org.candlepin.gutterball.curator.EventCurator.java Source code

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Here is the source code for org.candlepin.gutterball.curator.EventCurator.java

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/**
 * Copyright (c) 2009 - 2012 Red Hat, Inc.
 *
 * This software is licensed to you under the GNU General Public License,
 * version 2 (GPLv2). There is NO WARRANTY for this software, express or
 * implied, including the implied warranties of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2
 * along with this software; if not, see
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * Red Hat trademarks are not licensed under GPLv2. No permission is
 * granted to use or replicate Red Hat trademarks that are incorporated
 * in this software or its documentation.
 */

package org.candlepin.gutterball.curator;

import java.util.Calendar;

import javax.persistence.Query;

import org.candlepin.gutterball.model.Event;

import com.google.inject.Inject;
import com.google.inject.persist.Transactional;

import org.hibernate.Criteria;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;

/**
 * Responsible for managing {@link Event} model objects and storing/retrieving to/from
 * the database.
 */
public class EventCurator extends BaseCurator<Event> {

    @Inject
    public EventCurator() {
        super(Event.class);
    }

    public boolean hasEventForMessage(String messageId) {
        // Do not include UNKNOWN since they were Events that
        // existed pre-update and there is no way to recover the
        // message ID.
        Criteria criteria = currentSession().createCriteria(Event.class)
                .add(Restrictions.eq("messageId", messageId)).add(Restrictions.ne("messageId", "UNKNOWN"))
                .setProjection(Projections.count("id"));
        return ((Long) criteria.uniqueResult()) > 0;
    }

    @Transactional
    public int cleanupEvents(int minutes) {
        // Can't effectively delete items using Criteria API so we'll use HQL
        // to get it done in one request.
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.MINUTE, -1 * minutes);

        String deleteHQL = "delete from Event where timestamp <= :date and status != :event_status";
        Query query = getEntityManager().createQuery(deleteHQL);
        query.setParameter("date", cal.getTime());
        query.setParameter("event_status", Event.Status.RECEIVED);
        return query.executeUpdate();
    }
}