developed prototype

mem.properties

@@ -0,0 +1,5 @@
+#HSQL Database Engine 2.3.4
+#Fri Oct 25 09:25:26 EEST 2024
+modified=no
+tx_timestamp=0
+version=2.3.4

mem.script

@@ -0,0 +1,45 @@
+SET DATABASE UNIQUE NAME HSQLDB92C24DE718
+SET DATABASE GC 0
+SET DATABASE DEFAULT RESULT MEMORY ROWS 0
+SET DATABASE EVENT LOG LEVEL 0
+SET DATABASE TRANSACTION CONTROL LOCKS
+SET DATABASE DEFAULT ISOLATION LEVEL READ COMMITTED
+SET DATABASE TRANSACTION ROLLBACK ON CONFLICT TRUE
+SET DATABASE TEXT TABLE DEFAULTS ''
+SET DATABASE SQL NAMES FALSE
+SET DATABASE SQL REFERENCES FALSE
+SET DATABASE SQL SIZE TRUE
+SET DATABASE SQL TYPES FALSE
+SET DATABASE SQL TDC DELETE TRUE
+SET DATABASE SQL TDC UPDATE TRUE
+SET DATABASE SQL TRANSLATE TTI TYPES TRUE
+SET DATABASE SQL TRANSLATE TTI TYPES TRUE
+SET DATABASE SQL CONCAT NULLS TRUE
+SET DATABASE SQL UNIQUE NULLS TRUE
+SET DATABASE SQL CONVERT TRUNCATE TRUE
+SET DATABASE SQL AVG SCALE 0
+SET DATABASE SQL DOUBLE NAN TRUE
+SET FILES WRITE DELAY 500 MILLIS
+SET FILES BACKUP INCREMENT TRUE
+SET FILES CACHE SIZE 10000
+SET FILES CACHE ROWS 50000
+SET FILES SCALE 32
+SET FILES LOB SCALE 32
+SET FILES DEFRAG 0
+SET FILES NIO TRUE
+SET FILES NIO SIZE 256
+SET FILES LOG TRUE
+SET FILES LOG SIZE 50
+CREATE USER SA PASSWORD DIGEST 'd41d8cd98f00b204e9800998ecf8427e'
+ALTER USER SA SET LOCAL TRUE
+CREATE SCHEMA PUBLIC AUTHORIZATION DBA
+ALTER SEQUENCE SYSTEM_LOBS.LOB_ID RESTART WITH 1
+SET DATABASE DEFAULT INITIAL SCHEMA PUBLIC
+GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.SQL_IDENTIFIER TO PUBLIC
+GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.YES_OR_NO TO PUBLIC
+GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.TIME_STAMP TO PUBLIC
+GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.CARDINAL_NUMBER TO PUBLIC
+GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.CHARACTER_DATA TO PUBLIC
+GRANT DBA TO SA
+SET SCHEMA SYSTEM_LOBS
+INSERT INTO BLOCKS VALUES(0,2147483647,0)

pom.xml

@@ -20,6 +20,16 @@
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.hibernate.orm</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>6.6.1.Final</version>
+        </dependency>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>9.1.0</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>

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

@@ -1,7 +1,24 @@
 package mate.academy;
 
+import mate.academy.lib.Injector;
+import mate.academy.model.Movie;
+import mate.academy.service.MovieService;
+
 public class Main {
-    public static void main(String[] args) {
+    private static final Injector injector = Injector
+            .getInstance("mate.academy");
+    private static final Movie MOVIE = new Movie("Shrek", "Angry and green");
+    private static final Movie MOVIE2 = new Movie("Shrek 2", "Angry and green");
+    private static final Movie MOVIE3 = new Movie("Shrek 3", "Angry and green");
+    private static final Movie MOVIE4 = new Movie("Shrek 4", "Angry and green");
+    private static final Long LONG = 1L;
 
