Spring FrameworkのTransactionSynchronizationを試す

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data-publication-type="entry"> <div class="entry-inner"> <header class="entry-header"> <div class="date entry-date first"> <a href="https://kazuhira-r.hatenablog.com/archive/2023/06/04" rel="nofollow"> <time datetime="2023-06-04T14:12:00Z" title="2023-06-04T14:12:00Z"> 2023-06-04 </time> </a> </div> <h1 class="entry-title"> <a href="https://kazuhira-r.hatenablog.com/entry/2023/06/04/231200" class="entry-title-link bookmark">Spring FrameworkのTransactionSynchronizationを試す</a> </h1> <div class="entry-categories categories"> <a href="https://kazuhira-r.hatenablog.com/archive/category/Spring" class="entry-category-link category-Spring">Spring</a> </div> </header> <div class="entry-content hatenablog-entry"> <h4 id="これはなにをしたくて書いたもの">これは、なにをしたくて書いたもの？</h4> <a class="keyword" href="https://d.hatena.ne.jp/keyword/Spring%20Framework">Spring Framework</a>で、<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>の完了時に処理を行うことができるTransactionSynchronizationというものがあります。 存在は知っていたものの、ちゃんと使ったことがなかったので今回試してみることにしました。 <h4 id="TransactionSynchronization">TransactionSynchronization</h4> TransactionSynchronizationは、<a class="keyword" href="https://d.hatena.ne.jp/keyword/Spring%20Framework">Spring Framework</a>のドキュメントには登場しません。 <a href="https://docs.spring.io/spring-framework/reference/data-access/transaction.html">Transaction Management :: Spring Framework</a> <a class="keyword" href="https://d.hatena.ne.jp/keyword/Javadoc">Javadoc</a>を見ることになります。 <a href="https://docs.spring.io/spring-framework/docs/6.0.9/javadoc-api/org/springframework/transaction/support/TransactionSynchronization.html">TransactionSynchronization (Spring Framework 6.0.9 API)</a> TransactionSynchronizationを使うと、<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>の完了時になんらかの処理を行うことができます。 <blockquote>Interface for transaction synchronization callbacks.</blockquote> <code>TransactionSynchronization</code>インターフェースを実装して、以下の4種類のメソッドをオーバーライドします。 <ul> <li>beforeCommit(boolean readOnly) … <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>のコミット前に呼び出される <ul> <li><code>readOnly</code>は、読み取り専用の<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>かどうか</li> <li><code>RuntimeException</code>をスローすると、呼び出し元に伝播する（<code>TransactionException</code>のサブクラスをスローしてはいけない）</li> </ul> </li> <li>beforeCompletion … <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>のコミット／<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>の前に呼び出される <ul> <li><code>RuntimeException</code>をスローしても、呼び出し元に伝播しない（<code>TransactionException</code>のサブクラスをスローしてはいけない）</li> </ul> </li> <li>afterCommit … <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>のコミット後に呼び出される <ul> <li><code>RuntimeException</code>をスローすると、呼び出し元に伝播する（<code>TransactionException</code>のサブクラスをスローしてはいけない）</li> </ul> </li> <li>afterCompletion(int status) … <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>のコミット／<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>の後に呼び出される <ul> <li><code>status</code>は、定数定義（<code>STATUS_COMMITTED</code>、<code>STATUS_ROLLED_BACK</code>、<code>STATUS_UNKNOWN</code></li> <li><code>RuntimeException</code>をスローしても、呼び出し元に伝播しない（<code>TransactionException</code>のサブクラスをスローしてはいけない）</li> </ul> </li> </ul> <code>TransactionSynchronization</code>は、<code>TransactionSynchronizationManager#registerSynchronization</code>で登録して使います。 <a href="https://docs.spring.io/spring-framework/docs/6.0.9/javadoc-api/org/springframework/transaction/support/TransactionSynchronizationManager.html">TransactionSynchronizationManager (Spring Framework 6.0.9 API)</a> <code>TransactionSynchronization</code>は複数登録できます。その順序は、<code>getOrder</code>メソッドを実装していない場合は追加順になります。 説明はこんなところにして、実際に使ってみましょう。 <h4 id="環境">環境</h4> 今回の環境は、こちら。 <pre class="code shell" data-lang="shell" data-unlink>$ java --version openjdk 17.0.7 2023-04-18 OpenJDK Runtime Environment (build 17.0.7+7-Ubuntu-0ubuntu122.04.2) OpenJDK 64-Bit Server VM (build 17.0.7+7-Ubuntu-0ubuntu122.04.2, mixed mode, sharing) $ mvn --version Apache Maven 3.9.2 (c9616018c7a021c1c39be70fb2843d6f5f9b8a1c) Maven home: $HOME/.sdkman/candidates/maven/current Java version: 17.0.7, vendor: Private Build, runtime: /usr/lib/jvm/java-17-openjdk-amd64 Default locale: ja_JP, platform encoding: UTF-8 OS name: "linux", version: "5.15.0-73-generic", arch: "amd64", family: "unix"</pre> データベースには<a class="keyword" href="https://d.hatena.ne.jp/keyword/MySQL">MySQL</a>を用意しました。 <pre class="code shell" data-lang="shell" data-unlink> MySQL localhost:3306 ssl practice SQL > select version(); +-----------+ | version() | +-----------+ | 8.0.33 | +-----------+ 1 row in set (0.0370 sec)</pre> <a class="keyword" href="https://d.hatena.ne.jp/keyword/MySQL">MySQL</a>は172.17.0.2で動作しているものとし、データベースpractice、アカウントはkazuhira／passwordで接続できるものとします。 <h4 id="Spring-Bootプロジェクトを作成する">Spring Bootプロジェクトを作成する</h4> まずはSpring Bootプロジェクトを作成します。依存関係には、<code>web</code>、<code>jdbc</code>、<code>mysql</code>を追加。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s https://start.spring.io/starter.tgz \ -d bootVersion=3.1.0 \ -d javaVersion=17 \ -d type=maven-project \ -d name=transaction-synchronization-example \ -d groupId=org.littlewings \ -d artifactId=transaction-synchronization-example \ -d version=0.0.1-SNAPSHOT \ -d packageName=org.littlewings.spring.tx \ -d dependencies=web,jdbc,mysql \ -d baseDir=transaction-synchronization-example | tar zxvf -</pre> <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C7%A5%A3%A5%EC%A5%AF%A5%C8">ディレクト</a>リ内に移動。 <pre class="code shell" data-lang="shell" data-unlink>$ cd transaction-synchronization-example</pre> 生成された<a class="keyword" href="https://d.hatena.ne.jp/keyword/Maven">Maven</a>依存関係など。 <pre class="code lang-xml" data-lang="xml" data-unlink> <properties> <java.version>17</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.mysql</groupId> <artifactId>mysql-connector-j</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </pre> 自動生成された<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%BD%A1%BC%A5%B9%A5%B3%A1%BC%A5%C9">ソースコード</a>は削除しておきます。 <pre class="code shell" data-lang="shell" data-unlink>$ rm src/main/java/org/littlewings/spring/tx/TransactionSynchronizationExampleApplication.java src/test/java/org/littlewings/spring/tx/TransactionSynchronizationExampleApplicationTests.java</pre> テーブル定義。お題は書籍にしました。 <code>src/main/resources/schema.sql</code> <pre class="code lang-java" data-lang="java" data-unlink>drop table if exists book; create table book( isbn varchar(14), title varchar(100), price int, primary key(isbn) ); </pre> この<a class="keyword" href="https://d.hatena.ne.jp/keyword/SQL">SQL</a>は、アプリケーション起動時に毎回実行されるように設定。 <code>src/main/resources/application.properties</code> <pre class="code lang-jproperties" data-lang="jproperties" data-unlink>spring.datasource.url=jdbc:mysql://172.17.0.2:3306/practice?characterEncoding=utf-8&connectionCollation=utf8mb4_0900_bin spring.datasource.username=kazuhira spring.datasource.password=password spring.sql.init.mode=always </pre> エンティティ相当のクラス。 <code>src/main/java/org/littlewings/spring/tx/Book.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; public class Book { String isbn; String title; Integer price; public static Book create(String isbn, String title, Integer price) { Book book = new Book(); book.setIsbn(isbn); book.setTitle(title); book.setPrice(price); return book; } // getter／setterは省略 } </pre> <code>TransactionSynchronization</code>を使ったServiceクラス。 <code>src/main/java/org/littlewings/spring/tx/BookService.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource; import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import org.springframework.transaction.support.TransactionSynchronization; import org.springframework.transaction.support.TransactionSynchronizationManager; import java.util.List; import java.util.Map; @Transactional @Service public class BookService { NamedParameterJdbcTemplate jdbcTemplate; LoggingService loggingService; public BookService(NamedParameterJdbcTemplate jdbcTemplate, LoggingService loggingService) { this.jdbcTemplate = jdbcTemplate; this.loggingService = loggingService; } public Book findByIsbn(String isbn) { return jdbcTemplate.queryForObject(""" select isbn, title, price from book where isbn = :isbn""", Map.of("isbn", isbn), new BeanPropertyRowMapper<>(Book.class)); } public List<Book> findAll() { return jdbcTemplate.query(""" select isbn, title, price from book order by price asc""", new BeanPropertyRowMapper<>(Book.class)); } public void insertAfterCommit(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { loggingService.log("after commit"); } }); } public void insertAfterCommitRollback(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { loggingService.log("after commit"); } }); throw new RuntimeException("Oops!!"); } public void insertAfterCommitThrowException(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { throw new RuntimeException("Oops!!, after commit"); } }); } public void insertAfterCompletion(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCompletion(int status) { loggingService.log("after completion, status = " + status); } }); } public void insertAfterCompletionRollback(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCompletion(int status) { loggingService.log("after completion, status = " + status); } }); throw new RuntimeException("Oops!!"); } public void insertAfterCompletionThrowException(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCompletion(int status) { throw new RuntimeException("Oops!!, after completion, status = " + status); } }); } } </pre> 今回は、クラス自体に<code>@Transactional</code><a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A2%A5%CE%A5%C6%A1%BC%A5%B7%A5%E7%A5%F3">アノテーション</a>を付与しています。 <pre class="code lang-java" data-lang="java" data-unlink>@Transactional @Service public class BookService { </pre> <code>TransactionSynchronization</code>は、こんな感じで<code>TransactionSynchronization</code>クラスを継承したクラスを作成し、処理を行いたいタイミングに 応じたメソッドをオーバーライドします。そして、<code>TransactionSynchronizationManager#registerSynchronization</code>で登録します。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCommit(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { loggingService.log("after commit"); } }); } </pre> <code>TransactionSynchronization</code>の部分は、また後で説明します。 メソッド内で呼び出しているServiceクラスは、こんな感じのものです。 <code>src/main/java/org/littlewings/spring/tx/LoggingService.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Service; @Service public class LoggingService { Logger logger = LoggerFactory.getLogger(LoggingService.class); public void log(String message) { logger.info(message); } } </pre> RestController。 <code>src/main/java/org/littlewings/spring/tx/BookController.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; import org.springframework.http.MediaType; import org.springframework.http.ResponseEntity; import org.springframework.web.bind.annotation.