Implement basic SQL support with a test; temporarily change some

datatypes
Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/BookstoreApplication.java

@@ -1,14 +1,40 @@
 package com.fjordtek.bookstore;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+import org.springframework.context.annotation.Bean;
+
+import com.fjordtek.bookstore.model.BookRepository;
+
+import com.fjordtek.bookstore.model.*;
 
 @SpringBootApplication
 public class BookstoreApplication extends SpringBootServletInitializer {
+	private static final Logger commonLogger = LoggerFactory.getLogger(BookstoreApplication.class);
 
 	public static void main(String[] args) {
 		SpringApplication.run(BookstoreApplication.class, args);
 	}
 
+	@Bean
+	public CommandLineRunner bookDatabaseRunner(BookRepository repository) {
+		
+		return (args) -> {
+			commonLogger.info("Add new books to a database");
+		
+			repository.save(new Book("Book 1 title", "Book 1 author", 2020, "aaa-b2b-c3c-444", 40.00));
+			repository.save(new Book("Book 2 title", "Book 2 author", 2005, "111-2b2-3c3-ddd", 20.17));
+			commonLogger.info("New books in the database");
+			for (Book student : repository.findAll()) {
+				commonLogger.info(student.toString());
+			}
+
+		};
+	}
+	
 }

bookstore/src/main/java/com/fjordtek/bookstore/model/Book.java

@@ -8,15 +8,25 @@ import javax.validation.constraints.Size;
 import javax.validation.constraints.Pattern;
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.NotEmpty;
-import javax.validation.constraints.PastOrPresent;
 
-import java.math.BigDecimal;
-import java.time.LocalDate;
+//import java.sql.Timestamp;
+//import javax.validation.constraints.PastOrPresent;
 
-import org.springframework.format.annotation.DateTimeFormat;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
 
+@Entity
 public class Book {
 	
+	////////////////////
+	// Primary key value in database
+
+	@Id
+	@GeneratedValue(strategy=GenerationType.AUTO)
+    private long          id;
+	
 	////////////////////
 	// Attributes with hard-coded constraints
 	
@@ -33,9 +43,11 @@ public class Book {
 	private String        author;
 	
 	@NotNull
-	@PastOrPresent
-	@DateTimeFormat(pattern = "yyyy")
-	private LocalDate     year;
+	//@PastOrPresent
+	//@DateTimeFormat(pattern = "yyyy")
+	// TODO: Prefer Timestamp data type
+	// private Timestamp     year;
+	private int           year;
 	
 	@NotNull
 	@NotEmpty(message = "Please provide an ISBN code for the book")
@@ -46,14 +58,16 @@ public class Book {
 	@NotNull
 	@DecimalMin(value = "0.01",   message = "Too low price value" )
 	@DecimalMax(value = "999.99", message = "Too high price value")
-	// Keep precision
-	private BigDecimal    price;
+	// TODO: Use BigDecimal to keep exact precision?
+	private double        price;
 
 	////////////////////
 	// Attribute setters
 	
 	// TODO consider accessibility restrictions?
 	
+	// Id generated automatically
+	
 	public void setTitle(String title) {
 		this.title = title;
 	}
@@ -62,7 +76,7 @@ public class Book {
 		this.author = author;
 	}
 	
-	public void setYear(LocalDate year) {
+	public void setYear(int year) {
 		this.year = year;
 	}
 	
@@ -70,7 +84,7 @@ public class Book {
 		this.isbn = isbn;
 	}
 	
-	public void setPrice(BigDecimal price) {
+	public void setPrice(double price) {
 		this.price = price;
 	}
 	
@@ -79,6 +93,8 @@ public class Book {
 	
 	// TODO consider accessibility restrictions?
 	
+	// Id generated automatically
+	
 	public String getTitle() {
 		return title;
 	}
@@ -87,7 +103,7 @@ public class Book {
 		return author;
 	}
 	
-	public LocalDate getYear() {
+	public int getYear() {
 		return year;
 	}
 	
@@ -95,25 +111,30 @@ public class Book {
 		return isbn;
 	}
 	
-	public BigDecimal getPrice() { 
+	public double getPrice() { 
 		return price;
 	}
 	
 	////////////////////
 	// Class constructors
 	
-	public Book() {
+	public Book() {}
+
+	public Book(String title, String author, int year, String isbn, double price) {
+		// super();
+	    this.title  = title;
+	    this.author = author;
+	    this.year   = year;
+	    this.isbn   = isbn;
+	    this.price  = price;
 	}
 	
-	// ...
-	
 	////////////////////
 	// Class overrides
 	
 	@Override
 	public String toString() {
-		// TODO
-		return "N/A (placeholder)";
+		return this.id + ", " + this.title + ", " + this.author + ", " + this.year + ", " + this.isbn + ", " + this.price;
 	}
 	
 	// ...

bookstore/src/main/java/com/fjordtek/bookstore/model/BookRepository.java

@@ -0,0 +1,13 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
+package com.fjordtek.bookstore.model;
+
+import java.util.List;
+
+import org.springframework.data.repository.CrudRepository;
+
+public interface BookRepository extends CrudRepository<Book, Long> {
+
+    List<Book> findById(String title);
+    
+}