Mercurial > hg > release > thermostat-0.5
view common/core/src/main/java/com/redhat/thermostat/common/dao/VmLatestPojoListGetter.java @ 904:6e38be537e2a
Register data-class with categories.
Reviewed-by: vanaltj
http://icedtea.classpath.org/pipermail/thermostat/2013-January/005069.html
author | Roman Kennke <rkennke@redhat.com> |
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date | Thu, 10 Jan 2013 21:47:29 +0100 |
parents | 4de458324cf9 |
children | ccac9bcabaa0 |
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/* * Copyright 2012 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.common.dao; import java.util.ArrayList; import java.util.List; import com.redhat.thermostat.storage.core.Category; import com.redhat.thermostat.storage.core.Cursor; import com.redhat.thermostat.storage.core.Key; import com.redhat.thermostat.storage.core.Query; import com.redhat.thermostat.storage.core.Storage; import com.redhat.thermostat.storage.core.Query.Criteria; import com.redhat.thermostat.storage.model.TimeStampedPojo; public class VmLatestPojoListGetter<T extends TimeStampedPojo> { private final Storage storage; private final Category<T> cat; public VmLatestPojoListGetter(Storage storage, Category<T> cat) { this.storage = storage; this.cat = cat; } public List<T> getLatest(VmRef vmRef, long since) { Query<T> query = buildQuery(vmRef, since); return getLatest(query); } private List<T> getLatest(Query<T> query) { Cursor<T> cursor = query.execute(); List<T> result = new ArrayList<>(); while (cursor.hasNext()) { T pojo = cursor.next(); result.add(pojo); } return result; } protected Query<T> buildQuery(VmRef vmRef, long since) { Query<T> query = storage.createQuery(cat); query.where(Key.AGENT_ID, Criteria.EQUALS, vmRef.getAgent().getAgentId()); query.where(Key.VM_ID, Criteria.EQUALS, vmRef.getId()); query.where(Key.TIMESTAMP, Criteria.GREATER_THAN, since); query.sort(Key.TIMESTAMP, Query.SortDirection.DESCENDING); return query; } }