| /* |
| * 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.allocator; |
| |
| import java.util.List; |
| |
| import javax.inject.Inject; |
| |
| import org.apache.log4j.Logger; |
| import org.springframework.stereotype.Component; |
| |
| import org.apache.cloudstack.engine.subsystem.api.storage.DataObject; |
| import org.apache.cloudstack.engine.subsystem.api.storage.DataObjectInStore; |
| import org.apache.cloudstack.engine.subsystem.api.storage.DataStore; |
| import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreManager; |
| import org.apache.cloudstack.engine.subsystem.api.storage.ObjectInDataStoreStateMachine; |
| import org.apache.cloudstack.engine.subsystem.api.storage.Scope; |
| import org.apache.cloudstack.storage.datastore.ObjectInDataStoreManager; |
| import org.apache.cloudstack.storage.image.datastore.ImageStoreProviderManager; |
| |
| import com.cloud.server.StatsCollector; |
| import com.cloud.storage.ScopeType; |
| |
| @Component |
| public class StorageCacheRandomAllocator implements StorageCacheAllocator { |
| private static final Logger s_logger = Logger.getLogger(StorageCacheRandomAllocator.class); |
| @Inject |
| DataStoreManager dataStoreMgr; |
| @Inject |
| ObjectInDataStoreManager objectInStoreMgr; |
| @Inject |
| ImageStoreProviderManager imageStoreMgr; |
| @Inject |
| StatsCollector statsCollector; |
| |
| @Override |
| public DataStore getCacheStore(Scope scope) { |
| if (scope.getScopeType() != ScopeType.ZONE) { |
| s_logger.debug("Can only support zone wide cache storage"); |
| return null; |
| } |
| |
| List<DataStore> cacheStores = dataStoreMgr.getImageCacheStores(scope); |
| if ((cacheStores == null) || (cacheStores.size() <= 0)) { |
| s_logger.debug("Can't find staging storage in zone: " + scope.getScopeId()); |
| return null; |
| } |
| |
| return imageStoreMgr.getImageStore(cacheStores); |
| } |
| |
| @Override |
| public DataStore getCacheStore(DataObject data, Scope scope) { |
| if (scope.getScopeType() != ScopeType.ZONE) { |
| s_logger.debug("Can only support zone wide cache storage"); |
| return null; |
| } |
| |
| List<DataStore> cacheStores = dataStoreMgr.getImageCacheStores(scope); |
| if (cacheStores.size() <= 0) { |
| s_logger.debug("Can't find staging storage in zone: " + scope.getScopeId()); |
| return null; |
| } |
| |
| // if there are multiple cache stores, we give priority to the one where data is already there |
| if (cacheStores.size() > 1) { |
| for (DataStore store : cacheStores) { |
| DataObjectInStore obj = objectInStoreMgr.findObject(data, store); |
| if (obj != null && obj.getState() == ObjectInDataStoreStateMachine.State.Ready && statsCollector.imageStoreHasEnoughCapacity(store)) { |
| s_logger.debug("pick the cache store " + store.getId() + " where data is already there"); |
| return store; |
| } |
| } |
| } |
| return imageStoreMgr.getImageStore(cacheStores); |
| } |
| } |