| /** |
| * 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.hadoop.hdfs.server.blockmanagement; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.net.NetworkTopology; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| public class BlockPlacementPolicies{ |
| |
| private final BlockPlacementPolicy replicationPolicy; |
| private final BlockPlacementPolicy ecPolicy; |
| |
| public BlockPlacementPolicies(Configuration conf, FSClusterStats stats, |
| NetworkTopology clusterMap, |
| Host2NodesMap host2datanodeMap){ |
| final Class<? extends BlockPlacementPolicy> replicatorClass = conf |
| .getClass(DFSConfigKeys.DFS_BLOCK_REPLICATOR_CLASSNAME_KEY, |
| DFSConfigKeys.DFS_BLOCK_REPLICATOR_CLASSNAME_DEFAULT, |
| BlockPlacementPolicy.class); |
| replicationPolicy = ReflectionUtils.newInstance(replicatorClass, conf); |
| replicationPolicy.initialize(conf, stats, clusterMap, host2datanodeMap); |
| final Class<? extends BlockPlacementPolicy> blockPlacementECClass = |
| conf.getClass(DFSConfigKeys.DFS_BLOCK_PLACEMENT_EC_CLASSNAME_KEY, |
| DFSConfigKeys.DFS_BLOCK_PLACEMENT_EC_CLASSNAME_DEFAULT, |
| BlockPlacementPolicy.class); |
| ecPolicy = ReflectionUtils.newInstance(blockPlacementECClass, conf); |
| ecPolicy.initialize(conf, stats, clusterMap, host2datanodeMap); |
| } |
| |
| public BlockPlacementPolicy getPolicy(boolean isStriped){ |
| if (isStriped) { |
| return ecPolicy; |
| } else { |
| return replicationPolicy; |
| } |
| } |
| } |