Spring Data Envers：使用实体修订进行审计

使用Spring Data Envers演示实体修订的示例应用程序。

@H_502_10@背景

Spring Data Jpa提供粗略的审计信息。但是，如果您正在寻找确切的变化是什么 制作到一个实体，你可以用Spring Data Envers 这样做。

顾名思义，Spring DataEnvers利用并简化了Hibernate Envers的使用。

@H_502_10@依赖关系和配置

为了启用 Envers 功能，我们首先将spring-data-envers作为依赖项包含在内。

<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-envers</artifactId>
</dependency>

接下来是通知Spring Boot我们希望启用Envers的功能。这可以通过注释 aclass with 来完成。@Configuration@EnableJpaRepositories(repositoryfactorybeanClass = EnversRevisionRepositoryfactorybean.class)

示例可以在存储库配置中看到：

@Configuration
@EnableJpaRepositories(
        repositoryfactorybeanClass = EnversRevisionRepositoryfactorybean.class
)
public class RepositoryConfiguration {
}

启用实体审核

通过注释anwith，我们通知Spring我们希望对各自的实体进行审计。 以下示例显示我们希望审核与Book相关的所有活动：@Entity@Audited

@Entity
@Audited
public class Book {

    @Id
    @GeneratedValue
    private Long id;

    @NotBlank
    private String author;

    @NotBlank
    private String title;

}

接下来是扩展 aclass，以便允许我们利用审计修订功能。这可以通过将RevisionRepository接口扩展到我们的类来完成。在BookRepository 中可以看到一个例子：RepositoryRepository

public interface BookRepository extends JpaRepository<Book,Long>,RevisionRepository<Book,Long,Integer> {

}

验证

我们将利用来验证我们的实施是否有效。@SpringBoottest

创建时创建初始修订

@SpringBoottest
class BookRepositoryRevisionsTest {

    @Autowired
    private BookRepository repository;
    
    @Test
    void initialRevision() {
        Book book = repository.save(
                             Book.builder().author("Rudyard Kipling").title("Jungle Book").build()
                     );
        
        Revisions<Integer,Book> revisions = repository.findRevisions(book.getId());

        assertthat(revisions)
                .isNotEmpty()
                .allSatisfy(revision -> assertthat(revision.getEntity())
                        .extracting(Book::getId,Book::getAuthor,Book::getTitle)
                        .containsExactly(book.getId(),book.getAuthor(),book.getTitle())
                );
    }
}

修订号将增加，最新版本可用

@SpringBoottest
class BookRepositoryRevisionsTest {

    @Autowired
    private BookRepository repository;
    
    @Test
    void updateIncreasesRevisionNumber() {
        Book book = repository.save(
                             Book.builder().author("Rudyard Kipling").title("Jungle Book").build()
                     );
    
        book.setTitle("If");

        repository.save(book);

        Optional<Revision<Integer,Book>> revision = repository.findLastChangeRevision(book.getId());

        assertthat(revision)
                .isPresent()
                .hasValueSatisfying(rev ->
                        assertthat(rev.getRevisionNumber()).hasValue(2)
                )
                .hasValueSatisfying(rev ->
                        assertthat(rev.getEntity())
                                .extracting(Book::getTitle)
                                .containsOnly("If")
                );
    }
}

删除后，除其ID外，所有实体信息都将被删除

@SpringBoottest
class BookRepositoryRevisionsTest {

    @Autowired
    private BookRepository repository;
    
    @Test
    void deletedItemWillHaveRevisionRetained() {
        Book book = repository.save(
                             Book.builder().author("Rudyard Kipling").title("Jungle Book").build()
                     );

        repository.delete(book);

        Revisions<Integer,Book> revisions = repository.findRevisions(book.getId());

        assertthat(revisions).hasSize(2);

        Iterator<Revision<Integer,Book>> iterator = revisions.iterator();

        Revision<Integer,Book> initialRevision = iterator.next();
        Revision<Integer,Book> finalRevision = iterator.next();

        assertthat(initialRevision)
                .satisfies(rev ->
                        assertthat(rev.getEntity())
                                .extracting(Book::getId,Book::getTitle)
                                .containsExactly(book.getId(),book.getTitle())
                );

        assertthat(finalRevision)
                .satisfies(rev -> assertthat(rev.getEntity())
                        .extracting(Book::getId,Book::getTitle,Book::getAuthor)
                        .containsExactly(book.getId(),null,null)
                );
    }
}

以上所有测试都可以在BookRepositoryRevisionsTest 中找到。