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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.master.cleaner;
19  
20  import java.util.List;
21  
22  import org.apache.hadoop.classification.InterfaceAudience;
23  import org.apache.hadoop.conf.Configuration;
24  import org.apache.hadoop.fs.FileSystem;
25  import org.apache.hadoop.fs.Path;
26  import org.apache.hadoop.hbase.Stoppable;
27  import org.apache.hadoop.hbase.io.HFileLink;
28  import org.apache.hadoop.hbase.regionserver.StoreFileInfo;
29  /**
30   * This Chore, every time it runs, will clear the HFiles in the hfile archive
31   * folder that are deletable for each HFile cleaner in the chain.
32   */
33  @InterfaceAudience.Private
34  public class HFileCleaner extends CleanerChore<BaseHFileCleanerDelegate> {
35  
36    public static final String MASTER_HFILE_CLEANER_PLUGINS = "hbase.master.hfilecleaner.plugins";
37  
38    /**
39     * @param period the period of time to sleep between each run
40     * @param stopper the stopper
41     * @param conf configuration to use
42     * @param fs handle to the FS
43     * @param directory directory to be cleaned
44     */
45    public HFileCleaner(final int period, final Stoppable stopper, Configuration conf, FileSystem fs,
46        Path directory) {
47      super("HFileCleaner", period, stopper, conf, fs, directory, MASTER_HFILE_CLEANER_PLUGINS);
48    }
49  
50    @Override
51    protected boolean validate(Path file) {
52      if (HFileLink.isBackReferencesDir(file) || HFileLink.isBackReferencesDir(file.getParent())) {
53        return true;
54      }
55      return StoreFileInfo.validateStoreFileName(file.getName());
56    }
57  
58    /**
59     * Exposed for TESTING!
60     */
61    public List<BaseHFileCleanerDelegate> getDelegatesForTesting() {
62      return this.cleanersChain;
63    }
64  }