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// $Id$
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/**
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* Copyright (C) 2014 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.api.service;
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import java.util.Arrays;
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import java.util.List;
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import java.util.UUID;
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import org.apache.log4j.Logger;
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import org.hibernate.LazyInitializationException;
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import org.junit.Assert;
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import org.junit.Ignore;
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import org.junit.Test;
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import org.unitils.database.annotations.Transactional;
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import org.unitils.database.util.TransactionMode;
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import org.unitils.dbunit.annotation.DataSet;
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import org.unitils.spring.annotation.SpringBeanByType;
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import eu.etaxonomy.cdm.model.agent.Person;
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import eu.etaxonomy.cdm.model.agent.Team;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.name.BotanicalName;
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import eu.etaxonomy.cdm.model.name.NonViralName;
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import eu.etaxonomy.cdm.model.taxon.Taxon;
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import eu.etaxonomy.cdm.test.integration.CdmIntegrationTest;
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/**
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* This test class tries to describe how hibernate works with objects (save, update, merge).
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*
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* @author cmathew
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* @date 17 Sep 2014
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*
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*/
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public class HandlingCdmEntitiesTest extends CdmIntegrationTest {
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private static final Logger logger = Logger.getLogger(CommonServiceImplTest.class);
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private static final String LIE_TEAMMEMBERS_NOSESSION = "failed to lazily initialize a collection of role: eu.etaxonomy.cdm.model.agent.Team.teamMembers, could not initialize proxy - no Session";
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private static final String LIE_NOSESSION = "could not initialize proxy - no Session";
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@SpringBeanByType
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private ITaxonService taxonService;
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@SpringBeanByType
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private IAgentService agentService;
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@SpringBeanByType
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private ICommonService commonService;
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public static final String[] includeTables = new String[]{
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"TAXONBASE",
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"TAXONNAMEBASE",
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"AGENTBASE",
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"AGENTBASE_AGENTBASE",
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"HOMOTYPICALGROUP"
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};
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@Ignore
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@Test
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@Transactional(TransactionMode.DISABLED)
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public final void createTestData() {
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Team combAuthor = Team.NewTitledInstance("Avengers", "Avengers");
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combAuthor.addTeamMember(Person.NewTitledInstance("Iron Man"));
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BotanicalName name = BotanicalName.NewInstance(null, "Abies alba", null, null, null, null, null, null, null);
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name.setCombinationAuthorTeam(combAuthor);
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Taxon taxon = Taxon.NewInstance(name, null);
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UUID taxonUuid = taxonService.save(taxon);
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printDataSetWithNull(System.out,false,null,includeTables);
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}
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@Test
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@DataSet
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@Transactional(TransactionMode.DISABLED)
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public void testNonTransactionalUpdateForExistingTaxon() {
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// this method tests the updating of a 'truely' detached object which
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// attempts to initialize a lazy loaded proxy object while trying to
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// update the same.
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// setting the TransactionMode for this method to DISABLED is important
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// to ensure that transaction boundaries remain at the service layer calls
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// to simulate detachment and update of the persisted object
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UUID taxonUuid = UUID.fromString("23c35977-01b5-452c-9225-ecce440034e0");
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// ---- loading taxon with find (uuid) ----
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Taxon taxon = (Taxon)taxonService.find(taxonUuid);
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have values of
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// initialized=false and session=null
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// since name is lazy loaded the call to getName should fail
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try {
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CdmBase.deproxy(taxon.getName(),NonViralName.class);
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Assert.fail("LazyInitializationException not thrown for lazy loaded Taxon.name");
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} catch(LazyInitializationException lie) {
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if(!lie.getMessage().equals(LIE_NOSESSION)) {
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Assert.fail("LazyInitializationException thrown, but not : " + LIE_NOSESSION);
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}
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}
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// ---- loading taxon with find (id) ----
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taxon = (Taxon)commonService.find(taxon.getClass(), taxon.getId());
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have values of
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// initialized=false and session=null
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// since name is lazy loaded the call to getName should fail
