created book entity

pom.xml

@@ -47,6 +47,12 @@
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>test</scope>
+        </dependency>
+
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
@@ -67,6 +73,11 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/org/example/SpringBootBookShopApplication.java

@@ -11,6 +11,7 @@ public class SpringBootBookShopApplication {
     public static void main(String[] args) {
         SpringApplication.run(SpringBootBookShopApplication.class, args);
     }
+
     @Bean
     public CommandLineRunner commandLineRunner() {
         return new CommandLineRunner() {

src/main/java/org/example/exception/DataProcessingException.java

@@ -0,0 +1,11 @@
+package org.example.exception;
+
+public class DataProcessingException extends RuntimeException {
+    public DataProcessingException(String message, Exception e) {
+        super(message);
+    }
+
+    public DataProcessingException(String message) {
+        super(message);
+    }
+}

src/main/java/org/example/model/Book.java

@@ -1,4 +1,30 @@
 package org.example.model;
 
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import java.math.BigDecimal;
+import lombok.Data;
+
+@Entity
+@Data
+@Table(name = "book")
 public class Book {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    @Column(nullable = false)
+    private String title;
+    @Column(nullable = false)
+    private String author;
+    @Column(nullable = false, unique = true)
+    private String isbn;
+    @Column(nullable = false)
+    private BigDecimal price;
+    private String description;
+    private String coverImage;
 }

src/main/java/org/example/repository/BookRepository.java

@@ -1,4 +1,10 @@
 package org.example.repository;
 
+import java.util.List;
+import org.example.model.Book;
+
 public interface BookRepository {
+    Book save(Book book);
+
+    List<Book> findAll();
 }

src/main/java/org/example/repository/impl/BookRepositoryImpl.java

@@ -1,4 +1,54 @@
 package org.example.repository.impl;
 
-public class BookRepositoryImpl {
+import jakarta.persistence.criteria.CriteriaQuery;
+import java.util.List;
+import org.example.exception.DataProcessingException;
+import org.example.model.Book;
+import org.example.repository.BookRepository;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class BookRepositoryImpl implements BookRepository {
+    private final SessionFactory sessionFactory;
+
+    public BookRepositoryImpl(SessionFactory sessionFactory) {
+        this.sessionFactory = sessionFactory;
+    }
+
+    @Override
+    public Book save(Book book) {
+        Transaction transaction = null;
+        Session session = null;
+        try {
+            session = sessionFactory.openSession();
+            transaction = session.beginTransaction();
+            session.persist(book);
+            transaction.commit();
+            return book;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new DataProcessingException("Can't insert book " + book, e);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+    }
+
+    @Override
+    public List<Book> findAll() {
+        try (Session session = sessionFactory.openSession()) {
+            CriteriaQuery<Book> criteriaQuery = session.getCriteriaBuilder()
+                    .createQuery(Book.class);
+            criteriaQuery.from(Book.class);
+            return session.createQuery(criteriaQuery).getResultList();
+        } catch (Exception e) {
+            throw new DataProcessingException("Can't get all books", e);
+        }
+    }
 }

src/main/java/org/example/service/BookService.java

@@ -1,4 +1,10 @@
 package org.example.service;
 
+import java.util.List;
+import org.example.model.Book;
+
 public interface BookService {
+    Book save(Book book);
+
+    List<Book> findAll();
 }

src/main/java/org/example/service/impl/BookServiceImpl.java

@@ -1,4 +1,26 @@
 package org.example.service.impl;
 
-public class BookServiceImpl {
+import java.util.List;
+import org.example.model.Book;
+import org.example.repository.BookRepository;
+import org.example.service.BookService;
+import org.springframework.stereotype.Service;
+
+@Service
+public class BookServiceImpl implements BookService {
+    private final BookRepository bookRepository;
+
+    public BookServiceImpl(BookRepository bookRepository) {
+        this.bookRepository = bookRepository;
+    }
+
+    @Override
+    public Book save(Book book) {
+        return bookRepository.save(book);
+    }
+
+    @Override
+    public List<Book> findAll() {
+        return bookRepository.findAll();
+    }
 }

src/main/resources/application.properties

@@ -1,7 +1,8 @@
 spring.datasource.url=jdbc:mysql://localhost:3306/svitlana?serverTimezone=UTC
 spring.datasource.username=root
 spring.datasource.password=Wetuop34!
-spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.driver-class-name=org.h2.Driver
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
 
 spring.jpa.hibernate.ddl-auto=create-drop
-spring.jpa.show-sql=true
+spring.jpa.show-sql=true

src/test/resources/application.properties

@@ -1,7 +1,8 @@
 spring.datasource.url=jdbc:mysql://localhost:3306/svitlana?serverTimezone=UTC
 spring.datasource.username=root
 spring.datasource.password=Wetuop34!
-spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.driver-class-name=org.h2.Driver
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
 
 spring.jpa.hibernate.ddl-auto=create-drop
-spring.jpa.show-sql=true
+spring.jpa.show-sql=true