Create BookDao interface, MySqlBookDao class

pom.xml

@@ -17,7 +17,6 @@
             https://raw.githubusercontent.com/mate-academy/style-guides/master/java/checkstyle.xml
         </maven.checkstyle.plugin.configLocation>
     </properties>
-
     <build>
         <plugins>
             <plugin>
@@ -56,4 +55,11 @@
             </plugins>
         </pluginManagement>
     </build>
+    <dependencies>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
+    </dependencies>
 </project>

src/main/java/mate/academy/Main.java

@@ -1,7 +1,59 @@
 package mate.academy;
 
+import java.math.BigDecimal;
+import java.util.List;
+import mate.academy.lib.Injector;
+import mate.academy.model.Book;
+import mate.academy.repository.BookDao;
+
 public class Main {
+    private static final Injector INJECTOR = Injector.getInstance("mate.academy");
+    private static final List<Book> LIBRARY;
+
+    static {
+        Book book1 = new Book();
+        book1.setTitle("\"Flowers for Algernon\" Daniel Keyes");
+        book1.setPrice(BigDecimal.valueOf(8));
+
+        Book book2 = new Book();
+        book2.setTitle("\"Shining\" Stephen King");
+        book2.setPrice(BigDecimal.valueOf(13));
+
+        Book book3 = new Book();
+        book3.setTitle("\"Fight Club\" Chuck Palahniuk");
+        book3.setPrice(BigDecimal.valueOf(20));
+
+        LIBRARY = List.of(book1, book2, book3);
+    }
+
     public static void main(String[] args) {
+        //Get BookDao instance using Injector
+        BookDao bookDao = (BookDao) INJECTOR.getInstance(BookDao.class);
+
+        //Create new books in the database
+        LIBRARY.forEach(bookDao::create);
+
+        //Read all books from the database and compare it with library list
+        List<Book> booksFromDB = bookDao.findAll();
+        System.out.println("Books from database:");
+        booksFromDB.forEach(System.out::println);
+
+        //Find by id
+        Book bookFromLib = LIBRARY.get(0);
+        Book bookFromDb = bookDao.findById(bookFromLib.getId()).orElseThrow();
+        System.out.println("Book from db: " + bookFromDb + System.lineSeparator());
+
+        //Update
+        bookFromLib.setTitle("Updated title");
+        bookDao.update(bookFromLib);
+        bookFromDb = bookDao.findById(bookFromLib.getId()).orElseThrow();
+        System.out.println("Expect that title is updated: "
+                + bookFromDb + System.lineSeparator());
+
+        //Delete by id
+        bookDao.deleteById(bookFromLib.getId());
 
+        //Delete all books in the database
+        LIBRARY.forEach(book -> bookDao.deleteById(book.getId()));
     }
 }

src/main/java/mate/academy/exception/DataProcessingException.java

@@ -0,0 +1,11 @@
+package mate.academy.exception;
+
+public class DataProcessingException extends RuntimeException {
+    public DataProcessingException(String message) {
+        super(message);
+    }
+
+    public DataProcessingException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/mate/academy/model/Book.java

@@ -0,0 +1,42 @@
+package mate.academy.model;
+
+import java.math.BigDecimal;
+
+public class Book {
+    private Long id;
+    private String title;
+    private BigDecimal price;
+
+    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 BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{"
+                + "id=" + id
+                + ", title='" + title + '\''
+                + ", price=" + price
+                + '}';
+    }
+}

src/main/java/mate/academy/repository/BookDao.java

@@ -0,0 +1,17 @@
+package mate.academy.repository;
+
+import java.util.List;
+import java.util.Optional;
+import mate.academy.model.Book;
+
+public interface BookDao {
+    Book create(Book book);
+
+    Optional<Book> findById(Long id);
+
+    List<Book> findAll();
+
+    Book update(Book book);
+
+    boolean deleteById(Long id);
+}

