Hibernate und JPA

<?xml version="1.0" encoding="UTF-8"?>
        <project xmlns="http://maven.apache.org/POM/4.0.0"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
            <modelVersion>4.0.0</modelVersion>
            <parent>
                <groupId>at.aydin.academy</groupId>
                <artifactId>23hibernatejpa-pair</artifactId>
                <version>1.0.0</version>
                <relativePath>../pom.xml</relativePath>
            </parent>
            <artifactId>hibernate-native-legacy</artifactId>
            <packaging>jar</packaging>
            <name>Hibernate Native Legacy</name>

            <dependencies>

<dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>5.6.15.Final</version></dependency>
<dependency><groupId>javax.persistence</groupId><artifactId>javax.persistence-api</artifactId><version>2.2</version></dependency>
<dependency><groupId>com.h2database</groupId><artifactId>h2</artifactId></dependency>
<dependency><groupId>org.slf4j</groupId><artifactId>slf4j-simple</artifactId><version>2.0.17</version></dependency>

<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter</artifactId>
    <scope>test</scope>
</dependency>

            </dependencies>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-compiler-plugin</artifactId>
                    </plugin>

                </plugins>
            </build>
        </project>

package at.aydin.lab.hibernate.legacy;

import javax.persistence.*;

@Entity
@Table(name = "book")
public class LegacyBook {
    @Id
    @GeneratedValue
    private Long id;
    private String title;
    protected LegacyBook() {
    }

    public LegacyBook(String title) {
        this.title = title;
    }

    public Long getId() {
        return id;
    }

    public String getTitle() {
        return title;
    }
}

package at.aydin.lab.hibernate.legacy;

import org.hibernate.*;
import org.hibernate.cfg.Configuration;
import java.util.*;

// Design Pattern: Unit of Work
// Zweck: Hibernate Session und Transaction bilden eine explizite Arbeitseinheit.
public final class HibernateBookStore implements AutoCloseable {
    private final SessionFactory factory = new Configuration().addAnnotatedClass(LegacyBook.class).setProperty("hibernate.connection.url",
        "jdbc:h2:mem:hibernatelegacy;DB_CLOSE_DELAY=-1").setProperty("hibernate.connection.driver_class", "org.h2.Driver")
            .setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect").setProperty("hibernate.hbm2ddl.auto", "create-drop")
            .buildSessionFactory();
    public Long save(String title) {
        try (Session s = factory.openSession()) {
            Transaction tx = s.beginTransaction();
            Long id = (Long) s.save(new LegacyBook(title));
            tx.commit();
            return id;
        }
    }

    public Optional<LegacyBook> find(Long id) {
        try (Session s = factory.openSession()) {
            return Optional.ofNullable(s.get(LegacyBook.class, id));
        }
    }

    public void close() {
        factory.close();
    }
}

package at.aydin.lab.hibernate.legacy;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;

class HibernateBookStoreTest {
    @Test
    void storesWithNativeSession() {
        try (var store = new HibernateBookStore()) {
            Long id = store.save("Java");
            assertEquals("Java", store.find(id).orElseThrow().getTitle());
        }
    }
}