*; import org.springframework.web.util.UriComponentsBuilder; import java.util.List; @RestController @RequestMapping("books") public class BookController { BookService bookService; public BookController(BookService bookService) { this.bookService = bookService; } @GetMapping(value = "{isbn}", produces = MediaType.APPLICATION_JSON_VALUE) public Book findByIsbn(@PathVariable String isbn) { return bookService.findByIsbn(isbn); } @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE) public List<Book> findAll() { return bookService.findAll(); } @PostMapping(value = "after-commit", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCommit(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCommit(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-commit-rollback", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCommitRollback(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCommitRollback(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-commit-throw", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCommitThrowException(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCommitThrowException(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-completion", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCompletion(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCompletion(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-completion-rollback", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCompletionRollback(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCompletionRollback(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-completion-throw", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCompletionThrowException(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCompletionThrowException(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } } </pre> <code>main</code>メソッドを定義したクラス。 <code>src/main/java/org/littlewings/spring/tx/App.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class App { public static void main(String... args) { SpringApplication.run(App.class, args); } } </pre> ここまでで、準備は完了です。 <h4 id="動かしてみる">動かしてみる</h4> では、アプリケーションをパッケージングして起動します。 <pre class="code shell" data-lang="shell" data-unlink>$ mvn package $ java -jar target/transaction-synchronization-example-0.0.1-SNAPSHOT.jar</pre> データを登録するのは、以下の4つのエンドポイントがありました。 <pre class="code lang-java" data-lang="java" data-unlink> @PostMapping(value = "after-commit", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCommit(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCommit(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-commit-rollback", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCommitRollback(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCommitRollback(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-commit-throw", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCommitThrowException(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCommitThrowException(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-completion", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCompletion(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCompletion(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-completion-rollback", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCompletionRollback(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCompletionRollback(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } @PostMapping(value = "after-completion-throw", consumes = MediaType.APPLICATION_JSON_VALUE) public ResponseEntity<Void> registerAfterCompletionThrowException(@RequestBody Book book, UriComponentsBuilder uriComponentsBuilder) { bookService.insertAfterCompletionThrowException(book); return ResponseEntity.created(uriComponentsBuilder.path("books/{isbn}").build(book.getIsbn())).build(); } </pre> これらを、それぞれ対応する（<code>TransactionSynchronization</code>を使った）Serviceクラスのメソッドと合わせて見ていきます。 まずは<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>のコミット後に動作する<code>TransactionSynchronization#afterCommit</code>から。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCommit(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { loggingService.log("after commit"); } }); } </pre> リク<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A8%A5%B9">エス</a>トを送信。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -i -XPOST -H 'Content-Type: application/json' localhost:8080/books/after-commit -d '{"isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400}' HTTP/1.1 201 Location: http://localhost:8080/books/978-4621303252 Content-Length: 0 Date: Sun, 04 Jun 2023 13:13:46 GMT </pre> アプリケーション側には、ログが出力されます。これはコミット後に動作したことになります。 <pre class="code shell" data-lang="shell" data-unlink>2023-06-04T22:13:46.844+09:00 INFO 22000 --- [nio-8080-exec-1] o.littlewings.spring.tx.LoggingService : after commit</pre> データも入りました。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s localhost:8080/books | jq [ { "isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400 } ]</pre> 次は、<code>TransactionSynchronization#afterCommit</code>を使いつつ、例外をスローして<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>させてみましょう。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCommitRollback(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { loggingService.log("after commit"); } }); throw new RuntimeException("Oops!!"); } </pre> リク<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A8%A5%B9">エス</a>トを送信。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -i -XPOST -H 'Content-Type: application/json' localhost:8080/books/after-commit-rollback -d '{"isbn": "978-4297126858", "title": "プロになるJava―仕事で必要なプログラミングの知識がゼロから身につく最高の指南書", "price": 3278}' HTTP/1.1 500 Content-Type: application/json Transfer-Encoding: chunked Date: Sun, 04 Jun 2023 13:14:10 GMT Connection: close {"timestamp":"2023-06-04T13:14:10.905+00:00","status":500,"error":"Internal Server Error","path":"/books/after-commit-rollback"}</pre> エラーになりました。 <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%B9%A5%BF%A5%C3%A5%AF%A5%C8%A5%EC%A1%BC%A5%B9">スタックトレース</a>。 <pre class="code shell" data-lang="shell" data-unlink>2023-06-04T22:14:10.893+09:00 ERROR 22000 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: java.lang.RuntimeException: Oops!!] with root cause java.lang.RuntimeException: Oops!! at org.littlewings.spring.tx.BookService.insertAfterCommitRollback(BookService.java:76) ~[classes!/:0.0.1-SNAPSHOT] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:391) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:702) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.littlewings.spring.tx.BookService$$SpringCGLIB$$0.insertAfterCommitRollback(<generated>) ~[classes!