/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.orm.jpa.vendor;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.spi.PersistenceProvider;
import org.hibernate.cfg.AvailableSettings;
import org.hibernate.dialect.DB2Dialect;
import org.hibernate.dialect.DerbyTenSevenDialect;
import org.hibernate.dialect.H2Dialect;
import org.hibernate.dialect.HSQLDialect;
import org.hibernate.dialect.InformixDialect;
import org.hibernate.dialect.MySQL5Dialect;
import org.hibernate.dialect.Oracle12cDialect;
import org.hibernate.dialect.PostgreSQL95Dialect;
import org.hibernate.dialect.SQLServer2012Dialect;
import org.hibernate.dialect.SybaseDialect;
/**
* {@link org.springframework.orm.jpa.JpaVendorAdapter} implementation for Hibernate
* EntityManager. Developed and tested against Hibernate 5.0, 5.1 and 5.2;
* backwards-compatible with Hibernate 4.3 at runtime on a best-effort basis.
*
* <p>Exposes Hibernate's persistence provider and EntityManager extension interface,
* and adapts {@link AbstractJpaVendorAdapter}'s common configuration settings.
* Also supports the detection of annotated packages (through
* {@link org.springframework.orm.jpa.persistenceunit.SmartPersistenceUnitInfo#getManagedPackages()}),
* e.g. containing Hibernate {@link org.hibernate.annotations.FilterDef} annotations,
* along with Spring-driven entity scanning which requires no {@code persistence.xml}
* ({@link org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean#setPackagesToScan}).
*
* @author Juergen Hoeller
* @author Rod Johnson
* @since 2.0
* @see HibernateJpaDialect
*/
public class HibernateJpaVendorAdapter extends AbstractJpaVendorAdapter {
private final HibernateJpaDialect jpaDialect = new HibernateJpaDialect();
private final PersistenceProvider persistenceProvider;
private final Class<? extends EntityManagerFactory> entityManagerFactoryInterface;
private final Class<? extends EntityManager> entityManagerInterface;
@SuppressWarnings("deprecation")
public HibernateJpaVendorAdapter() {
this.persistenceProvider = new SpringHibernateJpaPersistenceProvider();
this.entityManagerFactoryInterface = org.hibernate.jpa.HibernateEntityManagerFactory.class;
this.entityManagerInterface = org.hibernate.jpa.HibernateEntityManager.class;
}
/**
* Set whether to prepare the underlying JDBC Connection of a transactional
* Hibernate Session, that is, whether to apply a transaction-specific
* isolation level and/or the transaction's read-only flag to the underlying
* JDBC Connection.
* <p>See {@link HibernateJpaDialect#setPrepareConnection(boolean)} for details.
* This is just a convenience flag passed through to {@code HibernateJpaDialect}.
* <p>On Hibernate 5.1/5.2, this flag remains {@code true} by default like against
* previous Hibernate versions. The vendor adapter manually enforces Hibernate's
* new connection handling mode {@code DELAYED_ACQUISITION_AND_HOLD} in that case
* unless a user-specified connection handling mode property indicates otherwise;
* switch this flag to {@code false} to avoid that interference.
* <p><b>NOTE: Per the explanation above, you may have to turn this flag off
* when using Hibernate in a JTA environment, e.g. on WebLogic.</b> Alternatively,
* set Hibernate 5.2's "hibernate.connection.handling_mode" property to
* "DELAYED_ACQUISITION_AND_RELEASE_AFTER_TRANSACTION" or even
* "DELAYED_ACQUISITION_AND_RELEASE_AFTER_STATEMENT" in such a scenario.
* @since 4.3.1
* @see #getJpaPropertyMap()
* @see HibernateJpaDialect#beginTransaction
*/
public void setPrepareConnection(boolean prepareConnection) {
this.jpaDialect.setPrepareConnection(prepareConnection);
}
@Override
public PersistenceProvider getPersistenceProvider() {
return this.persistenceProvider;
}
@Override
public String getPersistenceProviderRootPackage() {
return "org.hibernate";
}
@Override
public Map<String, Object> getJpaPropertyMap() {
Map<String, Object> jpaProperties = new HashMap<>();
if (getDatabasePlatform() != null) {
jpaProperties.put(AvailableSettings.DIALECT, getDatabasePlatform());
}
else if (getDatabase() != null) {
Class<?> databaseDialectClass = determineDatabaseDialectClass(getDatabase());
if (databaseDialectClass != null) {
jpaProperties.put(AvailableSettings.DIALECT, databaseDialectClass.getName());
}
}
if (isGenerateDdl()) {
jpaProperties.put(AvailableSettings.HBM2DDL_AUTO, "update");
}
if (isShowSql()) {
jpaProperties.put(AvailableSettings.SHOW_SQL, "true");
}
if (this.jpaDialect.prepareConnection) {
// Hibernate 5.1/5.2: manually enforce connection release mode ON_CLOSE (the former default)
try {
// Try Hibernate 5.2
AvailableSettings.class.getField("CONNECTION_HANDLING");
jpaProperties.put("hibernate.connection.handling_mode", "DELAYED_ACQUISITION_AND_HOLD");
}
catch (NoSuchFieldException ex) {
// Try Hibernate 5.1
try {
AvailableSettings.class.getField("ACQUIRE_CONNECTIONS");
jpaProperties.put("hibernate.connection.release_mode", "ON_CLOSE");
}
catch (NoSuchFieldException ex2) {
// on Hibernate 5.0.x or lower - no need to change the default there
}
}
}
return jpaProperties;
}
/**
* Determine the Hibernate database dialect class for the given target database.
* @param database the target database
* @return the Hibernate database dialect class, or {@code null} if none found
*/
protected Class<?> determineDatabaseDialectClass(Database database) {
switch (database) {
case DB2: return DB2Dialect.class;
case DERBY: return DerbyTenSevenDialect.class;
case H2: return H2Dialect.class;
case HSQL: return HSQLDialect.class;
case INFORMIX: return InformixDialect.class;
case MYSQL: return MySQL5Dialect.class;
case ORACLE: return Oracle12cDialect.class;
case POSTGRESQL: return PostgreSQL95Dialect.class;
case SQL_SERVER: return SQLServer2012Dialect.class;
case SYBASE: return SybaseDialect.class;
default: return null;
}
}
@Override
public HibernateJpaDialect getJpaDialect() {
return this.jpaDialect;
}
@Override
public Class<? extends EntityManagerFactory> getEntityManagerFactoryInterface() {
return this.entityManagerFactoryInterface;
}
@Override
public Class<? extends EntityManager> getEntityManagerInterface() {
return this.entityManagerInterface;
}
}