| /** |
| * 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.datanode; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.CachingGetSpaceUsed; |
| import org.apache.hadoop.fs.GetSpaceUsed; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Fast and accurate class to tell how much space HDFS is using. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public abstract class FSCachingGetSpaceUsed extends CachingGetSpaceUsed { |
| static final Logger LOG = |
| LoggerFactory.getLogger(FSCachingGetSpaceUsed.class); |
| |
| public FSCachingGetSpaceUsed(Builder builder) throws IOException { |
| super(builder); |
| } |
| |
| /** |
| * The builder class. |
| */ |
| public static class Builder extends GetSpaceUsed.Builder { |
| private FsVolumeImpl volume; |
| private String bpid; |
| |
| public FsVolumeImpl getVolume() { |
| return volume; |
| } |
| |
| public Builder setVolume(FsVolumeImpl fsVolume) { |
| this.volume = fsVolume; |
| return this; |
| } |
| |
| public String getBpid() { |
| return bpid; |
| } |
| |
| public Builder setBpid(String bpid) { |
| this.bpid = bpid; |
| return this; |
| } |
| |
| @Override |
| public GetSpaceUsed build() throws IOException { |
| Class clazz = getKlass(); |
| if (FSCachingGetSpaceUsed.class.isAssignableFrom(clazz)) { |
| try { |
| setCons(clazz.getConstructor(Builder.class)); |
| } catch (NoSuchMethodException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| return super.build(); |
| } |
| } |
| } |