July 2019
Intermediate to advanced
480 pages
9h 35m
Chinese
Content preview from 持續交付｜使用Java
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設計持續交付架構 |
31
架構功能
Accelerate
（IT Revolution Press）的作者群Nicole Forsgren、Jez Humble 與
Gene Kim 在他們的 State of DevOps 研究中提出一系列的
能力
。這些關鍵的能
力以具有統計意義的方式促進軟體交付性能。其中的兩項重要的架構能力包括
使用鬆耦合架構（相較於高耦合的系統，可讓團隊獨立工作，而且在部署與測
試時需要較少的協調工作），以及授權團隊設計架構（可讓團隊選擇想要使用
的工具，將持續交付做得更好）。
同一群作者寫的State of DevOps Report 2017（
https://puppet.com/resources/
whitepaper/state-ofdevops-report
）研究報告展示最有可能實現持續交付的架構，
就是鬆耦合架構（以及鬆耦合團隊）。
高內聚
內聚
是元件內的元素互屬（belong together）的程度，在程式設計中，它被視為一個
模組或類別內的各個功能之間的關係強度。高內聚的模組通常比較好，因為高內聚與
軟體的一些理想特徵有關，包括穩健性、可靠性、復用性和可理解性。相較之下，低
內聚與不良的特徵有關，例如難以維護、測試、復用，甚至了解。你可以在
java.util.
concurrent
（
http://bit.ly/2DwCKXB
）套件找到很好的 Java 語言範例，它裡面的類別都以
內聚的方式，提供並行（concurrency）相關功能。典型的 Java 反例是
java.util ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.