/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.capedwarf.datastore;
import com.google.appengine.api.datastore.DatastoreServiceConfig;
import com.google.appengine.api.datastore.ImplicitTransactionManagementPolicy;
import com.google.appengine.api.datastore.Transaction;
import org.jboss.capedwarf.aspects.AbstractAspect;
import org.jboss.capedwarf.aspects.proxy.AspectContext;
/**
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
final class AutoTxAspect extends AbstractAspect<AutoTx> {
AutoTxAspect() {
super(AutoTx.class);
}
public Object invoke(AspectContext context) throws Throwable {
AbstractDatastoreService service = (AbstractDatastoreService) context.getInfo().getApiImpl();
DatastoreServiceConfig config = service.getDatastoreServiceConfig();
if (config.getImplicitTransactionManagementPolicy() == ImplicitTransactionManagementPolicy.AUTO) {
Transaction tx = CapedwarfTransaction.currentTransaction();
final boolean isNew = (tx == null);
if (isNew) {
tx = CapedwarfTransaction.newTransaction(null);
}
try {
Object result = context.proceed();
if (isNew) {
tx.commit();
}
return result;
} catch (Throwable t) {
if (isNew) {
tx.rollback();
}
throw t;
}
} else {
return context.proceed();
}
}
}