HHH-13592 Test AutoFlushEvent#isFlushRequired

hibernate-core/src/test/java/org/hibernate/test/events/AutoFlushEventListenerTest.java

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+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.test.events;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+import org.hibernate.FlushMode;
+import org.hibernate.HibernateException;
+import org.hibernate.Session;
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.registry.BootstrapServiceRegistryBuilder;
+import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.event.service.spi.EventListenerRegistry;
+import org.hibernate.event.spi.AutoFlushEvent;
+import org.hibernate.event.spi.AutoFlushEventListener;
+import org.hibernate.event.spi.EventType;
+import org.hibernate.integrator.spi.Integrator;
+import org.hibernate.service.spi.SessionFactoryServiceRegistry;
+
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class AutoFlushEventListenerTest extends BaseCoreFunctionalTestCase {
+
+	private TheListener listener = new TheListener();
+
+	@Test
+	public void testAutoFlushRequired() {
+		listener.events.clear();
+
+		Session s = openSession();
+		s.beginTransaction();
+
+		s.persist( new Entity1() );
+		assertEquals( 0, listener.events.size() );
+
+		// An entity of this type was persisted; a flush is required
+		session.createQuery( "select i from Entity1 i" )
+				.setHibernateFlushMode( FlushMode.AUTO )
+				.getResultList();
+		assertEquals( 1, listener.events.size() );
+		assertTrue( listener.events.get( 0 ).isFlushRequired() );
+
+		s.getTransaction().commit();
+		assertEquals( 1, listener.events.size() );
+		s.close();
+		assertEquals( 1, listener.events.size() );
+	}
+
+	@Test
+	public void testAutoFlushNotRequired() {
+		listener.events.clear();
+
+		Session s = openSession();
+		s.beginTransaction();
+
+		s.persist( new Entity2() );
+		assertEquals( 0, listener.events.size() );
+
+		// No entity of this type was persisted; no flush is required
+		session.createQuery( "select i from Entity1 i" )
+				.setHibernateFlushMode( FlushMode.AUTO )
+				.getResultList();
+		assertEquals( 1, listener.events.size() );
+		assertFalse( listener.events.get( 0 ).isFlushRequired() );
+
+		s.getTransaction().commit();
+		assertEquals( 1, listener.events.size() );
+		s.close();
+		assertEquals( 1, listener.events.size() );
+	}
+
+	@Override
+	protected void prepareBootstrapRegistryBuilder(BootstrapServiceRegistryBuilder builder) {
+		super.prepareBootstrapRegistryBuilder( builder );
+		builder.applyIntegrator(
+				new Integrator() {
+					@Override
+					public void integrate(
+							Metadata metadata,
+							SessionFactoryImplementor sessionFactory,
+							SessionFactoryServiceRegistry serviceRegistry) {
+						serviceRegistry.getService( EventListenerRegistry.class ).appendListeners(
+								EventType.AUTO_FLUSH,
+								listener
+						);
+					}
+
+					@Override
+					public void disintegrate(SessionFactoryImplementor sessionFactory,
+							SessionFactoryServiceRegistry serviceRegistry) {
+					}
+				}
+		);
+	}
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] { Entity1.class, Entity2.class };
+	}
+
+	@Entity(name = "Entity1")
+	static class Entity1 {
+		@Id
+		@GeneratedValue
+		private Integer id;
+
+		public Entity1() {
+		}
+	}
+
+	@Entity(name = "Entity2")
+	static class Entity2 {
+		@Id
+		@GeneratedValue
+		private Integer id;
+
+		public Entity2() {
+		}
+	}
+
+	private static class TheListener implements AutoFlushEventListener {
+		private List<AutoFlushEvent> events = new ArrayList<>();
+
+		@Override
+		public void onAutoFlush(AutoFlushEvent event) throws HibernateException {
+			events.add( event );
+		}
+	}
+}