/:0.0.1-SNAPSHOT] at org.littlewings.spring.tx.BookController.registerAfterCommitRollback(BookController.java:38) ~[classes!/:0.0.1-SNAPSHOT] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:207) ~[spring-web-6.0.9.jar!/:6.0.9] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:152) ~[spring-web-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974) ~[spring-webmvc-6.0.9.jar!/:6.0.9] 〜省略〜</pre> <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>されているので、以下の箇所に相当するログは出力されていません。 <pre class="code lang-java" data-lang="java" data-unlink> TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { loggingService.log("after commit"); } }); </pre> データも増えていませんね。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s localhost:8080/books | jq [ { "isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400 } ]</pre> <code>TransactionSynchronization#afterCommit</code>から例外を投げてみます。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCommitThrowException(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { throw new RuntimeException("Oops!!, after commit"); } }); } </pre> リク<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A8%A5%B9">エス</a>ト送信。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -i -XPOST -H 'Content-Type: application/json' localhost:8080/books/after-commit-throw -d '{"isbn": "978-4798161488", "title": "MySQL徹底入門第4版 MySQL 8.0対応", "price": 4180}' HTTP/1.1 500 Content-Type: application/json Transfer-Encoding: chunked Date: Sun, 04 Jun 2023 13:16:45 GMT Connection: close {"timestamp":"2023-06-04T13:16:45.006+00:00","status":500,"error":"Internal Server Error","path":"/books/after-commit-throw"}</pre> エラーになりました。 この時の<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%B9%A5%BF%A5%C3%A5%AF%A5%C8%A5%EC%A1%BC%A5%B9">スタックトレース</a>。 <pre class="code shell" data-lang="shell" data-unlink>2023-06-04T22:16:45.003+09:00 ERROR 22000 --- [nio-8080-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: java.lang.RuntimeException: Oops!!, after commit] with root cause java.lang.RuntimeException: Oops!!, after commit at org.littlewings.spring.tx.BookService$3.afterCommit(BookService.java:88) ~[classes!/:0.0.1-SNAPSHOT] at org.springframework.transaction.support.TransactionSynchronizationUtils.invokeAfterCommit(TransactionSynchronizationUtils.java:135) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerAfterCommit(TransactionSynchronizationUtils.java:123) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerAfterCommit(AbstractPlatformTransactionManager.java:936) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:782) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:660) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:410) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:702) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.littlewings.spring.tx.BookService$$SpringCGLIB$$0.insertAfterCommitThrowException(<generated>) ~[classes!/:0.0.1-SNAPSHOT] at org.littlewings.spring.tx.BookController.registerAfterCommitThrowException(BookController.java:45) ~[classes!/:0.0.1-SNAPSHOT] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:207) ~[spring-web-6.0.9.jar!/:6.0.9] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:152) ~[spring-web-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974) ~[spring-webmvc-6.0.9.jar!/:6.0.9] 〜省略〜</pre> 今回は<code>TransactionSynchronization#afterCommit</code>内から例外をスローしたわけですが。 <pre class="code lang-java" data-lang="java" data-unlink> TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCommit() { throw new RuntimeException("Oops!!, after commit"); } }); </pre> <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%B9%A5%BF%A5%C3%A5%AF%A5%C8%A5%EC%A1%BC%A5%B9">スタックトレース</a>を見ると、この<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>境界のメソッドから例外がスローされたことになっていますね。 <pre class="code shell" data-lang="shell" data-unlink> at org.littlewings.spring.tx.BookService$$SpringCGLIB$$0.insertAfterCommitThrowException(<generated>) ~[classes!/:0.0.1-SNAPSHOT] at org.littlewings.spring.tx.BookController.registerAfterCommitThrowException(BookController.java:38) ~[classes!/:0.0.1-SNAPSHOT]</pre> これが、呼び出し元に伝播するということですね。 一方で、この処理はコミット後に動作しているので、例外を投げても<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>されません。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s localhost:8080/books | jq [ { "isbn": "978-4798161488", "title": "MySQL徹底入門第4版 MySQL 8.0対応", "price": 4180 }, { "isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400 } ]</pre> <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>の完了後に動作する<code>TransactionSynchronization#afterCompletion</code>。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCompletion(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCompletion(int status) { loggingService.log("after completion, status = " + status); } }); } </pre> リク<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A8%A5%B9">エス</a>トを送信。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -i -XPOST -H 'Content-Type: application/json' localhost:8080/books/after-completion -d '{"isbn": "978-4297124298", "title": "Spring Framework超入門〜やさしくわかるWebアプリ開発", "price": 3058}' HTTP/1.1 201 Location: http://localhost:8080/books/978-4297124298 Content-Length: 0 Date: Sun, 04 Jun 2023 13:19:16 GMT </pre> こちらも、ログが出力されました。 <pre class="code shell" data-lang="shell" data-unlink>2023-06-04T22:19:16.678+09:00 INFO 22000 --- [nio-8080-exec-7] o.littlewings.spring.tx.LoggingService : after completion, status = 0</pre> <code>0</code>というのは、<code>TransactionSynchronization#STATUS_COMMITTED</code>の値ですね。 データも追加されました。