July 2019
Intermediate to advanced
480 pages
9h 35m
Chinese
Content preview from 持續交付｜使用Java
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Java app 的部署平台、基礎設施，以及持續交付 |
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你也可以修改及限制 PaaS 公開的執行環境與 OS。你除了可以限制網路與檔案系統之類
的資源的使用（可在 Java 執行環境或 OS 裡面實作）之外，也可以控制或限制資源（例
如 CPU 的使用是常見的目標），也可以讓平台實例（與其他基礎設施，例如網路路由器
或 IP 位址）暫態存在。了解它們之後，你可以將學到的知識寫入組建管道，例如斷言
你的 app 在負載過重時不會產生
OutOfMemoryExceptions
，或 app 可以優雅地處理強制重
新啟動。
現代的 PaaS 文件（大致上）都很優秀
根據我的經驗，大部分熱門的 Java 友善 PaaS 都提供很棒的文件，無論是關於
開發者流程、執行期環境，或任何警告或限制。例如，Google App Engine 團
隊寫了一份詳盡的說明，介紹它的 Java 7 執行環境（
http://bit.ly/2OSuQZy
）
（現在已棄用）以及 Java 8 執行環境（
http://bit.ly/2xEx5JF
）Cloud Foundry
團隊也製作類似的說明，介紹相應的 Java 組建封包與執行環境（
http://bit.
ly/2OTAmeL
），且各家 CF 供應商通常都會提供額外的文件說明它們的環境特有
的細節。
如果你認為託管式 PaaS 最適合你的專案，需要注意的最後一件事就是託管商品的定價
方式。大部分的 Java PaaS 都是用每個 app 實例的記憶體來定價的，而 app 實例的數量 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.