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try {
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CdmBase.deproxy(taxon.getName(),NonViralName.class);
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Assert.fail("LazyInitializationException not thrown for lazy loaded Taxon.name");
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} catch(LazyInitializationException lie) {
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if(!lie.getMessage().equals(LIE_NOSESSION)) {
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Assert.fail("LazyInitializationException thrown, but not : " + LIE_NOSESSION);
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}
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}
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// ---- loading taxon with findTaxonByUuid ----
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List<String> TAXON_INIT_STRATEGY = Arrays.asList(new String[] {
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"name"
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});
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// loading the taxon with its taxon name object pre-initialized
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taxon = (Taxon)taxonService.findTaxonByUuid(taxonUuid, TAXON_INIT_STRATEGY);
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have values of
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// initialized=false and session=null
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NonViralName nvn = CdmBase.deproxy(taxon.getName(),NonViralName.class);
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// normally this call should throw a lazy loading exception since
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// the combinationAuthorTeam object is not initialized, but
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// the findTaxonByUuid performs this initialization (via the
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// AdvancedBeanInitializer) since the combinationAuthorTeam
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// is annotated with CacheUpdate
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Team team = CdmBase.deproxy(nvn.getCombinationAuthorTeam(),Team.class);
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// setting the protected title cache to false to ensure that
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// TeamDefaultCacheStrategy.getTitleCache is called, which in turn tries
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// to initialize the teamMembers persistent collection which fails
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team.setProtectedTitleCache(false);
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try {
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taxonService.update(taxon);
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Assert.fail("LazyInitializationException not thrown for lazy loaded Team.teamMembers");
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} catch(LazyInitializationException lie) {
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if(!lie.getMessage().equals(LIE_TEAMMEMBERS_NOSESSION)) {
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Assert.fail("LazyInitializationException thrown, but not : " + LIE_TEAMMEMBERS_NOSESSION);
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}
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}
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// the above fails due to the fact that hibernate does not resolve lazy
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// loading on a detached object until the object is persisted. The attempt
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// to initialize teamMembers before the object graph is persisted means that
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// the current session is not yet attached to the proxy objects and hibernate
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// tries to use the existing session set in the teamMembers object which is
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// null, leading to the exception
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// setting the protected title cache to true to ensure that
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// TeamDefaultCacheStrategy.getTitleCache is not called, implying
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// that the teamMembers are not initialized, so no exception is thrown
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team.setProtectedTitleCache(true);
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taxonService.update(taxon);
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}
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@Test
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@DataSet
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public void testTransactionalUpdateAfterFindTaxonByUuidForExistingTaxon() {
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// this method tests the updating of a detached object inside a single
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// transaction.
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// this method is transactional, meaning that a transaction is started
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// at the start of the method and ends only with the end of the method
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// since this method is transactional, any object initialized within this method
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// will have a valid session attached to any lazy loaded proxy objects
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// in the object graph (including teamMembers)
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UUID taxonUuid = UUID.fromString("23c35977-01b5-452c-9225-ecce440034e0");
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// ---- loading taxon with find (uuid) ----
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Taxon taxon = (Taxon)taxonService.find(taxonUuid);
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have a new
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// session attached implying that all the following calls will succeed
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NonViralName nvn = CdmBase.deproxy(taxon.getName(),NonViralName.class);
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Team team = CdmBase.deproxy(nvn.getCombinationAuthorTeam(),Team.class);
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taxonService.update(taxon);
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// ---- loading taxon with find (id) ----
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taxon = (Taxon)commonService.find(taxon.getClass(), taxon.getId());
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have a new
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// session attached implying that all the following calls will succeed
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nvn = CdmBase.deproxy(taxon.getName(),NonViralName.class);
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team = CdmBase.deproxy(nvn.getCombinationAuthorTeam(),Team.class);
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taxonService.update(taxon);
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// ---- loading taxon with findTaxonByUuid ----
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List<String> TAXON_INIT_STRATEGY = Arrays.asList(new String[] {
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"name"
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});
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// loading the taxon with its taxon name object pre-initialized
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taxon = (Taxon)taxonService.findTaxonByUuid(taxonUuid, TAXON_INIT_STRATEGY);
