Refactor Hibernate5 examples (#1362)

spring-hibernate5/pom.xml

@@ -148,7 +148,6 @@
             <groupId>org.hsqldb</groupId>
             <artifactId>hsqldb</artifactId>
             <version>${hsqldb.version}</version>
-            <scope>test</scope>
         </dependency>
 
     </dependencies>

spring-hibernate5/src/main/java/com/baeldung/hibernate/immutable/util/HibernateUtil.java

@@ -1,5 +1,6 @@
 package com.baeldung.hibernate.immutable.util;
 
+import com.baeldung.hibernate.immutable.entities.Event;
 import org.hibernate.SessionFactory;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 import org.hibernate.cfg.Configuration;
@@ -12,6 +13,7 @@ public class HibernateUtil {
         try {
             // Create a session factory from immutable.cfg.xml
             Configuration configuration = new Configuration();
+            configuration.addAnnotatedClass(Event.class);
             configuration.configure("immutable.cfg.xml");
             ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
               .applySettings(configuration.getProperties())

spring-hibernate5/src/main/resources/immutable.cfg.xml

@@ -0,0 +1,32 @@
+<?xml version='1.0' encoding='utf-8'?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+
+<hibernate-configuration>
+
+    <session-factory>
+
+        <!-- Database connection settings -->
+        <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
+        <property name="connection.url">jdbc:hsqldb:mem:test</property>
+        <property name="connection.username">sa</property>
+        <property name="connection.password"></property>
+
+        <!-- JDBC connection pool (use the built-in) -->
+        <property name="connection.pool_size">1</property>
+
+        <!-- SQL dialect -->
+        <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
+
+        <!-- Enable Hibernate's automatic session context management -->
+        <property name="current_session_context_class">thread</property>
+
+        <!-- Echo all executed SQL to stdout -->
+        <property name="show_sql">true</property>
+
+        <!-- Drop and re-create the database schema on startup -->
+        <property name="hbm2ddl.auto">update</property>
+    </session-factory>
+
+</hibernate-configuration>

spring-hibernate5/src/test/java/com/baeldung/hibernate/immutable/HibernateImmutableIntegrationTest.java

@@ -2,30 +2,36 @@ package com.baeldung.hibernate.immutable;
 
 import com.baeldung.hibernate.immutable.entities.Event;
 import com.baeldung.hibernate.immutable.util.HibernateUtil;
-import org.hibernate.HibernateException;
+import com.google.common.collect.Sets;
+import org.hibernate.CacheMode;
 import org.hibernate.Session;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.*;
 import org.junit.rules.ExpectedException;
 
+import javax.persistence.PersistenceException;
+
 public class HibernateImmutableIntegrationTest {
 
-    private Session session;
+    private static Session session;
 
     @Rule
     public final ExpectedException exception = ExpectedException.none();
 
     @Before
-    public void setup() {
+    public void before() {
         session = HibernateUtil.getSessionFactory().getCurrentSession();
         session.beginTransaction();
         createEvent();
+        session.setCacheMode(CacheMode.REFRESH);
     }
 
-    @After
-    public void teardown() {
+    @BeforeClass
+    public static void setup() {
+        session = HibernateUtil.getSessionFactory().getCurrentSession();
+    }
+
+    @AfterClass
+    public static void teardown() {
         HibernateUtil.getSessionFactory().close();
     }
 
@@ -40,7 +46,7 @@ public class HibernateImmutableIntegrationTest {
     @Test
     public void updateEvent() {
         Event event = (Event) session.createQuery(
-                "FROM Event WHERE title='My Event'").list().get(0);
+                "FROM Event WHERE title='New Event'").list().get(0);
         event.setTitle("Private Event");
         session.saveOrUpdate(event);
         session.getTransaction().commit();
@@ -49,7 +55,7 @@ public class HibernateImmutableIntegrationTest {
     @Test
     public void deleteEvent() {
         Event event = (Event) session.createQuery(
-                "FROM Event WHERE title='My Event'").list().get(0);
+                "FROM Event WHERE title='New Event'").list().get(0);
         session.delete(event);
         session.getTransaction().commit();
     }
@@ -61,7 +67,7 @@ public class HibernateImmutableIntegrationTest {
         String newGuest = "Sara";
         event.getGuestList().add(newGuest);
 
-        exception.expect(HibernateException.class);
+        exception.expect(PersistenceException.class);
         session.save(event);
         session.getTransaction().commit();
     }
@@ -73,14 +79,15 @@ public class HibernateImmutableIntegrationTest {
         String guest = event.getGuestList().iterator().next();
         event.getGuestList().remove(guest);
 
-        exception.expect(HibernateException.class);
+        exception.expect(PersistenceException.class);
         session.saveOrUpdate(event);
         session.getTransaction().commit();
     }
 
-    public void createEvent() {
+    public static void createEvent() {
         Event event = new Event();
         event.setTitle("New Event");
+        event.setGuestList(Sets.newHashSet("guest"));
         session.save(event);
     }
 }