就是該用戶的界面看起像是壞掉卡住不動了。 為了解決這個問題,我進行了 CoreWork API 最大幅度的一次改版,單次請求支援同一人提交多重身份。改版完成後,同樣情境的呼叫,所需時間只需原本的 1/30,效率高達原本的 30 倍。 # 技術 - Application Server|Payara Server 4.1 on Alibaba Cloud - Programming Language|Java, JavaScript - Web Technology|HTML5, CSS3 - Framework|jQuery & Java EE 7 including EJB, CDI, JPA and JSF - Version Control System|Git with GitLab.com
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平震宇 Arren Ping
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Published: Feb 5th 2020
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