[BAEL-4635] Tests for JPA Transient Annotation tutorial

persistence-modules/java-jpa-3/src/main/java/com/baeldung/ignorable/fields/HibernateConfig.java

@@ -0,0 +1,40 @@
+package com.baeldung.ignorable.fields;
+
+import java.util.Properties;
+
+import org.hibernate.SessionFactory;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.cfg.Configuration;
+import org.hibernate.cfg.Environment;
+import org.hibernate.service.ServiceRegistry;
+
+public class HibernateConfig {
+    private static SessionFactory sessionFactory;
+
+    public static SessionFactory getSessionFactory() {
+        if (sessionFactory == null) {
+            try {
+                Configuration configuration = new Configuration();
+
+                Properties settings = new Properties();
+                settings.put(Environment.DRIVER, "com.mysql.cj.jdbc.Driver");
+                settings.put(Environment.URL, "jdbc:mysql://localhost:3306/app_db?useSSL=false");
+                settings.put(Environment.USER, "root");
+                settings.put(Environment.PASS, "password");
+                settings.put(Environment.DIALECT, "org.hibernate.dialect.MySQL5Dialect");
+                settings.put(Environment.CURRENT_SESSION_CONTEXT_CLASS, "thread");
+                configuration.setProperties(settings);
+
+                configuration.addAnnotatedClass(User.class);
+
+                ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties())
+                    .build();
+
+                sessionFactory = configuration.buildSessionFactory(serviceRegistry);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        return sessionFactory;
+    }
+}

persistence-modules/java-jpa-3/src/main/java/com/baeldung/ignorable/fields/User.java

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+package com.baeldung.ignorable.fields;
+
+import java.io.Serializable;
+import java.util.StringJoiner;
+
+import javax.persistence.*;
+
+@Entity
+@Table(name = "Users")
+public class User implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+    private String email;
+    private String password;
+    @Transient
+    private String currentDevice;
+
+    // Needed for Hibernate mapping
+    public User() {
+    }
+
+    public User(String email, String password, String currentDevice) {
+        this.email = email;
+        this.password = password;
+        this.currentDevice = currentDevice;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public String getCurrentDevice() {
+        return currentDevice;
+    }
+
+    public void setCurrentDevice(String currentDevice) {
+        this.currentDevice = currentDevice;
+    }
+
+    @Override
+    public String toString() {
+        return new StringJoiner(", ", User.class.getSimpleName() + "[", "]").add("id=" + id)
+            .add("email='" + email + "'")
+            .add("password='" + password + "'")
+            .add("currentDevice='" + currentDevice + "'")
+            .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+        if (!(o instanceof User))
+            return false;
+        User user = (User) o;
+        return email.equals(user.email);
+    }
+}

persistence-modules/java-jpa-3/src/main/java/com/baeldung/ignorable/fields/UserDao.java

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+package com.baeldung.ignorable.fields;
+
+import java.util.List;
+
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+
+public class UserDao {
+
+    public void saveUser(User user) {
+        Transaction transaction = null;
+        try (Session session = HibernateConfig.getSessionFactory()
+            .openSession()) {
+            transaction = session.beginTransaction();
+            session.save(user);
+            transaction.commit();
+        } catch (Exception e) {
+            e.printStackTrace();
+            if (transaction != null) {
+                transaction.rollback();
+            }
+        }
+    }
+
+    public List<User> getUsers() {
+        try (Session session = HibernateConfig.getSessionFactory()
+            .openSession()) {
+            return session.createQuery("from User", User.class)
+                .list();
+        }
+    }
+}