HHH-8280 - Identifiers reuse option
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@ -326,6 +326,19 @@
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Name of column used for storing ordinal of the change in sets of embeddable elements.
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</entry>
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</row>
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<row>
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<entry>
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<property>org.hibernate.envers.allow_identifier_reuse</property>
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</entry>
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<entry>
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false
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</entry>
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<entry>
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Guarantees proper validity audit strategy behavior when application reuses identifiers
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of deleted entities. Exactly one row with <literal>null</literal> end date exists
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for each identifier.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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@ -125,4 +125,10 @@ public interface EnversSettings {
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* Name of column used for storing ordinal of the change in sets of embeddable elements. Defaults to {@literal SETORDINAL}.
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*/
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public static final String EMBEDDABLE_SET_ORDINAL_FIELD_NAME = "org.hibernate.envers.embeddable_set_ordinal_field_name";
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/**
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* Guarantees proper validity audit strategy behavior when application reuses identifiers of deleted entities.
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* Exactly one row with {@code null} end date exists for each identifier.
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*/
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public static final String ALLOW_IDENTIFIER_REUSE = "org.hibernate.envers.allow_identifier_reuse";
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}
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@ -75,12 +75,15 @@ public class GlobalConfiguration {
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// Use revision entity with native id generator
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private final boolean useRevisionEntityWithNativeId;
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// Support reused identifiers of previously deleted entities
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private final boolean allowIdentifierReuse;
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/*
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Which operator to use in correlated subqueries (when we want a property to be equal to the result of
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a correlated subquery, for example: e.p <operator> (select max(e2.p) where e2.p2 = e.p2 ...).
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Normally, this should be "=". However, HSQLDB has an issue related to that, so as a workaround,
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"in" is used. See {@link org.hibernate.envers.test.various.HsqlTest}.
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*/
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*/
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private final String correlatedSubqueryOperator;
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public GlobalConfiguration(Properties properties, ClassLoaderService classLoaderService) {
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@ -131,6 +134,10 @@ public class GlobalConfiguration {
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else {
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revisionListenerClass = null;
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}
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allowIdentifierReuse = ConfigurationHelper.getBoolean(
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EnversSettings.ALLOW_IDENTIFIER_REUSE, properties, false
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);
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}
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public boolean isGenerateRevisionsForCollections() {
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@ -184,4 +191,8 @@ public class GlobalConfiguration {
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public boolean isUseRevisionEntityWithNativeId() {
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return useRevisionEntityWithNativeId;
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}
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public boolean isAllowIdentifierReuse() {
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return allowIdentifierReuse;
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}
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}
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@ -100,10 +100,13 @@ public class ValidityAuditStrategy implements AuditStrategy {
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// Update the end date of the previous row.
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//
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// The statement will no-op if an entity with a given identifier has been
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// When application reuses identifiers of previously removed entities:
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// The UPDATE statement will no-op if an entity with a given identifier has been
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// inserted for the first time. But in case a deleted primary key value was
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// reused, this guarantees correct strategy behavior: exactly one row with
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// a null end date exists for each identifier.
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// null end date exists for each identifier.
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final boolean reuseEntityIdentifier = auditCfg.getGlobalCfg().isAllowIdentifierReuse();
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if ( reuseEntityIdentifier || getRevisionType( auditCfg, data ) != RevisionType.ADD ) {
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final Queryable productionEntityQueryable = getQueryable( entityName, sessionImplementor );
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final Queryable rootProductionEntityQueryable = getQueryable(
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productionEntityQueryable.getRootEntityName(),
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@ -242,11 +245,12 @@ public class ValidityAuditStrategy implements AuditStrategy {
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}
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);
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if ( rowCount != 1 && getRevisionType(auditCfg, data) != RevisionType.ADD ) {
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if ( rowCount != 1 && ( !reuseEntityIdentifier || ( getRevisionType( auditCfg, data ) != RevisionType.ADD ) ) ) {
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throw new RuntimeException(
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"Cannot update previous revision for entity " + auditedEntityName + " and id " + id
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);
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}
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}
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}
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private Queryable getQueryable(String entityName, SessionImplementor sessionImplementor) {
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@ -0,0 +1,73 @@
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package org.hibernate.envers.test.integration.strategy;
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import javax.persistence.EntityManager;
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import javax.persistence.EntityTransaction;
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import java.util.Arrays;
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import java.util.Map;
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import org.hibernate.envers.configuration.EnversSettings;
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import org.hibernate.envers.test.BaseEnversJPAFunctionalTestCase;
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import org.hibernate.envers.test.entities.IntNoAutoIdTestEntity;
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import org.junit.Test;
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import org.hibernate.testing.TestForIssue;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotNull;
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/**
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* Tests that reusing identifiers doesn't cause auditing misbehavior.
