Merge pull request #1 from JOAONUNES96/spring-data-jpa

Spring data jpa

pom.xml

@@ -14,7 +14,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.2.RELEASE</version>
+		<version>2.1.0.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 

src/main/java/guru/springframework/spring5webapp/bootstrap/DataInitializer.java

@@ -0,0 +1,40 @@
+package guru.springframework.spring5webapp.bootstrap;
+
+import guru.springframework.spring5webapp.domain.Book;
+import guru.springframework.spring5webapp.repositories.BookRepository;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+/**
+ * Created by João Nunes on 12/06/2023.
+ */
+@Component
+public class DataInitializer implements CommandLineRunner {
+
+    private final BookRepository bookRepository;
+
+    public DataInitializer(BookRepository bookRepository) {
+        this.bookRepository = bookRepository;
+    }
+
+
+    @Override
+    public void run(String... args) throws Exception {
+        Book bookDDD = new Book("Domain Driven Design", "123", "RandomHouse");
+
+        System.out.println("Id: " + bookDDD.getId());
+
+        Book savedDDD = bookRepository.save(bookDDD);
+
+        System.out.println("Id: " + savedDDD.getId());
+
+        Book bookSIA = new Book("Spring in Action", "123", "RandomHouse");
+
+        Book savedSIA = bookRepository.save(bookSIA);
+
+        bookRepository.findAll().forEach(book -> {
+            System.out.println("Book Id: " + book.getId());
+            System.out.println("Book Title: " + book.getTitle());
+        });
+    }
+}

src/main/java/guru/springframework/spring5webapp/domain/Book.java

@@ -0,0 +1,73 @@
+package guru.springframework.spring5webapp.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import java.util.Objects;
+
+@Entity
+public class Book {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String title;
+    private String isbn;
+    private String publisher;
+
+    public Book() {
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Book book = (Book) o;
+
+        return Objects.equals(id, book.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return id != null ? id.hashCode() : 0;
+    }
+
+    public Book(String title, String isbn, String publisher) {
+        this.title = title;
+        this.isbn = isbn;
+        this.publisher = publisher;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    public String getPublisher() {
+        return publisher;
+    }
+
+    public void setPublisher(String publisher) {
+        this.publisher = publisher;
+    }
+}

src/main/java/guru/springframework/spring5webapp/repositories/BookRepository.java

@@ -0,0 +1,9 @@
+package guru.springframework.spring5webapp.repositories;
+
+import guru.springframework.spring5webapp.domain.Book;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+
+// I could also have used the annotations
+public interface BookRepository extends JpaRepository<Book, Long> {
+}

src/main/resources/application.properties

@@ -0,0 +1,16 @@
+#spring.jpa.show-sql=true
+
+#Show SQL
+spring.jpa.properties.hibernate.show_sql=true
+
+#Format SQL
+spring.jpa.properties.hibernate.format_sql=true
+
+#Show bind values
+logging.level.org.hibernate.type.descriptor.sql=trace
+
+spring.h2.console.enabled=true
+
+
+
+