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nvn = CdmBase.deproxy(taxon.getName(),NonViralName.class);
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team = CdmBase.deproxy(nvn.getCombinationAuthorTeam(),Team.class);
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// since a valid session is now attached to teamMembers, forcing the
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// initializing of the teamMembers (in TeamDefaultCacheStrategy.getTitleCache)
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// by setting the protected title cache to false does not throw an exception
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// because the teamMember persistent collection now has a valid session,
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// which is used to initialize the persistent collection
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team.setProtectedTitleCache(false);
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taxonService.update(taxon);
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}
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@Test
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@Transactional(TransactionMode.DISABLED)
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public void testNonTransactionalUpdateForNewTaxon() {
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// this test is only to prove that the update problem occurs
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// also for newly created objects (as expected)
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// create / save new taxon with name and author team with team member
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Team combAuthor = Team.NewTitledInstance("X-Men", "X-Men");
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combAuthor.addTeamMember(Person.NewTitledInstance("Wolverine"));
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BotanicalName name = BotanicalName.NewInstance(null, "Pinus Alba", null, null, null, null, null, null, null);
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name.setCombinationAuthorTeam(combAuthor);
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Taxon taxon = Taxon.NewInstance(name, null);
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UUID taxonUuid = taxonService.save(taxon);
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List<String> TAXON_INIT_STRATEGY = Arrays.asList(new String[] {
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"name"
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});
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taxon = (Taxon)taxonService.findTaxonByUuid(taxonUuid, TAXON_INIT_STRATEGY);
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NonViralName nvn = CdmBase.deproxy(taxon.getName(),NonViralName.class);
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Team team = CdmBase.deproxy(nvn.getCombinationAuthorTeam(),Team.class);
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team.setProtectedTitleCache(false);
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try {
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taxonService.update(taxon);
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Assert.fail("LazyInitializationException not thrown for lazy loaded Team.teamMembers");
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} catch(LazyInitializationException lie) {
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if(!lie.getMessage().equals(LIE_TEAMMEMBERS_NOSESSION)) {
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Assert.fail("LazyInitializationException thrown, but not : " + LIE_TEAMMEMBERS_NOSESSION);
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}
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}
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}
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@Test
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@DataSet
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@Transactional(TransactionMode.DISABLED)
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public void testNonTransactionalMergeForExistingTaxon() {
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// this method tests the updating of a 'truely' detached object
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// using merge
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// setting the TransactionMode for this method to DISABLED is important
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// to ensure that transaction boundaries remain at the service layer calls
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// to simulate detachment and update of the persisted object
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UUID taxonUuid = UUID.fromString("23c35977-01b5-452c-9225-ecce440034e0");
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// ---- loading taxon with find (uuid) ----
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Taxon taxon = (Taxon)taxonService.find(taxonUuid);
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have values of
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// initialized=false and session=null
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taxonService.merge(taxon);
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// ---- loading taxon with find (id) ----
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taxon = (Taxon)commonService.find(taxon.getClass(), taxon.getId());
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taxonService.merge(taxon);
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// ---- loading taxon with findTaxonByUuid ----
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List<String> TAXON_INIT_STRATEGY = Arrays.asList(new String[] {
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"name"
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});
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// loading the taxon with its taxon name object pre-initialized
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taxon = (Taxon)taxonService.findTaxonByUuid(taxonUuid, TAXON_INIT_STRATEGY);
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// at this point the taxonNew object is detached and all lazy loaded proxy
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// objects in the object graph (including teamMembers) will have values of
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// initialized=false and session=null
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NonViralName nvn = CdmBase.deproxy(taxon.getName(),NonViralName.class);
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// normally this call should throw a lazy loading exception since
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// the combinationAuthorTeam object is not initialized, but
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// the findTaxonByUuid performs this initialization (via the
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// AdvancedBeanInitializer) since the combinationAuthorTeam
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// is annotated with CacheUpdate
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Team team = CdmBase.deproxy(nvn.getCombinationAuthorTeam(),Team.class);
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// setting the protected title cache to false to ensure that
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// TeamDefaultCacheStrategy.getTitleCache is called, which in turn tries
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// to initialize the teamMembers persistent collection which fails
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team.setProtectedTitleCache(false);
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taxonService.merge(taxon);
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}
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}
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