Initial

.gitattributes

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+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary

.gitignore

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+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

build.gradle

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+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '4.0.2'
+	id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'ru.ilug'
+version = '0.0.1-SNAPSHOT'
+description = 'Demo project for Spring Boot'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springframework.boot:spring-boot-starter-webmvc'
+
+	implementation 'org.hibernate.orm:hibernate-core:7.2.1.Final'
+	implementation 'org.hibernate.orm:hibernate-hikaricp:7.2.1.Final'
+	implementation 'com.zaxxer:HikariCP:7.0.2'
+	implementation 'org.mapstruct:mapstruct:1.6.3'
+	annotationProcessor 'org.mapstruct:mapstruct-processor:1.6.0'
+
+	runtimeOnly  'com.h2database:h2:2.4.240'
+
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok-mapstruct-binding:0.2.0'
+	testImplementation 'org.springframework.boot:spring-boot-starter-validation-test'
+	testImplementation 'org.springframework.boot:spring-boot-starter-webmvc-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

settings.gradle

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+rootProject.name = 'book-service'

src/main/java/ru/ilug/book_service/HibernateConfiguration.java

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+package ru.ilug.book_service;
+
+import org.hibernate.SessionFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class HibernateConfiguration {
+
+    @Bean
+    public SessionFactory sessionFactory() {
+        return new org.hibernate.cfg.Configuration().configure().buildSessionFactory();
+    }
+
+}

src/main/java/ru/ilug/book_service/UpdatedBookServiceApplication.java

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+package ru.ilug.book_service;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class UpdatedBookServiceApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(UpdatedBookServiceApplication.class, args);
+	}
+
+}

src/main/java/ru/ilug/book_service/data/repository/BookRepositoryImpl.java

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+package ru.ilug.book_service.data.repository;
+
+import lombok.RequiredArgsConstructor;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.hibernate.query.Query;
+import org.springframework.stereotype.Component;
+import ru.ilug.book_service.domain.BookRepository;
+import ru.ilug.book_service.domain.model.Book;
+
+import java.util.List;
+
+@Component
+@RequiredArgsConstructor
+public class BookRepositoryImpl implements BookRepository {
+
+    private final SessionFactory sessionFactory;
+
+    @Override
+    public List<Book> findPageable(int pageSize, int page) {
+        try (Session session = sessionFactory.openSession()) {
+            Query<Book> query = session.createQuery("FROM Book", Book.class);
+            query.setFirstResult(pageSize * page);
+            query.setMaxResults(pageSize);
+            return query.list();
+        }
+    }
+
+    @Override
+    public Book findById(long id) {
+        try (Session session = sessionFactory.openSession()) {
+            return session.find(Book.class, id);
+        }
+    }
+
+    @Override
+    public Book save(Book book) {
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = null;
+
+            try {
+                transaction = session.beginTransaction();
+                book = session.merge(book);
+                transaction.commit();
+
+                return book;
+            } catch (Exception e) {
+                if (transaction != null) {
+                    transaction.rollback();
+                }
+                throw e;
+            }
+        }
+    }
+
+    @Override
+    public void deleteById(long id) {
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = null;
+
+            try {
+                transaction = session.beginTransaction();
+                Book book = session.find(Book.class, id);
+                session.remove(book);
+                transaction.commit();
+            } catch (Exception e) {
+                if (transaction != null) {
+                    transaction.rollback();
+                }
+                throw e;
+            }
+        }
+    }
+}

src/main/java/ru/ilug/book_service/domain/BookRepository.java

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+package ru.ilug.book_service.domain;
+
+import ru.ilug.book_service.domain.model.Book;
+
+import java.util.List;
+
+public interface BookRepository {
+
+    List<Book> findPageable(int pageSize, int page);
+
+    Book findById(long id);
+
+    Book save(Book book);
+
+    void deleteById(long id);
+
+}

src/main/java/ru/ilug/book_service/domain/BookService.java

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+package ru.ilug.book_service.domain;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import ru.ilug.book_service.domain.model.Book;
+import ru.ilug.book_service.domain.model.BookUpdateRequest;
+
+import java.util.List;
+import java.util.function.Consumer;
+
+@Component
+@RequiredArgsConstructor
+public class BookService {
+
+    private final BookRepository bookRepository;
+
+    public List<Book> findPageable(int page) {
+        return bookRepository.findPageable(5, page);
+    }
+
+    public Book findById(long bookId) {
+        return bookRepository.findById(bookId);
+    }
+
+    public Book createNew(Book book) {
+        return bookRepository.save(book);
+    }
+
+    public Book update(long bookId, BookUpdateRequest request) {
+        Book book = bookRepository.findById(bookId);
+        updateBookFromUpdateRequest(book, request);
+        return bookRepository.save(book);
+    }
+
+    public void deleteById(long bookId) {
+        bookRepository.deleteById(bookId);
+    }
+
+    private void updateBookFromUpdateRequest(Book book, BookUpdateRequest request) {
+        setValueIfNotNull(request.title(), book::setTitle);
+        setValueIfNotNull(request.author(), book::setAuthor);
+        setValueIfNotNull(request.publicationYear(), book::setPublicationYear);
+        setValueIfNotNull(request.genre(), book::setGenre);
+    }
+
+    private <T> void setValueIfNotNull(T value, Consumer<T> valueSetter) {
+        if (value != null) {
+            valueSetter.accept(value);
+        }
+    }
+}

