Hibernate example source code file (OneToManyCache.java)

This example Hibernate source code file (OneToManyCache.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

abstractentitytest, entitymanager, integer, integer, objectequality, onetomanycache, priority, setrefedentity, setrefedentity, setrefingentity, setrefingentity, suppresswarnings, test, test

The Hibernate OneToManyCache.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.envers.test.integration.cache;

import org.hibernate.ejb.Ejb3Configuration;
import org.hibernate.envers.test.AbstractEntityTest;
import org.hibernate.envers.test.Priority;
import org.hibernate.envers.test.entities.onetomany.SetRefEdEntity;
import org.hibernate.envers.test.entities.onetomany.SetRefIngEntity;
import org.junit.Test;

import javax.persistence.EntityManager;

/**
 * @author Adam Warski (adam at warski dot org)
 */
@SuppressWarnings({"ObjectEquality"})
public class OneToManyCache extends AbstractEntityTest {
    private Integer ed1_id;
    private Integer ed2_id;

    private Integer ing1_id;
    private Integer ing2_id;

    public void configure(Ejb3Configuration cfg) {
        cfg.addAnnotatedClass(SetRefEdEntity.class);
        cfg.addAnnotatedClass(SetRefIngEntity.class);
    }

    @Test
    @Priority(10)
    public void initData() {
        EntityManager em = getEntityManager();

        SetRefEdEntity ed1 = new SetRefEdEntity(1, "data_ed_1");
        SetRefEdEntity ed2 = new SetRefEdEntity(2, "data_ed_2");

        SetRefIngEntity ing1 = new SetRefIngEntity(1, "data_ing_1");
        SetRefIngEntity ing2 = new SetRefIngEntity(2, "data_ing_2");

        // Revision 1
        em.getTransaction().begin();

        em.persist(ed1);
        em.persist(ed2);

        ing1.setReference(ed1);
        ing2.setReference(ed1);

        em.persist(ing1);
        em.persist(ing2);

        em.getTransaction().commit();

        // Revision 2
        em.getTransaction().begin();

        ing1 = em.find(SetRefIngEntity.class, ing1.getId());
        ing2 = em.find(SetRefIngEntity.class, ing2.getId());
        ed2 = em.find(SetRefEdEntity.class, ed2.getId());

        ing1.setReference(ed2);
        ing2.setReference(ed2);

        em.getTransaction().commit();

        //

        ed1_id = ed1.getId();
        ed2_id = ed2.getId();

        ing1_id = ing1.getId();
        ing2_id = ing2.getId();
    }

    @Test
    public void testCacheReferenceAccessAfterFind() {
        SetRefEdEntity ed1_rev1 = getAuditReader().find(SetRefEdEntity.class, ed1_id, 1);

        SetRefIngEntity ing1_rev1 = getAuditReader().find(SetRefIngEntity.class, ing1_id, 1);
        SetRefIngEntity ing2_rev1 = getAuditReader().find(SetRefIngEntity.class, ing2_id, 1);

        // It should be exactly the same object
        assert ing1_rev1.getReference() == ed1_rev1;
        assert ing2_rev1.getReference() == ed1_rev1;
    }

    @Test
    public void testCacheReferenceAccessAfterCollectionAccessRev1() {
        SetRefEdEntity ed1_rev1 = getAuditReader().find(SetRefEdEntity.class, ed1_id, 1);

        // It should be exactly the same object
        assert ed1_rev1.getReffering().size() == 2;
        for (SetRefIngEntity setRefIngEntity : ed1_rev1.getReffering()) {
            assert setRefIngEntity.getReference() == ed1_rev1;
        }
    }

    @Test
    public void testCacheReferenceAccessAfterCollectionAccessRev2() {
        SetRefEdEntity ed2_rev2 = getAuditReader().find(SetRefEdEntity.class, ed2_id, 2);

        assert ed2_rev2.getReffering().size() == 2;
        for (SetRefIngEntity setRefIngEntity : ed2_rev2.getReffering()) {
            assert setRefIngEntity.getReference() == ed2_rev2;
        }
    }

    @Test
    public void testCacheFindAfterCollectionAccessRev1() {
        SetRefEdEntity ed1_rev1 = getAuditReader().find(SetRefEdEntity.class, ed1_id, 1);

        // Reading the collection
        assert ed1_rev1.getReffering().size() == 2;

        SetRefIngEntity ing1_rev1 = getAuditReader().find(SetRefIngEntity.class, ing1_id, 1);
        SetRefIngEntity ing2_rev1 = getAuditReader().find(SetRefIngEntity.class, ing2_id, 1);

        for (SetRefIngEntity setRefIngEntity : ed1_rev1.getReffering()) {
            assert setRefIngEntity == ing1_rev1 || setRefIngEntity == ing2_rev1;
        }
    }
}