/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, 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.stats;
import com.google.appengine.api.datastore.Query;
import com.google.appengine.api.datastore.Transaction;
import org.jboss.capedwarf.datastore.query.QueryHandle;
import org.jboss.capedwarf.datastore.query.QueryHandleService;
import org.jboss.capedwarf.datastore.query.QueryTypeFactory;
import org.jboss.capedwarf.shared.compatibility.Compatibility;
/**
* Query type factory.
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
public class StatsQueryTypeFactory implements QueryTypeFactory {
private QueryHandle queryHandle;
public static boolean isStatsKind(String kind) {
return kind != null && kind.startsWith("__Stat_") && kind.endsWith("__");
}
protected boolean isEager() {
Compatibility compatibility = Compatibility.getInstance();
return compatibility.isEnabled(Compatibility.Feature.ENABLE_EAGER_DATASTORE_STATS);
}
public void initialize(QueryHandleService service) {
if (isEager()) {
queryHandle = new EagerStatsQueryHandle(service);
} else {
queryHandle = new OnDemandStatsQueryHandle(service);
}
}
public boolean handleQuery(Transaction tx, Query query) {
return isStatsKind(query.getKind());
}
public QueryHandle createQueryHandle(QueryHandleService service) {
return queryHandle;
}
}