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HHH-7669 - Oracle sequences ordered

This commit is contained in:
Lukasz Antoniak 2012-10-30 09:24:51 +01:00
parent 44ea0b9feb
commit 73bae00c1c
4 changed files with 63 additions and 2 deletions
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2
hibernate-envers/src/main/java/org/hibernate/envers/configuration/metadata/MetadataTools.java
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@ -49,7 +49,7 @@ public class MetadataTools {
if (useRevisionEntityWithNativeId) {
generator_mapping.addAttribute("class", "native");
} else {
generator_mapping.addAttribute("class", "org.hibernate.id.enhanced.SequenceStyleGenerator");
generator_mapping.addAttribute("class", "org.hibernate.envers.enhanced.OrderedSequenceGenerator");
generator_mapping.addElement("param").addAttribute("name", "sequence_name").setText("REVISION_GENERATOR");
generator_mapping.addElement("param").addAttribute("name", "table_name").setText("REVISION_GENERATOR");
generator_mapping.addElement("param").addAttribute("name", "initial_value").setText("1");

23
hibernate-envers/src/main/java/org/hibernate/envers/enhanced/OrderedSequenceGenerator.java Normal file
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@ -0,0 +1,23 @@
package org.hibernate.envers.enhanced;
import org.hibernate.HibernateException;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.Oracle8iDialect;
import org.hibernate.id.enhanced.SequenceStyleGenerator;
import org.hibernate.internal.util.StringHelper;
/**
* Revision number generator has to produce values in ascending order (gaps may occur).
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
public class OrderedSequenceGenerator extends SequenceStyleGenerator {
@Override
public String[] sqlCreateStrings(Dialect dialect) throws HibernateException {
String[] create = super.sqlCreateStrings( dialect );
if ( dialect instanceof Oracle8iDialect ) {
// Make sure that sequence produces increasing values in Oracle RAC environment.
create = StringHelper.suffix( create, " order" );
}
return create;
}
}

2
hibernate-envers/src/main/java/org/hibernate/envers/enhanced/SequenceIdRevisionEntity.java
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@ -47,7 +47,7 @@ public class SequenceIdRevisionEntity implements Serializable {
@Id
@GeneratedValue(generator = "RevisionNumberSequenceGenerator")
@GenericGenerator(name = "RevisionNumberSequenceGenerator",
strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator",
strategy = "org.hibernate.envers.enhanced.OrderedSequenceGenerator",
parameters = {@Parameter(name = "table_name", value = "REVISION_GENERATOR"),
@Parameter(name = "sequence_name", value = "REVISION_GENERATOR"),
@Parameter(name = "initial_value", value = "1"),

38
hibernate-envers/src/test/java/org/hibernate/envers/test/integration/reventity/MonotonicRevisionNumberTest.java Normal file
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@ -0,0 +1,38 @@
package org.hibernate.envers.test.integration.reventity;
import org.junit.Assert;
import org.junit.Test;
import org.hibernate.dialect.Oracle8iDialect;
import org.hibernate.envers.enhanced.OrderedSequenceGenerator;
import org.hibernate.envers.enhanced.SequenceIdRevisionEntity;
import org.hibernate.envers.test.BaseEnversFunctionalTestCase;
import org.hibernate.envers.test.entities.StrIntTestEntity;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.testing.RequiresDialect;
import org.hibernate.testing.TestForIssue;
/**
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
@TestForIssue(jiraKey = "HHH-7669")
@RequiresDialect(Oracle8iDialect.class)
public class MonotonicRevisionNumberTest extends BaseEnversFunctionalTestCase {
@Override
protected Class<?>[] getAnnotatedClasses() {
return new Class<?>[]{ StrIntTestEntity.class }; // Otherwise revision entity is not generated.
}
@Test
public void testOracleSequenceOrder() {
EntityPersister persister = sessionFactory().getEntityPersister( SequenceIdRevisionEntity.class.getName() );
IdentifierGenerator generator = persister.getIdentifierGenerator();
Assert.assertTrue( OrderedSequenceGenerator.class.isInstance( generator ) );
OrderedSequenceGenerator seqGenerator = (OrderedSequenceGenerator) generator;
Assert.assertTrue(
"Oracle sequence needs to be ordered in RAC environment.",
seqGenerator.sqlCreateStrings( getDialect() )[0].endsWith( " order" )
);
}
}