Checkpoint

buisnesslogic/src/main/java/com/plannaplan/Book.java

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+package com.plannaplan;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+public class Book {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    // standard constructors
+
+    // standard getters and setters
+}

buisnesslogic/src/main/java/com/plannaplan/BookRepository.java

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+package com.plannaplan;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface BookRepository extends JpaRepository<Book, Long> {
+}

buisnesslogic/src/main/java/com/plannaplan/BookService.java

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+package com.plannaplan;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class BookService {
+
+    @Autowired
+    private BookRepository bookRepository;
+
+    public List<Book> list() {
+        return bookRepository.findAll();
+    }
+}