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s localhost:8080/books | jq [ { "isbn": "978-4297124298", "title": "Spring Framework超入門〜やさしくわかるWebアプリ開発", "price": 3058 }, { "isbn": "978-4798161488", "title": "MySQL徹底入門第4版 MySQL 8.0対応", "price": 4180 }, { "isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400 } ]</pre> <code>TransactionSynchronization#afterCompletion</code>を使いつつ、例外をスローしてみます。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCompletionRollback(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCompletion(int status) { loggingService.log("after completion, status = " + status); } }); throw new RuntimeException("Oops!!"); } </pre> リク<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A8%A5%B9">エス</a>トを送信。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -i -XPOST -H 'Content-Type: application/json' localhost:8080/books/after-completion-rollback -d '{"isbn": "978-4774189093", "title": "Java本格入門～モダンスタイルによる基礎からオブジェクト指向・実用ライブラリまで", "price": 3278}' HTTP/1.1 500 Content-Type: application/json Transfer-Encoding: chunked Date: Sun, 04 Jun 2023 13:21:11 GMT Connection: close {"timestamp":"2023-06-04T13:21:11.856+00:00","status":500,"error":"Internal Server Error","path":"/books/after-completion-rollback"}</pre> エラーになりました。 この時のログと<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%B9%A5%BF%A5%C3%A5%AF%A5%C8%A5%EC%A1%BC%A5%B9">スタックトレース</a>。 <pre class="code shell" data-lang="shell" data-unlink>2023-06-04T22:21:11.853+09:00 INFO 22000 --- [io-8080-exec-10] o.littlewings.spring.tx.LoggingService : after completion, status = 1 2023-06-04T22:21:11.854+09:00 ERROR 22000 --- [io-8080-exec-10] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: java.lang.RuntimeException: Oops!!] with root cause java.lang.RuntimeException: Oops!! at org.littlewings.spring.tx.BookService.insertAfterCompletionRollback(BookService.java:120) ~[classes!/:0.0.1-SNAPSHOT] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:391) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:702) ~[spring-aop-6.0.9.jar!/:6.0.9] at org.littlewings.spring.tx.BookService$$SpringCGLIB$$0.insertAfterCompletionRollback(<generated>) ~[classes!/:0.0.1-SNAPSHOT] at org.littlewings.spring.tx.BookController.registerAfterCompletionRollback(BookController.java:59) ~[classes!/:0.0.1-SNAPSHOT] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:207) ~[spring-web-6.0.9.jar!/:6.0.9] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:152) ~[spring-web-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081) ~[spring-webmvc-6.0.9.jar!/:6.0.9] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974) ~[spring-webmvc-6.0.9.jar!/:6.0.9] 〜省略〜</pre> ポイントは、<code>TransactionSynchronization#afterCompletion</code>は<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>時も呼び出されるので、以下のログが出力されていることです。 <pre class="code shell" data-lang="shell" data-unlink>2023-06-04T22:21:11.853+09:00 INFO 22000 --- [io-8080-exec-10] o.littlewings.spring.tx.LoggingService : after completion, status = 1</pre> <code>0</code>というのは、<code>TransactionSynchronization#STATUS_ROLLED_BACK</code>の値ですね。 <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>されているので、データは増えていません。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s localhost:8080/books | jq [ { "isbn": "978-4297124298", "title": "Spring Framework超入門〜やさしくわかるWebアプリ開発", "price": 3058 }, { "isbn": "978-4798161488", "title": "MySQL徹底入門第4版 MySQL 8.0対応", "price": 4180 }, { "isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400 } ]</pre> 最後は、<code>TransactionSynchronization#afterCompletion</code>内から例外をスローしてみます。 <pre class="code lang-java" data-lang="java" data-unlink> public void insertAfterCompletionThrowException(Book book) { jdbcTemplate.update(""" insert into book(isbn, title, price) values(:isbn, :title, :price)""", new BeanPropertySqlParameterSource(book)); TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() { @Override public void afterCompletion(int status) { throw new RuntimeException("Oops!!, after completion, status = " + status); } }); } </pre> リク<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%A8%A5%B9">エス</a>トを送信。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -i -XPOST -H 'Content-Type: application/json' localhost:8080/books/after-completion-throw -d '{"isbn": "978-4297131425", "title": "実践Redis入門技術の仕組みから現場の活用まで", "price": 4180}' HTTP/1.1 201 Location: http://localhost:8080/books/978-4297131425 Content-Length: 0 Date: Sun, 04 Jun 2023 13:30:19 GMT </pre> ふつうに処理が終了しました。 この時、アプリケーション側には<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%B9%A5%BF%A5%C3%A5%AF%A5%C8%A5%EC%A1%BC%A5%B9">スタックトレース</a>もなにも出力されていませんでした。 データはしっかり増えています。 <pre class="code shell" data-lang="shell" data-unlink>$ curl -s localhost:8080/books | jq [ { "isbn": "978-4297124298", "title": "Spring Framework超入門〜やさしくわかるWebアプリ開発", "price": 3058 }, { "isbn": "978-4297131425", "title": "実践Redis入門技術の仕組みから現場の活用まで", "price": 4180 }, { "isbn": "978-4798161488", "title": "MySQL徹底入門第4版 MySQL 8.0対応", "price": 4180 }, { "isbn": "978-4621303252", "title": "Effective Java 第3版", "price": 4400 } ]</pre> これで、<code>TransactionSynchronization#afterCompletion</code>内で例外をスローしても呼び出し元に影響しない（伝播しない）ことが 確認できました。 <h4 id="TestTransactionを使ってテストで確認する">TestTransactionを使ってテストで確認する</h4> ところで、<code>TransactionSynchronization</code>は時には便利な機能ですが、<code>TransactionSynchronizationManager</code>に登録した <code>TransactionSynchronization</code>が動作していることを確認するにはどうしたらいいのでしょうか？ <code>TestTransaction</code>を使うのが良さそうです。 <a href="https://docs.spring.io/spring-framework/reference/testing/testcontext-framework/tx.html#testcontext-tx-programmatic-tx-mgt">Transaction Management / Programmatic Transaction Management</a> <code>TestTransaction</code>を使うと、テストで使われている<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>のコミット、<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>をメソッド呼び出しで制御することが できます。 <blockquote>For example, you can use TestTransaction within test methods, before methods, and after methods to start or end the current test-managed transaction or to configure the current test-managed transaction for rollback or commit.</blockquote> <a href="https://docs.spring.io/spring-framework/docs/6.0.9/javadoc-api/org/springframework/test/context/transaction/TestTransaction.html">TestTransaction (Spring Framework 6.0.9 API)</a> 作成したテストは、こんな感じです。 <code>src/test/java/org/littlewings/spring/tx/BookServiceTest.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.boot.test.mock.mockito.MockBean; import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate; import org.springframework.test.annotation.DirtiesContext; import org.springframework.test.context.transaction.TestTransaction; import org.springframework.transaction.annotation.Transactional; import org.springframework.transaction.support.TransactionSynchronization; import java.util.Collections; import java.util.List; import static org.assertj.core.api.Assertions.assertThat; import static org.assertj.core.api.Assertions.assertThatThrownBy; import static org.mockito.Mockito.*; @DirtiesContext @SpringBootTest class BookServiceTest { @Autowired BookService bookService; @MockBean LoggingService loggingService; @Autowired NamedParameterJdbcTemplate jdbcTemplate; @BeforeEach void setUp() { reset(loggingService); jdbcTemplate.update("truncate table book", Collections.emptyMap()); } @Transactional @Test void query() { bookService.insertAfterCommit(Book.create("978-4621303252", "Effective Java 第3版", 4400)); bookService.insertAfterCommit(Book.create("978-4798161488", "MySQL徹底入門第4版 MySQL 8.0対応", 4180)); Book javaBook = bookService.findByIsbn("978-4621303252"); assertThat(javaBook.getIsbn()).isEqualTo("978-4621303252"); assertThat(javaBook.getTitle()).isEqualTo("Effective Java 第3版"); assertThat(javaBook.getPrice()).isEqualTo(4400); List<Book> books = bookService.findAll(); assertThat(books).hasSize(2); assertThat(books.get(0).getTitle()).isEqualTo("MySQL徹底入門第4版 MySQL 8.0対応"); assertThat(books.get(1).getTitle()).isEqualTo("Effective Java 第3版"); } @Transactional @Test void insertAfterCommitWithCommit() { doNothing().when(loggingService).log("after commit"); bookService.insertAfterCommit(Book.create("978-4621303252", "Effective Java 第3版", 4400)); TestTransaction.flagForCommit(); TestTransaction.end(); verify(loggingService, times(1)) .log("after commit"); } @Transactional @Test void insertAfterCommitWithRollback() { bookService.insertAfterCommit(Book.create("978-4621303252", "Effective Java 第3版", 4400)); TestTransaction.flagForRollback(); TestTransaction.end(); verify(loggingService, never()) .log(anyString()); } @Transactional @Test void insertAfterCommitWithThrowExceptionRollback() { assertThatThrownBy(() -> bookService.insertAfterCommitRollback(Book.create("978-4297126858", "プロになるJava―仕事で必要なプログラミングの知識がゼロから身につく最高の指南書", 3278))) .isExactlyInstanceOf(RuntimeException.class) .hasMessage("Oops!!"); verify(loggingService, never()) .log(anyString()); } @Transactional @Test void insertAfterCommitThrowExceptionWithCommit() { bookService.insertAfterCommitThrowException(Book.create("978-4798161488", "MySQL徹底入門第4版 MySQL 8.0対応", 4180)); TestTransaction.flagForCommit(); assertThatThrownBy(() -> TestTransaction.end()) .isExactlyInstanceOf(RuntimeException.class) .hasMessage("Oops!!, after commit"); verify(loggingService, never()) .log(anyString()); } @Transactional @Test void insertAfterCommitThrowExceptionWithRollback() { bookService.insertAfterCommitThrowException(Book.create("978-4798161488", "MySQL徹底入門第4版 MySQL 8.0対応", 4180)); TestTransaction.flagForRollback(); TestTransaction.end(); } @Transactional @Test void insertAfterCompletionWithCommit() { doNothing().when(loggingService).log("after completion, status = 0"); bookService.insertAfterCompletion(Book.create("978-4297124298", "Spring Framework超入門〜やさしくわかるWebアプリ開発", 3058)); TestTransaction.flagForCommit(); TestTransaction.end(); verify(loggingService, times(1)) .log("after completion, status = 0"); } @Transactional @Test void insertAfterCompletionWithRollback() { doNothing().when(loggingService).log("after completion, status = 1"); bookService.insertAfterCompletion(Book.create("978-4774189093", "Java本格入門～モダンスタイルによる基礎からオブジェクト指向・実用ライブラリまで", 3278)); TestTransaction.flagForRollback(); TestTransaction.end(); verify(loggingService, times(1)) .log("after completion, status = 1"); } @Transactional @Test void insertAfterCompletionThrowExceptionRollback() { doNothing().when(loggingService).log("after completion, status = 1"); assertThatThrownBy(() -> bookService.insertAfterCompletionRollback(Book.create("978-4774189093", "Java本格入門～モダンスタイルによる基礎からオブジェクト指向・実用ライブラリまで", 3278))); verify(loggingService, times(1)) .log("after completion, status = 1"); } @Transactional @Test void insertAfterCompletionThrowExceptionWithCommit() { bookService.insertAfterCompletionThrowException(Book.create("978-4297131425", "実践Redis入門技術の仕組みから現場の活用まで", 4180)); TestTransaction.flagForCommit(); TestTransaction.end(); } @Test void transactionCompletionStatus() { assertThat(TransactionSynchronization.STATUS_COMMITTED).isEqualTo(0); assertThat(TransactionSynchronization.STATUS_ROLLED_BACK).isEqualTo(1); assertThat(TransactionSynchronization.STATUS_UNKNOWN).isEqualTo(2); } } </pre> 少し、ピックアップして見てみましょう。 <code>TransactionSynchronization#afterCommit</code>でコミットさせる場合。<code>TestTransaction#flagForCommit</code>を呼び出して<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>の コミット用のフラグを立てて、<code>TestTransaction#end</code>で確定します。 <pre class="code lang-java" data-lang="java" data-unlink> @Transactional @Test void insertAfterCommitWithCommit() { doNothing().when(loggingService).log("after commit"); bookService.insertAfterCommit(Book.create("978-4621303252", "Effective Java 第3版", 4400)); TestTransaction.flagForCommit(); TestTransaction.end(); verify(loggingService, times(1)) .log("after commit"); } </pre> 実際に呼び出されているかどうかの確認は、モックを使いました。 