/*
* Copyright 2011 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.persistence.jpa;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.FlushModeType;
import org.drools.persistence.PersistenceContext;
import org.drools.persistence.PersistenceContextManager;
import org.kie.api.runtime.Environment;
import org.kie.api.runtime.EnvironmentName;
public class JpaPersistenceContextManager
implements
PersistenceContextManager {
Environment env;
private EntityManagerFactory emf;
private EntityManager appScopedEntityManager;
protected EntityManager cmdScopedEntityManager;
private boolean internalAppScopedEntityManager;
private boolean internalCmdScopedEntityManager;
public JpaPersistenceContextManager(Environment env) {
this.env = env;
this.emf = ( EntityManagerFactory ) env.get( EnvironmentName.ENTITY_MANAGER_FACTORY );
}
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 ) {
internalAppScopedEntityManager = true;
this.appScopedEntityManager = this.emf.createEntityManager();
this.env.set( EnvironmentName.APP_SCOPED_ENTITY_MANAGER,
this.appScopedEntityManager );
} else {
internalAppScopedEntityManager = false;
}
}
return new JpaPersistenceContext( appScopedEntityManager );
}
public PersistenceContext getCommandScopedPersistenceContext() {
return new JpaPersistenceContext( this.cmdScopedEntityManager );
}
public void beginCommandScopedEntityManager() {
EntityManager cmdScopedEntityManager = (EntityManager) env.get( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER );
if ( cmdScopedEntityManager == null ||
( this.cmdScopedEntityManager != null && !this.cmdScopedEntityManager.isOpen() )) {
internalCmdScopedEntityManager = true;
this.cmdScopedEntityManager = this.emf.createEntityManager(); // no need to call joinTransaction as it will do so if one already exists
this.cmdScopedEntityManager.setFlushMode(FlushModeType.COMMIT);
this.env.set( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER,
this.cmdScopedEntityManager );
cmdScopedEntityManager = this.cmdScopedEntityManager;
} else {
internalCmdScopedEntityManager = false;
}
cmdScopedEntityManager.joinTransaction();
appScopedEntityManager.joinTransaction();
}
public void endCommandScopedEntityManager() {
if ( this.internalCmdScopedEntityManager ) {
this.env.set( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER,
null );
}
}
public void dispose() {
if ( this.internalAppScopedEntityManager ) {
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;
}
if ( this.internalCmdScopedEntityManager ) {
if ( this.cmdScopedEntityManager != null && this.cmdScopedEntityManager.isOpen() ) {
this.cmdScopedEntityManager.close();
}
this.internalCmdScopedEntityManager = false;
this.env.set( EnvironmentName.CMD_SCOPED_ENTITY_MANAGER, null );
this.cmdScopedEntityManager = null;
}
}
public void clearPersistenceContext() {
if (this.cmdScopedEntityManager != null && this.cmdScopedEntityManager.isOpen()) {
this.cmdScopedEntityManager.clear();
}
}
}