/*
* Copyright 2010 JBoss Inc
*
* 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.drools.container.spring.beans.persistence;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import org.drools.persistence.PersistenceContext;
import org.drools.persistence.jpa.JpaPersistenceContext;
import org.drools.runtime.Environment;
import org.drools.runtime.EnvironmentName;
import org.jbpm.persistence.JpaProcessPersistenceContext;
import org.jbpm.persistence.ProcessPersistenceContext;
import org.jbpm.persistence.ProcessPersistenceContextManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.orm.jpa.EntityManagerHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;
public class DroolsSpringJpaManager
implements
ProcessPersistenceContextManager {
Logger logger = LoggerFactory.getLogger( getClass() );
Environment env;
private EntityManagerFactory emf;
private EntityManager appScopedEntityManager;
private boolean internalAppScopedEntityManager;
private boolean isJTA;
public DroolsSpringJpaManager(Environment env) {
this.env = env;
this.emf = (EntityManagerFactory) env.get( EnvironmentName.ENTITY_MANAGER_FACTORY );
isJTA = true;
Boolean bool = (Boolean) env.get("IS_JTA_TRANSACTION");
if (bool != null) {
isJTA = bool.booleanValue();
}
getApplicationScopedPersistenceContext(); // we create this on initialisation so that we own the EMF reference
// otherwise Spring will close it after the transaction finishes
}
public PersistenceContext getApplicationScopedPersistenceContext() {
if ( this.appScopedEntityManager == null ) {
// Use the App scoped EntityManager if the user has provided it, and it is open.
this.appScopedEntityManager = (EntityManager) this.env.get( EnvironmentName.APP_SCOPED_ENTITY_MANAGER );
if ( this.appScopedEntityManager != null && !this.appScopedEntityManager.isOpen() ) {
throw new RuntimeException( "Provided APP_SCOPED_ENTITY_MANAGER is not open" );
}
if ( this.appScopedEntityManager == null ) {
EntityManagerHolder emHolder = (EntityManagerHolder) TransactionSynchronizationManager.getResource( this.emf );
if ( emHolder == null ) {
this.appScopedEntityManager = this.emf.createEntityManager();
emHolder = new EntityManagerHolder( this.appScopedEntityManager );
TransactionSynchronizationManager.bindResource( this.emf,
emHolder );
internalAppScopedEntityManager = true;
} else {
this.appScopedEntityManager = emHolder.getEntityManager();
}
this.env.set( EnvironmentName.APP_SCOPED_ENTITY_MANAGER,
emHolder.getEntityManager() );
}
}
if ( TransactionSynchronizationManager.isActualTransactionActive() && isJTA) {
this.appScopedEntityManager.joinTransaction();
}
return new JpaPersistenceContext( this.appScopedEntityManager, isJTA );
}
public PersistenceContext getCommandScopedPersistenceContext() {
return new JpaPersistenceContext( (EntityManager) this.env.get( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER ), isJTA );
}
public void beginCommandScopedEntityManager() {
EntityManager cmdScopedEntityManager = (EntityManager) env.get( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER );
if ( cmdScopedEntityManager == null || !cmdScopedEntityManager.isOpen() ) {
EntityManagerHolder emHolder = (EntityManagerHolder) TransactionSynchronizationManager.getResource( "cmdEM" );
EntityManager em = null;
if ( emHolder == null ) {
em = this.emf.createEntityManager();
emHolder = new EntityManagerHolder( em );
TransactionSynchronizationManager.bindResource( "cmdEM",
emHolder );
} else {
em = emHolder.getEntityManager();
}
this.env.set( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER,
em );
}
if (isJTA) {
this.getCommandScopedPersistenceContext().joinTransaction();
this.appScopedEntityManager.joinTransaction();
}
}
public void endCommandScopedEntityManager() {
if ( TransactionSynchronizationManager.hasResource( "cmdEM" ) ) {
TransactionSynchronizationManager.unbindResource( "cmdEM" );
if ( this.env.get( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER ) != null ) {
getCommandScopedPersistenceContext().close();
}
}
}
public void dispose() {
logger.trace( "Disposing DroolsSpringJpaManager" );
if ( internalAppScopedEntityManager ) {
//TransactionSynchronizationManager.unbindResource( "appEM" );
TransactionSynchronizationManager.unbindResource( this.emf );
if ( this.appScopedEntityManager != null && this.appScopedEntityManager.isOpen() ) {
this.appScopedEntityManager.close();
this.internalAppScopedEntityManager = false;
this.env.set( EnvironmentName.APP_SCOPED_ENTITY_MANAGER,
null );
this.appScopedEntityManager = null;
}
this.endCommandScopedEntityManager();
}
}
public ProcessPersistenceContext getProcessPersistenceContext() {
return new JpaProcessPersistenceContext( (EntityManager) this.env.get( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER ) );
}
public void clearPersistenceContext() {
if ( TransactionSynchronizationManager.hasResource( "cmdEM" ) ) {
EntityManager cmdScopedEntityManager = (EntityManager) this.env.get( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER );
if ( cmdScopedEntityManager != null ) {
cmdScopedEntityManager.clear();
}
}
}
}