package hibernate;
import java.util.*;
import org.hibernate.*;
public class HibernateGames {
    public static void main(String[] args) {

        //main transaction
        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction tx = session.beginTransaction();
        Message loaded = (Message) session.get(Message.class, 21l);
        session.lock(loaded, LockMode.PESSIMISTIC_WRITE);

        //concurrent transaction
        Session session2 = HibernateUtil.getSessionFactory().openSession();
        Transaction tx2 = session2.beginTransaction();
        Message loaded2 = (Message) session2.get(Message.class, 21l);
        tx2.commit();
        session2.close();

        //main transaction committed
        Message loadedAtLast = (Message) session.get(Message.class, 21l);
        tx.commit();
        session.close();

        HibernateUtil.shutdown():
    }
}