May 2024
Intermediate to advanced
752 pages
24h
Japanese
Content preview from Spring徹底入門 第2版 Spring FrameworkによるJavaアプリケーション開発
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7.4 共通処理の実装
HandlerInterceptor
【9】
インターフェイスが利用できます。なお、
AsyncHandlerInterceptor
に
よる共通処理は、「非同期実行が終了してからHTTPレスポンスを開始」、「非同期実行の処理中に
HTTPレスポンスを開始」どちらのパターンでも適用されます。
7.4
共通処理の実装
本節では、
Controller
の
Handler
メソッドの呼び出し前後に共通処理を実行する方法について説明します。
サーブレットフィルタの利用
Spring MVC
（
DispatcherServlet
）の呼び出し前後に共通する処理を実行するには、
javax.servlet.Fil
ter
インターフェイスの実装クラスを作成します。
javax.servlet.Filter
を直接実装してもよいのですが、ここ
では
Spring
が提供しているサポートクラスを利用する方法を紹介します（表 7.3）。
表
7.3
Spring
が提供するサーブレットフィルタのサポートクラス
クラス名 説明
GenericFilterBean
サーブレットフィルタの初期化パラメータを、サーブレットフィルタクラスのプロパティにバイ
ンドする機能を持つ基底クラス
OncePerRequestFilter
同一リクエスト内で１回だけ処理が実行されることを担保する機能を持つ基底クラス。
Generic
FilterBean
を継承しており、Spring ...
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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.