/*
* 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.helper;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import org.apache.cloudstack.engine.subsystem.api.storage.DataMotionStrategy;
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.SnapshotStrategy;
import org.apache.cloudstack.engine.subsystem.api.storage.SnapshotStrategy.SnapshotOperation;
import org.apache.cloudstack.engine.subsystem.api.storage.StorageStrategyFactory;
import org.apache.cloudstack.engine.subsystem.api.storage.StrategyPriority;
import org.apache.cloudstack.engine.subsystem.api.storage.VMSnapshotStrategy;
import org.apache.cloudstack.engine.subsystem.api.storage.VolumeInfo;
import com.cloud.host.Host;
import com.cloud.storage.Snapshot;
import com.cloud.vm.snapshot.VMSnapshot;
public class StorageStrategyFactoryImpl implements StorageStrategyFactory {
List<SnapshotStrategy> snapshotStrategies;
List<DataMotionStrategy> dataMotionStrategies;
List<VMSnapshotStrategy> vmSnapshotStrategies;
@Override
public DataMotionStrategy getDataMotionStrategy(final DataObject srcData, final DataObject destData) {
return bestMatch(dataMotionStrategies, new CanHandle<DataMotionStrategy>() {
@Override
public StrategyPriority canHandle(DataMotionStrategy strategy) {
return strategy.canHandle(srcData, destData);
}
});
}
@Override
public DataMotionStrategy getDataMotionStrategy(final Map<VolumeInfo, DataStore> volumeMap, final Host srcHost, final Host destHost) {
return bestMatch(dataMotionStrategies, new CanHandle<DataMotionStrategy>() {
@Override
public StrategyPriority canHandle(DataMotionStrategy strategy) {
return strategy.canHandle(volumeMap, srcHost, destHost);
}
});
}
@Override
public SnapshotStrategy getSnapshotStrategy(final Snapshot snapshot, final SnapshotOperation op) {
return bestMatch(snapshotStrategies, new CanHandle<SnapshotStrategy>() {
@Override
public StrategyPriority canHandle(SnapshotStrategy strategy) {
return strategy.canHandle(snapshot, op);
}
});
}
@Override
public VMSnapshotStrategy getVmSnapshotStrategy(final VMSnapshot vmSnapshot) {
return bestMatch(vmSnapshotStrategies, new CanHandle<VMSnapshotStrategy>() {
@Override
public StrategyPriority canHandle(VMSnapshotStrategy strategy) {
return strategy.canHandle(vmSnapshot);
}
});
}
private static <T> T bestMatch(Collection<T> collection, final CanHandle<T> canHandle) {
if (collection.size() == 0)
return null;
StrategyPriority highestPriority = StrategyPriority.CANT_HANDLE;
T strategyToUse = null;
for (T strategy : collection) {
StrategyPriority priority = canHandle.canHandle(strategy);
if (priority.ordinal() > highestPriority.ordinal()) {
highestPriority = priority;
strategyToUse = strategy;
}
}
return strategyToUse;
}
private static interface CanHandle<T> {
StrategyPriority canHandle(T strategy);
}
public List<SnapshotStrategy> getSnapshotStrategies() {
return snapshotStrategies;
}
@Inject
public void setSnapshotStrategies(List<SnapshotStrategy> snapshotStrategies) {
this.snapshotStrategies = snapshotStrategies;
}
public List<DataMotionStrategy> getDataMotionStrategies() {
return dataMotionStrategies;
}
@Inject
public void setDataMotionStrategies(List<DataMotionStrategy> dataMotionStrategies) {
this.dataMotionStrategies = dataMotionStrategies;
}
@Inject
public void setVmSnapshotStrategies(List<VMSnapshotStrategy> vmSnapshotStrategies) {
this.vmSnapshotStrategies = vmSnapshotStrategies;
}
public List<VMSnapshotStrategy> getVmSnapshotStrategies() {
return vmSnapshotStrategies;
}
}