なお、「コミット用のフラグを立てて」と言っているように、このテストで実行した<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>はコミットされます。 <code>@Transactional</code>を付けているからといって<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>されなくなるので、その点には注意が必要です。 なお、<code>TestTransaction</code>を使うには<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%C8%A5%E9%A5%F3%A5%B6%A5%AF%A5%B7%A5%E7%A5%F3">トランザクション</a>を開始しておく必要があるようです。このテストから<code>@Transactional</code>を削除すると テストが実行できなくなります。 <a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>させるには、<code>TestTransaction#flagForRollback</code>を呼び出して<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>用のフラグを立てます。 <pre class="code" data-lang="" data-unlink> @Transactional @Test void insertAfterCommitWithRollback() { bookService.insertAfterCommit(Book.create("978-4621303252", "Effective Java 第3版", 4400)); TestTransaction.flagForRollback(); TestTransaction.end(); verify(loggingService, never()) .log(anyString()); }</pre> <code>TestTransaction#end</code>で確定させても、<code>TransactionSynchronization#afterCommit</code>の処理が呼び出されないことが確認できます。 <code>TransactionSynchronization#afterCommit</code>内で例外をスローした場合は、<code>TestTransaction#end</code>を呼び出した時に例外がスローされます。 <pre class="code lang-java" data-lang="java" data-unlink> @Transactional @Test void insertAfterCommitThrowExceptionWithCommit() { bookService.insertAfterCommitThrowException(Book.create("978-4798161488", "MySQL徹底入門第4版 MySQL 8.0対応", 4180)); TestTransaction.flagForCommit(); assertThatThrownBy(() -> TestTransaction.end()) .isExactlyInstanceOf(RuntimeException.class) .hasMessage("Oops!!, after commit"); verify(loggingService, never()) .log(anyString()); } </pre> <code>TransactionSynchronization#afterCompletion</code>の場合は、コミットしても<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%ED%A1%BC%A5%EB%A5%D0%A5%C3%A5%AF">ロールバック</a>しても処理が呼び出されます。 <pre class="code lang-java" data-lang="java" data-unlink> @Transactional @Test void insertAfterCompletionWithCommit() { doNothing().when(loggingService).log("after completion, status = 0"); bookService.insertAfterCompletion(Book.create("978-4297124298", "Spring Framework超入門〜やさしくわかるWebアプリ開発", 3058)); TestTransaction.flagForCommit(); TestTransaction.end(); verify(loggingService, times(1)) .log("after completion, status = 0"); } @Transactional @Test void insertAfterCompletionWithRollback() { doNothing().when(loggingService).log("after completion, status = 1"); bookService.insertAfterCompletion(Book.create("978-4774189093", "Java本格入門～モダンスタイルによる基礎からオブジェクト指向・実用ライブラリまで", 3278)); TestTransaction.flagForRollback(); TestTransaction.end(); verify(loggingService, times(1)) .log("after completion, status = 1"); } </pre> ステータスとして渡ってくる値が変わりますね。 そして、<code>TransactionSynchronization#afterCompletion</code>内で例外をスローしても、コミット時に例外は呼び出し元に伝播しません。 <pre class="code lang-java" data-lang="java" data-unlink> @Transactional @Test void insertAfterCompletionThrowExceptionWithCommit() { bookService.insertAfterCompletionThrowException(Book.create("978-4297131425", "実践Redis入門技術の仕組みから現場の活用まで", 4180)); TestTransaction.flagForCommit(); TestTransaction.end(); } </pre> やや脱線していますが、<code>TransactionSynchronization</code>のステータス値の確認も。 <pre class="code lang-java" data-lang="java" data-unlink> @Test void transactionCompletionStatus() { assertThat(TransactionSynchronization.STATUS_COMMITTED).isEqualTo(0); assertThat(TransactionSynchronization.STATUS_ROLLED_BACK).isEqualTo(1); assertThat(TransactionSynchronization.STATUS_UNKNOWN).isEqualTo(2); } </pre> <h4 id="実装を見る">実装を見る</h4> 先程の動作確認時の<a class="keyword" href="https://d.hatena.ne.jp/keyword/%A5%B9%A5%BF%A5%C3%A5%AF%A5%C8%A5%EC%A1%BC%A5%B9">スタックトレース</a>を見るとわかりますが、<code>TransactionSynchronization</code>を呼び出している処理はこのあたりですね。 <a href="https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/AbstractPlatformTransactionManager.java#L720-L786">https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/AbstractPlatformTransactionManager.java#L720-L786</a> 実際に呼び出しを行うのは<code>TransactionSynchronizationUtils</code>ですね。 <a href="https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java">https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java</a> また、<code>TransactionSynchronization#beforeCompletion</code>や<code>TransactionSynchronization#afterCompletion</code>で例外がスローされても 呼び出し元に伝播しないのは、ふつうに<code>try</code>〜<code>catch</code>しているからですね。 <a href="https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java#L105-L114">https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java#L105-L114</a> <a href="https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java#L166-L179">https://github.com/spring-projects/spring-framework/blob/v6.0.9/spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java#L166-L179</a> <h4 id="オマケRestControllerのテストを書く">オマケ：RestControllerのテストを書く</h4> 最後に、RestControllerのテストも書いておいたので載せておきます。<code>curl</code>で実行していた内容を確認しています。 ※データが増えていないことの確認まではしていませんが <code>src/test/java/org/littlewings/spring/tx/BookControllerTest.java</code> <pre class="code lang-java" data-lang="java" data-unlink>package org.littlewings.spring.tx; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.boot.test.web.client.TestRestTemplate; import org.springframework.boot.test.web.server.LocalServerPort; import org.springframework.core.ParameterizedTypeReference; import org.springframework.http.HttpEntity; import org.springframework.http.HttpMethod; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate; import java.net.URI; import java.util.Collections; import java.util.Map; import static org.assertj.core.api.Assertions.assertThat; import static org.assertj.core.api.Assertions.entry; @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT) class BookControllerTest { @Autowired TestRestTemplate restTemplate; @LocalServerPort int port; @Autowired NamedParameterJdbcTemplate