src/main/java/mate/academy/repository/MySqlBookDao.java

@@ -0,0 +1,119 @@
+package mate.academy.repository;
+
+import java.math.BigDecimal;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.lib.Dao;
+import mate.academy.model.Book;
+
+@Dao
+public class MySqlBookDao implements BookDao {
+    private static final int ID_PARAMETER_INDEX = 1;
+    private static final int TITLE_PARAMETER_INDEX = 1;
+    private static final int PRICE_PARAMETER_INDEX = 2;
+    private static final int UPDATE_ID_PARAMETER_INDEX = 3;
+    private static final int ZERO_AFFECTED_ROW = 0;
+    private static final String ID_ROW_LABEL = "id";
+    private static final String TITLE_ROW_LABEL = "title";
+    private static final String PRICE_ROW_LABEL = "price";
+
+    @Override
+    public Book create(Book book) {
+        String query = "INSERT INTO book(title, price) VALUES(?, ?)";
+        try (Connection connection = MySqlConnectionManager.getConnection();
+                PreparedStatement statement = connection
+                        .prepareStatement(query, Statement.RETURN_GENERATED_KEYS)) {
+            statement.setString(TITLE_PARAMETER_INDEX, book.getTitle());
+            statement.setBigDecimal(PRICE_PARAMETER_INDEX, book.getPrice());
+            statement.executeUpdate();
+            ResultSet generatedKeys = statement.getGeneratedKeys();
+            if (generatedKeys.next()) {
+                book.setId(generatedKeys.getLong(1));
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException(
+                    "Cannot create new book, something gone wrong: " + book, e);
+        }
+        return book;
+    }
+
+    @Override
+    public Optional<Book> findById(Long id) {
+        String query = "SELECT * FROM book WHERE id = ?";
+        try (Connection connection = MySqlConnectionManager.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setLong(ID_PARAMETER_INDEX, id);
+            ResultSet resultSet = statement.executeQuery();
+            if (resultSet.next()) {
+                Book book = parseToObject(resultSet);
+                return Optional.of(book);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException(
+                    "Can't get Book from database by id " + id, e);
+        }
+        return Optional.empty();
+    }
+
+    @Override
+    public List<Book> findAll() {
+        String query = "SELECT * FROM book";
+        List<Book> resultList = new ArrayList<>();
+        try (Connection connection = MySqlConnectionManager.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            ResultSet resultSet = statement.executeQuery();
+            while (resultSet.next()) {
+                Book book = parseToObject(resultSet);
+                resultList.add(book);
+            }
+        } catch (SQLException e) {
+            throw new DataProcessingException("Cannot get books from database", e);
+        }
+        return resultList;
+    }
+
+    @Override
+    public Book update(Book book) {
+        String query = "UPDATE book SET title= ?, price= ? WHERE id = ?";
+        try (Connection connection = MySqlConnectionManager.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setString(TITLE_PARAMETER_INDEX, book.getTitle());
+            statement.setBigDecimal(PRICE_PARAMETER_INDEX, book.getPrice());
+            statement.setLong(UPDATE_ID_PARAMETER_INDEX, book.getId());
+            statement.executeUpdate();
+        } catch (SQLException e) {
+            throw new DataProcessingException("Book was not updated: " + book, e);
+        }
+        return book;
+    }
+
+    @Override
+    public boolean deleteById(Long id) {
+        String query = "DELETE FROM book WHERE id =?";
+        try (Connection connection = MySqlConnectionManager.getConnection();
+                PreparedStatement statement = connection.prepareStatement(query)) {
+            statement.setLong(ID_PARAMETER_INDEX, id);
+            return statement.executeUpdate() > ZERO_AFFECTED_ROW;
+        } catch (SQLException e) {
+            throw new DataProcessingException("Cannot delete book by id " + id, e);
+        }
+    }
+
+    private Book parseToObject(ResultSet resultSet) throws SQLException {
+        Long id = resultSet.getObject(ID_ROW_LABEL, Long.class);
+        String title = resultSet.getString(TITLE_ROW_LABEL);
+        BigDecimal price = resultSet.getBigDecimal(PRICE_ROW_LABEL);
+        Book book = new Book();
+        book.setId(id);
+        book.setTitle(title);
+        book.setPrice(price);
+        return book;
+    }
+}

src/main/java/mate/academy/repository/MySqlConnectionManager.java

@@ -0,0 +1,27 @@
+package mate.academy.repository;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class MySqlConnectionManager {
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/library";
+    private static final Properties DB_PROPERTIES;
+
+    static {
+        DB_PROPERTIES = new Properties();
+        DB_PROPERTIES.put("user", "test");
+        DB_PROPERTIES.put("password", "StrongSecret1234");
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("MySQL JDBC driver not found", e);
+        }
+    }
+
+    public static Connection getConnection() throws SQLException {
+        return DriverManager.getConnection(DB_URL, DB_PROPERTIES);
+    }
+}

src/main/resources/init_db.sql

@@ -0,0 +1,7 @@
+CREATE SCHEMA library;
+USE library;
+CREATE TABLE book (
+	id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    title VARCHAR(255) NOT NULL,
+    price DECIMAL NOT NULL
+    )