+    public static void main(String[] args) {
+        MovieService movieService = (MovieService) injector.getInstance(MovieService.class);
+        movieService.add(MOVIE);
+        movieService.add(MOVIE2);
+        movieService.add(MOVIE3);
+        movieService.add(MOVIE4);
+        movieService.get(LONG);
     }
 }

src/main/java/mate/academy/dao/MovieDao.java

@@ -0,0 +1,10 @@
+package mate.academy.dao;
+
+import java.util.Optional;
+import mate.academy.model.Movie;
+
+public interface MovieDao {
+    Movie add(Movie movie);
+
+    Optional<Movie> get(Long id);
+}

src/main/java/mate/academy/dao/MovieDaoImpl.java

@@ -0,0 +1,46 @@
+package mate.academy.dao;
+
+import java.util.Optional;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.lib.Dao;
+import mate.academy.model.Movie;
+import mate.academy.util.HibernateUtil;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+
+@Dao
+public class MovieDaoImpl implements MovieDao {
+    @Override
+    public Movie add(Movie movie) {
+        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
+        Session session = null;
+        Transaction transaction = null;
+        try {
+            session = sessionFactory.openSession();
+            transaction = session.beginTransaction();
+            session.save(movie);
+            transaction.commit();
+            return movie;
+        } catch (Exception e) {
+            if (transaction != null) {
+                transaction.rollback();
+            }
+            throw new DataProcessingException("Failed to add new movie to the DB", e);
+        } finally {
+            if (session != null) {
+                session.close();
+            }
+        }
+    }
+
+    @Override
+    public Optional<Movie> get(Long id) {
+        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            return Optional.ofNullable(session.get(Movie.class, id));
+        } catch (Exception e) {
+            throw new DataProcessingException("Can't get movie from DB", e);
+        }
+    }
+}

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, Throwable ex) {
+        super(message, ex);
+    }
+
+    public DataProcessingException(String message) {
+        super(message);
+    }
+}

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

@@ -0,0 +1,60 @@
+package mate.academy.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+@Entity
+@Table(name = "movies")
+public class Movie {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String title;
+    private String description;
+
+    public Movie() {
+    }
+
+    public Movie(String title, String description) {
+        this.title = title;
+        this.description = description;
+    }
+
+    public Movie(Long id, String title, String description) {
+        this.id = id;
+        this.title = title;
+        this.description = description;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    @Override
+    public String toString() {
+        return "Movie{"
+                + "id=" + id
+                + ", title='" + title + '\''
+                + ", description='" + description + '\''
+                + '}';
+    }
+}

src/main/java/mate/academy/service/MovieService.java

@@ -0,0 +1,9 @@
+package mate.academy.service;
+
+import mate.academy.model.Movie;
+
+public interface MovieService {
+    Movie add(Movie movie);
+
+    Movie get(Long id);
+}

src/main/java/mate/academy/service/MovieServiceImpl.java

@@ -0,0 +1,31 @@
+package mate.academy.service;
+
+import java.util.Optional;
+import mate.academy.dao.MovieDao;
+import mate.academy.exception.DataProcessingException;
+import mate.academy.lib.Inject;
+import mate.academy.lib.Injector;
+import mate.academy.lib.Service;
+import mate.academy.model.Movie;
+
+@Service
+public class MovieServiceImpl implements MovieService {
+    private static final Injector injector = Injector
+            .getInstance("mate.academy");
+    @Inject
+    private final MovieDao movieDao = (MovieDao) injector.getInstance(MovieDao.class);
+
+    @Override
+    public Movie add(Movie movie) {
+        return movieDao.add(movie);
+    }
+
+    @Override
+    public Movie get(Long id) {
+        Optional<Movie> movie = movieDao.get(id);
+        if (movie.isEmpty()) {
+            throw new DataProcessingException("Movie not found with id: " + id);
+        }
+        return movie.get();
+    }
+}

src/main/java/mate/academy/util/HibernateUtil.java

@@ -0,0 +1,21 @@
+package mate.academy.util;
+
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+
+public class HibernateUtil {
+    private static final SessionFactory instance = initSessionFactory();
+
+    private HibernateUtil() {
+
+    }
+
+    private static SessionFactory initSessionFactory() {
+        return new Configuration().configure().buildSessionFactory();
+    }
+
+    public static SessionFactory getSessionFactory() {
+        return instance;
+    }
+
+}

src/main/resources/hibernate.cfg.xml

@@ -0,0 +1,15 @@
+<hibernate-configuration xmlns="http://www.hibernate.org/xsd/orm/cfg">
+    <session-factory>
+        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
+        <property name="connection.url">jdbc:mysql://localhost:3306/ticket_app?serverTimezone=UTC</property>
+        <property name="connection.driver_class">com.mysql.cj.jdbc.Driver</property>
+        <property name="connection.username">root</property>
+        <property name="connection.password">4321</property>
+        <property name="show_sql">true</property>
+        <property name="use_sql_comments">true</property>
+        <property name="format_sql">true</property>
+        <property name="hbm2ddl.auto">create-drop</property>
+
+        <mapping class="mate.academy.model.Movie"></mapping>
+    </session-factory>
+</hibernate-configuration>