Was added: BookDto classes, Mapper with config class, BookController, new exception. Was updated: BookRepository, BookService

pom.xml

@@ -18,6 +18,8 @@
 	<properties>
 		<java.version>17</java.version>
 		<maven.checkstyle.plugin.configLocation>checkstyle.xml</maven.checkstyle.plugin.configLocation>
+		<mapstruct.version>1.5.5.Final</mapstruct.version>
+		<lombok.mapstruct.binding.version>0.2.0</lombok.mapstruct.binding.version>
 	</properties>
 
 	<dependencies>
@@ -26,6 +28,11 @@
 			<artifactId>spring-boot-starter</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>mysql</groupId>
 			<artifactId>mysql-connector-java</artifactId>
@@ -42,6 +49,12 @@
 			<artifactId>lombok</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.mapstruct</groupId>
+			<artifactId>mapstruct</artifactId>
+			<version>${mapstruct.version}</version>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
@@ -75,6 +88,32 @@
 					<consoleOutput>true</consoleOutput>
 					<failsOnError>true</failsOnError>
 					<linkXRef>false</linkXRef>
+					<sourceDirectories>src</sourceDirectories>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<configuration>
+					<source>${java.version}</source>
+					<target>${java.version}</target>
+					<annotationProcessorPaths>
+						<path>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+							<version>${lombok.version}</version>
+						</path>
+						<path>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok-mapstruct-binding</artifactId>
+							<version>${lombok.mapstruct.binding.version}</version>
+						</path>
+						<path>
+							<groupId>org.mapstruct</groupId>
+							<artifactId>mapstruct-processor</artifactId>
+							<version>${mapstruct.version}</version>
+						</path>
+					</annotationProcessorPaths>
 				</configuration>
 			</plugin>
 			<plugin>

src/main/java/book/store/OnlineBookStoreApplication.java

@@ -1,37 +1,13 @@
 package book.store;
 
-import book.store.model.Book;
-import book.store.service.BookService;
-import java.math.BigDecimal;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.annotation.Bean;
 
 @SpringBootApplication
 public class OnlineBookStoreApplication {
-    @Autowired
-    private BookService bookService;
 
     public static void main(String[] args) {
         SpringApplication.run(OnlineBookStoreApplication.class, args);
     }
 
-    @Bean
-    public CommandLineRunner commandLineRunner() {
-        return new CommandLineRunner() {
-            @Override
-            public void run(String... args) throws Exception {
-                Book theFountainhead = new Book();
-                theFountainhead.setTitle("Джерело");
-                theFountainhead.setAuthor("Айн Ренд");
-                theFountainhead.setIsbn("9786177279555");
-                theFountainhead.setPrice(BigDecimal.valueOf(396));
-
-                bookService.save(theFountainhead);
-                System.out.println(bookService.findAll());
-            }
-        };
-    }
 }

src/main/java/book/store/config/MapperConfig.java

@@ -0,0 +1,13 @@
+package book.store.config;
+
+import org.mapstruct.InjectionStrategy;
+import org.mapstruct.NullValueCheckStrategy;
+
+@org.mapstruct.MapperConfig(
+        componentModel = "spring",
+        injectionStrategy = InjectionStrategy.CONSTRUCTOR,
+        nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS,
+        implementationPackage = "<PACKAGE_NAME>.impl"
+)
+public class MapperConfig {
+}

src/main/java/book/store/controller/BookController.java

@@ -0,0 +1,35 @@
+package book.store.controller;
+
+import book.store.dto.book.BookDto;
+import book.store.dto.book.CreateBookRequestDto;
+import book.store.service.BookService;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RequiredArgsConstructor
+@RestController
+@RequestMapping(value = "/books")
+public class BookController {
+    private final BookService bookService;
+
+    @GetMapping
+    public List<BookDto> getAll() {
+        return bookService.findAll();
+    }
+
+    @GetMapping("/{id}")
+    public BookDto getBookById(@PathVariable Long id) {
+        return bookService.findById(id);
+    }
+
+    @PostMapping
+    public BookDto createBook(@RequestBody CreateBookRequestDto bookDto) {
+        return bookService.save(bookDto);
+    }
+}

src/main/java/book/store/dto/book/BookDto.java

@@ -0,0 +1,15 @@
+package book.store.dto.book;
+
+import java.math.BigDecimal;
+import lombok.Data;
+
+@Data
+public class BookDto {
+    private Long id;
+    private String title;
+    private String author;
+    private String isbn;
+    private BigDecimal price;
+    private String description;
+    private String coverImage;
+}

