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18 package org.apache.hadoop.hbase.master.snapshot;
19
20 import java.io.IOException;
21 import java.util.Collection;
22
23 import org.apache.commons.logging.Log;
24 import org.apache.commons.logging.LogFactory;
25 import org.apache.hadoop.classification.InterfaceAudience;
26 import org.apache.hadoop.classification.InterfaceStability;
27 import org.apache.hadoop.conf.Configuration;
28 import org.apache.hadoop.fs.FileSystem;
29 import org.apache.hadoop.fs.Path;
30 import org.apache.hadoop.hbase.master.cleaner.BaseHFileCleanerDelegate;
31 import org.apache.hadoop.hbase.snapshot.SnapshotReferenceUtil;
32 import org.apache.hadoop.hbase.util.FSUtils;
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37
38 @InterfaceAudience.Private
39 @InterfaceStability.Evolving
40 public class SnapshotHFileCleaner extends BaseHFileCleanerDelegate {
41 private static final Log LOG = LogFactory.getLog(SnapshotHFileCleaner.class);
42
43
44
45
46
47 public static final String HFILE_CACHE_REFRESH_PERIOD_CONF_KEY =
48 "hbase.master.hfilecleaner.plugins.snapshot.period";
49
50
51 private static final long DEFAULT_HFILE_CACHE_REFRESH_PERIOD = 300000;
52
53
54 private SnapshotFileCache cache;
55
56 @Override
57 public synchronized boolean isFileDeletable(Path filePath) {
58 try {
59 return !cache.contains(filePath.getName());
60 } catch (IOException e) {
61 LOG.error("Exception while checking if:" + filePath + " was valid, keeping it just in case.",
62 e);
63 return false;
64 }
65 }
66
67 @Override
68 public void setConf(Configuration conf) {
69 super.setConf(conf);
70 try {
71 long cacheRefreshPeriod = conf.getLong(HFILE_CACHE_REFRESH_PERIOD_CONF_KEY,
72 DEFAULT_HFILE_CACHE_REFRESH_PERIOD);
73 final FileSystem fs = FSUtils.getCurrentFileSystem(conf);
74 Path rootDir = FSUtils.getRootDir(conf);
75 cache = new SnapshotFileCache(fs, rootDir, cacheRefreshPeriod, cacheRefreshPeriod,
76 "snapshot-hfile-cleaner-cache-refresher", new SnapshotFileCache.SnapshotFileInspector() {
77 public Collection<String> filesUnderSnapshot(final Path snapshotDir)
78 throws IOException {
79 return SnapshotReferenceUtil.getHFileNames(fs, snapshotDir);
80 }
81 });
82 } catch (IOException e) {
83 LOG.error("Failed to create cleaner util", e);
84 }
85 }
86
87 @Override
88 public void stop(String why) {
89 this.cache.stop(why);
90 }
91
92 @Override
93 public boolean isStopped() {
94 return this.cache.isStopped();
95 }
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101 public SnapshotFileCache getFileCacheForTesting() {
102 return this.cache;
103 }
104 }