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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279
導
入
編
1
設
計
編
ア
キ
テ
ク
チ
ャ
編
2
3
4
5
6
7
6
アプリケーション層（WWW、メール）
プレゼンテーション層（HTML）
セッション層（HTTP）
トランスポート層（TCP、UDP）
ネットワーク層（IP）
リンク層（Ethernet）
物理層（光ファイバー、電話線）
図
6
-
9
：
OSI
参照モデル
ご存じの方にとっては今さらでしょうが、アーキテクトとしても知ってお
いたほうがよい基礎知識なので覚えておきましょう。
レイヤーアーキテクチャは、Webアプリケーションでは一般的に使用さ
れています。基本的に3層です。亜流として4層にすることもありますが、
基本的な考え方は大きく変わりません。3層のレイヤーには名前が付いてい
ますが、人や出典によってレイヤーの呼び名が若干異なります。ただ、意味
は同じですので、名前が多少違っても気にしないでください。
マーチン・ファウラー氏の著書『Patterns Of Enterprise Application
Architecture』では、図6-10に示す3レイヤーとして紹介されています。
Presentation Layer
（サービスの提供、情報の表示）
Domain Layer
（ビジネスロジックの提供）
Data Source Layer
（データベース接続、メッセージング）
図
6
-
10
：
3
レイヤーアーキテクチャ
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J2EEで は、 上 か ら「Presentation Layer」「BusinessLogic ...
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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.
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.