src/main/java/book/store/dto/book/CreateBookRequestDto.java

@@ -0,0 +1,14 @@
+package book.store.dto.book;
+
+import java.math.BigDecimal;
+import lombok.Data;
+
+@Data
+public class CreateBookRequestDto {
+    private String title;
+    private String author;
+    private String isbn;
+    private BigDecimal price;
+    private String description;
+    private String coverImage;
+}

src/main/java/book/store/exception/EntityNotFoundException.java

@@ -0,0 +1,7 @@
+package book.store.exception;
+
+public class EntityNotFoundException extends RuntimeException {
+    public EntityNotFoundException(String message) {
+        super(message);
+    }
+}

src/main/java/book/store/mapper/BookMapper.java

@@ -0,0 +1,14 @@
+package book.store.mapper;
+
+import book.store.config.MapperConfig;
+import book.store.dto.book.BookDto;
+import book.store.dto.book.CreateBookRequestDto;
+import book.store.model.Book;
+import org.mapstruct.Mapper;
+
+@Mapper(config = MapperConfig.class)
+public interface BookMapper {
+    BookDto toDto(Book book);
+
+    Book toModel(CreateBookRequestDto requestDto);
+}

src/main/java/book/store/repository/BookRepository.java

@@ -2,9 +2,12 @@
 
 import book.store.model.Book;
 import java.util.List;
+import java.util.Optional;
 
 public interface BookRepository {
     Book save(Book book);
 
     List<Book> findAll();
+
+    Optional<Book> findById(Long id);
 }

src/main/java/book/store/repository/impl/BookRepositoryImpl.java

@@ -5,6 +5,7 @@
 import book.store.repository.BookRepository;
 import jakarta.persistence.criteria.CriteriaQuery;
 import java.util.List;
+import java.util.Optional;
 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
@@ -53,4 +54,12 @@ public List<Book> findAll() {
             throw new DataProcessingException("Can't get all books", e);
         }
     }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        try (Session session = sessionFactory.openSession()) {
+            Book book = session.find(Book.class, id);
+            return Optional.ofNullable(book);
+        }
+    }
 }

src/main/java/book/store/service/BookService.java

@@ -1,10 +1,13 @@
 package book.store.service;
 
-import book.store.model.Book;
+import book.store.dto.book.BookDto;
+import book.store.dto.book.CreateBookRequestDto;
 import java.util.List;
 
 public interface BookService {
-    Book save(Book book);
+    BookDto save(CreateBookRequestDto requestDto);
 
-    List<Book> findAll();
+    List<BookDto> findAll();
+
+    BookDto findById(Long id);
 }

src/main/java/book/store/service/impl/BookServiceImpl.java

@@ -1,5 +1,9 @@
 package book.store.service.impl;
 
+import book.store.dto.book.BookDto;
+import book.store.dto.book.CreateBookRequestDto;
+import book.store.exception.EntityNotFoundException;
+import book.store.mapper.BookMapper;
 import book.store.model.Book;
 import book.store.repository.BookRepository;
 import book.store.service.BookService;
@@ -10,19 +14,32 @@
 @Service
 public class BookServiceImpl implements BookService {
     private final BookRepository bookRepository;
+    private final BookMapper bookMapper;
 
     @Autowired
-    public BookServiceImpl(BookRepository bookRepository) {
+    public BookServiceImpl(BookRepository bookRepository, BookMapper bookMapper) {
         this.bookRepository = bookRepository;
+        this.bookMapper = bookMapper;
     }
 
     @Override
-    public Book save(Book book) {
-        return bookRepository.save(book);
+    public BookDto save(CreateBookRequestDto requestDto) {
+        Book book = bookRepository.save(bookMapper.toModel(requestDto));
+        return bookMapper.toDto(book);
     }
 
     @Override
-    public List<Book> findAll() {
-        return bookRepository.findAll();
+    public List<BookDto> findAll() {
+        return bookRepository.findAll().stream()
+                .map(bookMapper::toDto)
+                .toList();
+    }
+
+    @Override
+    public BookDto findById(Long id) {
+        Book book = bookRepository.findById(id).orElseThrow(
+                () -> new EntityNotFoundException("Can't find a book by id" + id)
+        );
+        return bookMapper.toDto(book);
     }
 }

src/main/resources/application.properties

@@ -5,3 +5,4 @@ spring.datasource.password=password
 
 spring.jpa.show-sql=true
 spring.jpa.hibernate.ddl-auto=create-drop
+spring.jackson.deserialization.fail-on-unknown-properties=true

src/test/java/book/store/OnlineBookStoreApplicationTests.java

@@ -6,8 +6,8 @@
 @SpringBootTest
 class OnlineBookStoreApplicationTests {
 
-	@Test
-	void contextLoads() {
-	}
+    @Test
+    void contextLoads() {
+    }
 
 }