April 2022
Beginner to intermediate
344 pages
9h 32m
Japanese
Content preview from はじめての設計をやり抜くための本 第2版 概念モデリングからアプリケーション、データベース、アーキテクチャ設計、アジャイル開発まで
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ジックを入れないだけ、DomainModelをシンプルに保つことができます。
結局のところ、オブジェクト指向のカプセル化という考え方のメリットも
デメリットも踏まえたうえで、ビジネスロジックとデータをカプセル化する
のかが論点になると思います。多くの場合、データベースのテーブルに変更
があれば、ビジネスロジックにも影響が及ぶのが普通ですので、Domain
Modelにメリットがあるように思えます。ただ、DomainModelにもデメ
リットはあるので、TransactionScriptを採用した場合にカプセル化が行え
ない分のデメリットを他の設計手法で担保できればよいのです。このトレー
ドオフは、開発プロジェクトによって判断するしかないでしょう。
TransactionScript
と
DomainModel
この議論にはまだ結論は出ていないようです。ただ、非常に主観ですが、
やはりJavaで開発することが多い人には、TransactionScriptを支持する
傾向があるように思います。Java では、ビジネスロジックの細分化が非常
に進んでいます。個人的にはやり過ぎだと思うほどです。EJBやStruts、
DI などのJavaコミュニティが提供するさまざまなフレームワークの影響が
あるように思います。フレームワークを使ってシステムを開発すると、自
然とそのフレームワークが持つ設計思想のようなものを受け継いで設計し
てしまいます。それは良いことで、優秀な ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.