/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.cs.internal.messages;
import com.db4o.cs.internal.objectexchange.*;
import com.db4o.foundation.*;
import com.db4o.internal.query.processor.*;
import com.db4o.internal.query.result.*;
public final class MQueryExecute extends MsgQuery implements MessageWithResponse {
public Msg replyFromServer() {
unmarshall(_payLoad._offset);
final ObjectByRef<Msg> result = new ObjectByRef();
container().withTransaction(transaction(), new Runnable() { public void run() {
final QQuery query = unmarshallQuery();
result.value = writeQueryResult(executeFully(query), query.evaluationMode(), new ObjectExchangeConfiguration(query.prefetchDepth(), query.prefetchCount()));
}});
return result.value;
}
private QQuery unmarshallQuery() {
// TODO: The following used to run outside of the
// Synchronization block for better performance but
// produced inconsistent results, cause unknown.
QQuery query = (QQuery) readObjectFromPayLoad();
query.unmarshall(transaction());
return query;
}
private AbstractQueryResult executeFully(final QQuery query) {
return query.triggeringQueryEvents(new Closure4<AbstractQueryResult>() { public AbstractQueryResult run() {
AbstractQueryResult qr = newQueryResult(query.evaluationMode());
qr.loadFromQuery(query);
return qr;
}});
}
}