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Author: harish2020Code

src/main/java/com/graphql/learn/GraphqlProjectApplication.java

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+package com.graphql.learn;
+
+import com.graphql.learn.entities.Book;
+import com.graphql.learn.services.BookService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class GraphqlProjectApplication implements CommandLineRunner {
+
+	@Autowired
+	private BookService bookService;
+	public static void main(String[] args) {
+		SpringApplication.run(GraphqlProjectApplication.class, args);
+	}
+
+
+	@Override
+	public void run(String... args) throws Exception {
+		Book b1 =  new Book();
+		b1.setTitle("Complete Reference");
+		b1.setDesc("For learning Spring boot");
+		b1.setPages(500);
+		b1.setPrice(5000);
+		b1.setAuthor("Kevin Smith");
+
+		Book b2 =  new Book();
+		b2.setTitle("Learn GraphL");
+		b2.setDesc("For learning GraphQL");
+		b2.setPages(250);
+		b2.setPrice(4000);
+		b2.setAuthor("Alex Smith");
+
+		Book b3 =  new Book();
+		b3.setTitle("Learn H2 Database");
+		b3.setDesc("For learning H2 Database");
+		b3.setPages(250);
+		b3.setPrice(4000);
+		b3.setAuthor("Steve Jones");
+
+		this.bookService.create(b1);
+		this.bookService.create(b2);
+		this.bookService.create(b3);
+
+
+	}
+}

src/main/java/com/graphql/learn/controllers/BookController.java

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+package com.graphql.learn.controllers;
+
+import com.graphql.learn.entities.Book;
+import com.graphql.learn.services.BookService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/books")
+public class BookController {
+
+    @Autowired
+    private BookService bookService;
+
+    //create
+    @PostMapping
+    public Book create(@RequestBody Book book){
+    return  this.bookService.create(book);
+    }
+
+    // get all
+    @GetMapping
+    public List<Book> getAll(){
+        return  this.bookService.getAll();
+    }
+
+    //get single book
+    @GetMapping("/{bookId}")
+    public Book getBook(@PathVariable int bookId){
+        return  this.bookService.get(bookId);
+    }
+}

src/main/java/com/graphql/learn/entities/Book.java

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+package com.graphql.learn.entities;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+
+
+@Entity
+@Table(name= "project_books")
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class Book {
+
+  //  @Id
+  //  @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private  int id;
+    private String title;
+    private String desc;
+    private String author;
+    private double price;
+    private int pages;
+
+}

src/main/java/com/graphql/learn/repositories/BookRep.java

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+package com.graphql.learn.repositories;
+
+import com.graphql.learn.entities.Book;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BookRep extends JpaRepository <Book, Integer> {
+}

src/main/java/com/graphql/learn/services/BookService.java

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+package com.graphql.learn.services;
+
+import com.graphql.learn.entities.Book;
+
+import java.util.List;
+
+public interface BookService {
+    //Create
+    Book create(Book book);
+
+    //get all
+    List<Book> getAll();
+
+    //get single book
+    Book get(int bookId);
+}

src/main/java/com/graphql/learn/services/impl/BookServiceImpl.java

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+package com.graphql.learn.services.impl;
+
+import com.graphql.learn.entities.Book;
+import com.graphql.learn.repositories.BookRep;
+import com.graphql.learn.services.BookService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class BookServiceImpl implements BookService {
+
+    private BookRep bookRep;
+
+    @Autowired
+    public BookServiceImpl(BookRep bookRep){
+        this.bookRep = bookRep;
+    }
+   @Override
+    public Book create(Book book) {
+        return this.bookRep.save(book);
+    }
+
+    @Override
+    public List<Book> getAll() {
+        return this.bookRep.findAll();
+    }
+
+    @Override
+    public Book get(int bookId) {
+        return this.bookRep.findById(bookId).orElseThrow(() ->new RuntimeException("Book you are looking for not found on server !!"));
+    }
+}

src/main/resources/application.properties

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+server.port = 8009
+spring.h2.console.enabled=true
+spring.datasource.url= jdbc:h2:mem:testdb
+spring.datasource.driver-class-name=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=admin
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.defer-datasource-initialization=true
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=true

src/test/java/com/graphql/learn/GraphqlProjectApplicationTests.java

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+package com.graphql.learn;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class GraphqlProjectApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}