src/main/java/ru/ilug/book_service/domain/model/Book.java

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+package ru.ilug.book_service.domain.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "books")
+public class Book {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String title;
+    private String author;
+    @Column(unique = true)
+    private String isbn;
+    @Column(name = "publication_year")
+    private int publicationYear;
+    private Genre genre;
+
+    public enum Genre {
+        FICTION,
+        NON_FICTION,
+        SCIENCE,
+        HISTORY,
+        OTHER
+    }
+
+}

src/main/java/ru/ilug/book_service/domain/model/BookUpdateRequest.java

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+package ru.ilug.book_service.domain.model;
+
+import jakarta.annotation.Nullable;
+import jakarta.validation.constraints.Size;
+import org.hibernate.validator.constraints.Range;
+
+public record BookUpdateRequest(@Nullable @Size(min = 2, max = 100) String title,
+                                @Nullable @Size(min = 2, max = 100) String author,
+                                @Nullable @Range(min = 2000, max = 2026) Integer publicationYear,
+                                @Nullable Book.Genre genre) {
+}

src/main/java/ru/ilug/book_service/infrastructure/controller/BookController.java

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+package ru.ilug.book_service.infrastructure.controller;
+
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import ru.ilug.book_service.domain.BookService;
+import ru.ilug.book_service.domain.model.Book;
+import ru.ilug.book_service.domain.model.BookUpdateRequest;
+import ru.ilug.book_service.infrastructure.dto.BookDto;
+import ru.ilug.book_service.infrastructure.mapper.BookMapper;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/books")
+@RequiredArgsConstructor
+public class BookController {
+
+    private final BookService bookService;
+    private final BookMapper bookMapper;
+
+    @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
+    public List<Book> books(@RequestParam(required = false, defaultValue = "0") int page) {
+        return bookService.findPageable(page);
+    }
+
+    @GetMapping(value = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<Book> bookById(@PathVariable long id) {
+        Book book = bookService.findById(id);
+
+        if (book == null) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        return new ResponseEntity<>(book, HttpStatus.OK);
+    }
+
+    @PostMapping(consumes = MediaType.APPLICATION_JSON_VALUE)
+    public Book newBook(@Valid @RequestBody BookDto bookDto) {
+        Book book = bookMapper.toEntity(bookDto);
+        return bookService.createNew(book);
+    }
+
+    @PatchMapping(value = "/{id}")
+    public Book updateBook(@PathVariable long id,
+                           @Valid @RequestBody BookUpdateRequest request) {
+        return bookService.update(id, request);
+    }
+
+    @DeleteMapping(value = "/{id}")
+    public void deleteBook(@PathVariable long id) {
+        bookService.deleteById(id);
+    }
+
+}

src/main/java/ru/ilug/book_service/infrastructure/dto/BookDto.java

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+package ru.ilug.book_service.infrastructure.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Pattern;
+import jakarta.validation.constraints.Size;
+import org.hibernate.validator.constraints.Range;
+import ru.ilug.book_service.domain.model.Book;
+
+public record BookDto(@NotNull @Size(min = 2, max = 100) String title,
+                      @NotNull @Size(min = 2, max = 50) String author,
+                      @NotNull @NotBlank @Pattern(regexp = "\\d{3}-\\d-\\d{5}-\\d{3}-\\d") String isbn,
+                      @NotNull @Range(min = 2000, max = 2026) Integer publicationYear,
+                      @NotNull Book.Genre genre) {
+}

src/main/java/ru/ilug/book_service/infrastructure/mapper/BookMapper.java

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+package ru.ilug.book_service.infrastructure.mapper;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.MappingConstants;
+import org.mapstruct.ReportingPolicy;
+import ru.ilug.book_service.domain.model.Book;
+import ru.ilug.book_service.infrastructure.dto.BookDto;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface BookMapper {
+    Book toEntity(BookDto bookDto);
+
+    BookDto toBookDto(Book book);
+}

src/main/resources/application.properties

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+spring.application.name=updated-book-service

src/main/resources/hibernate.cfg.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+<hibernate-configuration>
+    <session-factory>
+        <property name="hibernate.connection.provider_class">
+            org.hibernate.hikaricp.internal.HikariCPConnectionProvider
+        </property>
+
+        <property name="hibernate.connection.driver_class">org.h2.Driver</property>
+        <property name="hibernate.connection.url">jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE</property>
+        <property name="hibernate.connection.username">sa</property>
+        <property name="hibernate.connection.password"/>
+
+        <property name="hibernate.hikari.minimumIdle">2</property>
+        <property name="hibernate.hikari.maximumPoolSize">10</property>
+        <property name="hibernate.hikari.idleTimeout">30000</property>
+        <property name="hibernate.hikari.connectionTimeout">20000</property>
+        <property name="hibernate.hikari.maxLifetime">1800000</property>
+
+        <property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
+        <property name="hibernate.show_sql">true</property>
+        <property name="hibernate.format_sql">true</property>
+        <property name="hibernate.hbm2ddl.auto">create-drop</property>
+
+        <mapping class="ru.ilug.book_service.domain.model.Book"/>
+    </session-factory>
+</hibernate-configuration>

src/test/java/ru/ilug/book_service/UpdatedBookServiceApplicationTests.java

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+package ru.ilug.book_service;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class UpdatedBookServiceApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}