乗っ取れコンテナ!!開発者から見たコンテナセキュリティの考え方(CloudNative Days Tokyo 2021 発表資料)Techno
おいでいただきありがとうございます。このブログでは、ソフトウェア開発や音楽(特にB'z)、車の事などを主にてきと〜に書いていく予定です。Rio's Laboratory (http://homepage3.nifty.com/rio_i/lab/) にて、いくつか文書とフリーソフトウェアを公開してます。 今回から数回は、セッション Bean からのデータベースアクセスについて書こうと思います。 EJB3.0 では、データベースへの永続化を行う際に Java Persistence Java 標準 O/R マッピング DBC +
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JPA (Java Persistence SQLite を使いたい!ということで試してみる。いちいちデータベースサーバとか用意したり起動したり面倒くさいし。 環境としてはjava -version Picked up _JAVA_OPTIONS: -Dfile.encoding=UTF-8 java version "1.6.0_20" Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065) Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode) $ mvn -v Picked up _JAVA_OPTIONS: -Dfile.encoding=UTF-8 Apache Maven
I am using resource local entitymanager with JPA 1 . What is the best practice for ityManager that is itymanager everytime.(Entitymanager not heavy weight but still boring ) itymanager for every thread and store it as ThreadLocal variable and use it (a-where should i close entitymanager b-Any entitystored in a session scoped bean will be a detached en
In 2014, we announced the retirement of our legacy forum, forum.spring.io, in favor of providing an improved community experience on stackoverflow.com. As part of that announcement, we put our forum into read-only mode, preserving forum posts that were referenced in various Spring issue trackers. On February 28, 2019, we plan to take the forum completely offline. In preparation for this end-of-lif
When professionalism comes in to play, so don’t miss it. As I wrote in post Why we need type-level injections in JavaEE, injecting EJB 3 stateful beans into servlet instance fields is not thread-safe. Along the same line, injecting EntityManager with @PersistenceConbles is not thread-safe, either. EntityManager is
I have a query factory that takes a column name as an attribute in order to search for that column. Right now I'm passing the name of the column as a string, so it's kind of hardcoded. If the name of the column changes in the entity's annotation, that "hidden dependency" breaks up. Is there a way in jpa to retrieve the real name of the column and have it available at compile time, so I can use it
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