/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.cloudstack.storage.cache.manager;
import java.util.Calendar;
import java.util.Date;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import org.apache.cloudstack.engine.subsystem.api.storage.DataObject;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.ObjectInDataStoreStateMachine;
import org.apache.cloudstack.engine.subsystem.api.storage.SnapshotDataFactory;
import org.apache.cloudstack.engine.subsystem.api.storage.TemplateDataFactory;
import org.apache.cloudstack.engine.subsystem.api.storage.VolumeDataFactory;
import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
import org.apache.cloudstack.storage.datastore.db.SnapshotDataStoreVO;
import org.apache.cloudstack.storage.datastore.db.TemplateDataStoreVO;
import org.apache.cloudstack.storage.datastore.db.VolumeDataStoreVO;
import com.cloud.configuration.Config;
import com.cloud.utils.DateUtil;
import com.cloud.utils.NumbersUtil;
import com.cloud.utils.db.QueryBuilder;
import com.cloud.utils.db.SearchCriteria;
public class StorageCacheReplacementAlgorithmLRU implements StorageCacheReplacementAlgorithm {
@Inject
ConfigurationDao configDao;
@Inject
TemplateDataFactory templateFactory;
@Inject
VolumeDataFactory volumeFactory;
@Inject
SnapshotDataFactory snapshotFactory;
Integer unusedTimeInterval;
public StorageCacheReplacementAlgorithmLRU() {
}
@PostConstruct
public void initialize() {
/* Avoid using configDao at this time, we can't be sure that the database is already upgraded
* and there might be fatal errors when using a dao.
*/
//unusedTimeInterval = NumbersUtil.parseInt(configDao.getValue(Config.StorageCacheReplacementLRUTimeInterval.key()), 30);
}
public void setUnusedTimeInterval(Integer interval) {
unusedTimeInterval = interval;
}
@Override
public DataObject chooseOneToBeReplaced(DataStore store) {
if (unusedTimeInterval == null) {
unusedTimeInterval = NumbersUtil.parseInt(configDao.getValue(Config.StorageCacheReplacementLRUTimeInterval.key()), 30);
}
Calendar cal = Calendar.getInstance();
cal.setTime(DateUtil.now());
cal.add(Calendar.DAY_OF_MONTH, -unusedTimeInterval.intValue());
Date bef = cal.getTime();
QueryBuilder<TemplateDataStoreVO> sc = QueryBuilder.create(TemplateDataStoreVO.class);
sc.and(sc.entity().getLastUpdated(), SearchCriteria.Op.LT, bef);
sc.and(sc.entity().getState(), SearchCriteria.Op.EQ, ObjectInDataStoreStateMachine.State.Ready);
sc.and(sc.entity().getDataStoreId(), SearchCriteria.Op.EQ, store.getId());
sc.and(sc.entity().getDataStoreRole(), SearchCriteria.Op.EQ, store.getRole());
sc.and(sc.entity().getRefCnt(), SearchCriteria.Op.EQ, 0);
TemplateDataStoreVO template = sc.find();
if (template != null) {
return templateFactory.getTemplate(template.getTemplateId(), store);
}
QueryBuilder<VolumeDataStoreVO> volSc = QueryBuilder.create(VolumeDataStoreVO.class);
volSc.and(volSc.entity().getLastUpdated(), SearchCriteria.Op.LT, bef);
volSc.and(volSc.entity().getState(), SearchCriteria.Op.EQ, ObjectInDataStoreStateMachine.State.Ready);
volSc.and(volSc.entity().getDataStoreId(), SearchCriteria.Op.EQ, store.getId());
volSc.and(volSc.entity().getRefCnt(), SearchCriteria.Op.EQ, 0);
VolumeDataStoreVO volume = volSc.find();
if (volume != null) {
return volumeFactory.getVolume(volume.getVolumeId(), store);
}
QueryBuilder<SnapshotDataStoreVO> snapshotSc = QueryBuilder.create(SnapshotDataStoreVO.class);
snapshotSc.and(snapshotSc.entity().getLastUpdated(), SearchCriteria.Op.LT, bef);
snapshotSc.and(snapshotSc.entity().getState(), SearchCriteria.Op.EQ, ObjectInDataStoreStateMachine.State.Ready);
snapshotSc.and(snapshotSc.entity().getDataStoreId(), SearchCriteria.Op.EQ, store.getId());
snapshotSc.and(snapshotSc.entity().getRole(), SearchCriteria.Op.EQ, store.getRole());
snapshotSc.and(snapshotSc.entity().getRefCnt(), SearchCriteria.Op.EQ, 0);
SnapshotDataStoreVO snapshot = snapshotSc.find();
if (snapshot != null) {
return snapshotFactory.getSnapshot(snapshot.getSnapshotId(), store);
}
return null;
}
}