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*
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* @author adar
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*/
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@TestForIssue(jiraKey = "HHH-8280")
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public class IdentifierReuseTest extends BaseEnversJPAFunctionalTestCase {
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@Override
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protected void addConfigOptions(Map options) {
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options.put( EnversSettings.ALLOW_IDENTIFIER_REUSE, "true" );
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}
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@Override
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protected Class<?>[] getAnnotatedClasses() {
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return new Class[] { IntNoAutoIdTestEntity.class };
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}
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@Test
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public void testIdentifierReuse() {
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final Integer reusedId = 1;
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EntityManager entityManager = getEntityManager();
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saveUpdateAndRemoveEntity( entityManager, reusedId );
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saveUpdateAndRemoveEntity( entityManager, reusedId );
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entityManager.close();
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assertEquals(
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Arrays.asList( 1, 2, 3, 4, 5, 6 ),
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getAuditReader().getRevisions( IntNoAutoIdTestEntity.class, reusedId )
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);
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}
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private void saveUpdateAndRemoveEntity(EntityManager entityManager, Integer id) {
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EntityTransaction transaction = entityManager.getTransaction();
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transaction.begin();
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IntNoAutoIdTestEntity entity = new IntNoAutoIdTestEntity( 0, id );
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entityManager.persist( entity );
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assertEquals( id, entity.getId() );
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transaction.commit();
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transaction.begin();
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entity = entityManager.find( IntNoAutoIdTestEntity.class, id );
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entity.setNumVal( 1 );
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entity = entityManager.merge( entity );
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assertEquals( id, entity.getId() );
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transaction.commit();
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transaction.begin();
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entity = entityManager.find( IntNoAutoIdTestEntity.class, id );
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assertNotNull( entity );
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entityManager.remove( entity );
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transaction.commit();
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}
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}
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@ -1,67 +0,0 @@
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package org.hibernate.envers.test.integration.strategy;
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import static org.junit.Assert.*;
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import java.util.Map;
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import javax.persistence.EntityManager;
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import javax.persistence.EntityTransaction;
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import org.hibernate.envers.configuration.EnversSettings;
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import org.hibernate.envers.test.BaseEnversJPAFunctionalTestCase;
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import org.hibernate.envers.test.entities.IntNoAutoIdTestEntity;
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import org.hibernate.testing.TestForIssue;
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import org.junit.Test;
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/**
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* Tests that reusing identifiers doesn't cause {@link ValidityAuditstrategy}
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* to misbehave.
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*
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* @author adar
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*
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*/
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@TestForIssue(jiraKey = "HHH-8280")
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public class ValidityAuditStrategyIdentifierReuseTest extends
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BaseEnversJPAFunctionalTestCase {
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@SuppressWarnings({ "rawtypes", "unchecked" })
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@Override
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protected void addConfigOptions(Map options) {
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options.put(EnversSettings.AUDIT_STRATEGY,
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"org.hibernate.envers.strategy.ValidityAuditStrategy");
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}
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@Override
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protected Class<?>[] getAnnotatedClasses() {
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return new Class[] { IntNoAutoIdTestEntity.class };
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}
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private void saveRemoveEntity(EntityManager em, Integer id) {
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EntityTransaction et = em.getTransaction();
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et.begin();
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IntNoAutoIdTestEntity e = new IntNoAutoIdTestEntity(0, id);
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em.persist(e);
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assertEquals(id, e.getId());
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et.commit();
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et.begin();
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e = em.find(IntNoAutoIdTestEntity.class, id);
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assertNotNull(e);
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em.remove(e);
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et.commit();
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}
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@Test
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public void testValidityAuditStrategyDoesntThrowWhenIdentifierIsReused() {
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final Integer reusedID = 1;
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EntityManager em = getEntityManager();
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try {
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saveRemoveEntity(em, reusedID);
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saveRemoveEntity(em, reusedID);
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} finally {
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em.close();
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}
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}
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}
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