jdbcTemplate; @BeforeEach void setUp() { jdbcTemplate.update("truncate table book", Collections.emptyMap()); } @Test void insertAfterCommit() { ResponseEntity<Void> response = restTemplate.postForEntity( "/books/after-commit", new HttpEntity<>(Book.create("978-4621303252", "Effective Java 第3版", 4400)), Void.class ); assertThat(response.getStatusCode()).isEqualTo(HttpStatus.CREATED); assertThat(response.getHeaders().getLocation()).isEqualTo(URI.create(String.format("http://localhost:%d/books/978-4621303252", port))); Book book = restTemplate.getForObject("/books/978-4621303252", Book.class); assertThat(book.getIsbn()).isEqualTo("978-4621303252"); assertThat(book.getTitle()).isEqualTo("Effective Java 第3版"); assertThat(book.getPrice()).isEqualTo(4400); } @Test void insertAfterCommitRollback() { ResponseEntity<Map<String, Object>> response = restTemplate.exchange( "/books/after-commit-rollback", HttpMethod.POST, new HttpEntity<>(Book.create("978-4297126858", "プロになるJava―仕事で必要なプログラミングの知識がゼロから身につく最高の指南書", 3278)), new ParameterizedTypeReference<>() { } ); assertThat(response.getStatusCode()).isEqualTo(HttpStatus.INTERNAL_SERVER_ERROR); assertThat(response.getBody()) .containsOnlyKeys("timestamp", "status", "error", "path") .contains(entry("status", 500), entry("error", "Internal Server Error"), entry("path", "/books/after-commit-rollback")); Book book = restTemplate.getForObject("/books/978-4297126858", Book.class); assertThat(book.getIsbn()).isNull(); assertThat(book.getTitle()).isNull(); assertThat(book.getPrice()).isNull(); } @Test void insertAfterCommitThrowException() { ResponseEntity<Map<String, Object>> response = restTemplate.exchange( "/books/after-commit-throw", HttpMethod.POST, new HttpEntity<>(Book.create("978-4798161488", "MySQL徹底入門第4版 MySQL 8.0対応", 4180)), new ParameterizedTypeReference<>() { } ); assertThat(response.getStatusCode()).isEqualTo(HttpStatus.INTERNAL_SERVER_ERROR); assertThat(response.getBody()) .containsOnlyKeys("timestamp", "status", "error", "path") .contains(entry("status", 500), entry("error", "Internal Server Error"), entry("path", "/books/after-commit-throw")); Book book = restTemplate.getForObject("/books/978-4798161488", Book.class); assertThat(book.getIsbn()).isEqualTo("978-4798161488"); assertThat(book.getTitle()).isEqualTo("MySQL徹底入門第4版 MySQL 8.0対応"); assertThat(book.getPrice()).isEqualTo(4180); } @Test void insertAfterCompletion() { ResponseEntity<Void> response = restTemplate.postForEntity( "/books/after-completion", new HttpEntity<>(Book.create("978-4297124298", "Spring Framework超入門〜やさしくわかるWebアプリ開発", 3058)), Void.class ); assertThat(response.getStatusCode()).isEqualTo(HttpStatus.CREATED); assertThat(response.getHeaders().getLocation()).isEqualTo(URI.create(String.format("http://localhost:%d/books/978-4297124298", port))); Book book = restTemplate.getForObject("/books/978-4297124298", Book.class); assertThat(book.getIsbn()).isEqualTo("978-4297124298"); assertThat(book.getTitle()).isEqualTo("Spring Framework超入門〜やさしくわかるWebアプリ開発"); assertThat(book.getPrice()).isEqualTo(3058); } @Test void insertAfterCompletionRollback() { ResponseEntity<Map<String, Object>> response = restTemplate.exchange( "/books/after-completion-rollback", HttpMethod.POST, new HttpEntity<>(Book.create("978-4774189093", "Java本格入門～モダンスタイルによる基礎からオブジェクト指向・実用ライブラリまで", 3278)), new ParameterizedTypeReference<>() { } ); assertThat(response.getStatusCode()).isEqualTo(HttpStatus.INTERNAL_SERVER_ERROR); assertThat(response.getBody()) .containsOnlyKeys("timestamp", "status", "error", "path") .contains(entry("status", 500), entry("error", "Internal Server Error"), entry("path", "/books/after-commit-throw")); Book book = restTemplate.getForObject("/books/978-4774189093", Book.class); assertThat(book.getIsbn()).isNull(); assertThat(book.getTitle()).isNull(); assertThat(book.getPrice()).isNull(); } @Test void insertAfterCompletionThrowException() { ResponseEntity<Map<String, Object>> response = restTemplate.exchange( "/books/after-completion-throw", HttpMethod.POST, new HttpEntity<>(Book.create("978-4297131425", "実践Redis入門技術の仕組みから現場の活用まで", 3696)), new ParameterizedTypeReference<>() { } ); assertThat(response.getStatusCode()).isEqualTo(HttpStatus.CREATED); assertThat(response.getHeaders().getLocation()).isEqualTo(URI.create(String.format("http://localhost:%d/books/978-4297131425", port))); Book book = restTemplate.getForObject("/books/978-4297131425", Book.class); assertThat(book.getIsbn()).isEqualTo("978-4297131425"); assertThat(book.getTitle()).isEqualTo("実践Redis入門技術の仕組みから現場の活用まで"); assertThat(book.getPrice()).isEqualTo(3696); } } </pre> <h4 id="まとめ">まとめ</h4> <a class="keyword" href="https://d.hatena.ne.jp/keyword/Spring%20Framework">Spring Framework</a>の<code>TransactionSynchronization</code>を試してみました。 存在は知っていましたが、ちゃんと使ったことがなかったので今回確認しておいてよかったです。 思っていたよりも、動作にバリエーションがあったなという感じがしました。 </div> <footer class="entry-footer"> <div class="entry-tags-wrapper"> <div class="entry-tags"> </div> </div> Kazuhira <a href="https://kazuhira-r.hatenablog.com/entry/2023/06/04/231200"><time data-relative datetime="2023-06-04T14:12:00Z" title="2023-06-04T14:12:00Z" class="updated">2023-06-04 23:12</time></a> <a href="https://blog.hatena.ne.jp/Kazuhira/kazuhira-r.hatenablog.com/subscribe?utm_medium=button&utm_campaign=subscribe_blog&utm_source=blogs_entry_footer"> 読者になる </a> <div class="hatena-star-container" data-hatena-star-container data-hatena-star-url="https://kazuhira-r.hatenablog.com/entry/2023/06/04/231200" data-hatena-star-title="Spring FrameworkのTransactionSynchronizationを試す" data-hatena-star-variant="profile-icon" data-hatena-star-profile-url-template="https://blog.hatena.ne.jp/{username}/" ></div> <div class="social-buttons"> <div class="social-button-item"> <a 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