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18 package org.apache.hadoop.hbase.regionserver.compactions;
19
20 import java.io.IOException;
21 import java.io.InterruptedIOException;
22 import java.util.ArrayList;
23 import java.util.Collection;
24 import java.util.Collections;
25 import java.util.List;
26
27 import org.apache.commons.logging.Log;
28 import org.apache.commons.logging.LogFactory;
29 import org.apache.hadoop.hbase.classification.InterfaceAudience;
30 import org.apache.hadoop.conf.Configuration;
31 import org.apache.hadoop.fs.Path;
32 import org.apache.hadoop.hbase.regionserver.InternalScanner;
33 import org.apache.hadoop.hbase.regionserver.ScanType;
34 import org.apache.hadoop.hbase.regionserver.Store;
35 import org.apache.hadoop.hbase.regionserver.StoreFile;
36 import org.apache.hadoop.hbase.regionserver.StoreFileScanner;
37 import org.apache.hadoop.hbase.security.User;
38
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41
42
43 @InterfaceAudience.Private
44 public class DefaultCompactor extends Compactor {
45 private static final Log LOG = LogFactory.getLog(DefaultCompactor.class);
46
47 public DefaultCompactor(final Configuration conf, final Store store) {
48 super(conf, store);
49 }
50
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53
54 public List<Path> compact(final CompactionRequest request,
55 CompactionThroughputController throughputController, User user) throws IOException {
56 FileDetails fd = getFileDetails(request.getFiles(), request.isAllFiles());
57 this.progress = new CompactionProgress(fd.maxKeyCount);
58
59
60 long smallestReadPoint = getSmallestReadPoint();
61
62 List<StoreFileScanner> scanners;
63 Collection<StoreFile> readersToClose;
64 if (this.conf.getBoolean("hbase.regionserver.compaction.private.readers", false)) {
65
66
67 readersToClose = new ArrayList<StoreFile>(request.getFiles().size());
68 for (StoreFile f : request.getFiles()) {
69 readersToClose.add(new StoreFile(f));
70 }
71 scanners = createFileScanners(readersToClose, smallestReadPoint);
72 } else {
73 readersToClose = Collections.emptyList();
74 scanners = createFileScanners(request.getFiles(), smallestReadPoint);
75 }
76
77 StoreFile.Writer writer = null;
78 List<Path> newFiles = new ArrayList<Path>();
79 boolean cleanSeqId = false;
80 IOException e = null;
81 try {
82 InternalScanner scanner = null;
83 try {
84
85 ScanType scanType =
86 request.isAllFiles() ? ScanType.COMPACT_DROP_DELETES : ScanType.COMPACT_RETAIN_DELETES;
87 scanner = preCreateCoprocScanner(request, scanType, fd.earliestPutTs, scanners, user);
88 if (scanner == null) {
89 scanner = createScanner(store, scanners, scanType, smallestReadPoint, fd.earliestPutTs);
90 }
91 scanner = postCreateCoprocScanner(request, scanType, scanner, user);
92 if (scanner == null) {
93
94 return newFiles;
95 }
96
97
98 if(fd.minSeqIdToKeep > 0) {
99 smallestReadPoint = Math.min(fd.minSeqIdToKeep, smallestReadPoint);
100 cleanSeqId = true;
101 }
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105 writer = store.createWriterInTmp(fd.maxKeyCount, this.compactionCompression, true,
106 fd.maxMVCCReadpoint > 0, fd.maxTagsLength > 0);
107 boolean finished =
108 performCompaction(scanner, writer, smallestReadPoint, cleanSeqId, throughputController);
109 if (!finished) {
110 writer.close();
111 store.getFileSystem().delete(writer.getPath(), false);
112 writer = null;
113 throw new InterruptedIOException( "Aborting compaction of store " + store +
114 " in region " + store.getRegionInfo().getRegionNameAsString() +
115 " because it was interrupted.");
116 }
117 } finally {
118 if (scanner != null) {
119 scanner.close();
120 }
121 }
122 } catch (IOException ioe) {
123 e = ioe;
124
125 throw ioe;
126 }
127 finally {
128 try {
129 if (writer != null) {
130 if (e != null) {
131 writer.close();
132 } else {
133 writer.appendMetadata(fd.maxSeqId, request.isAllFiles());
134 writer.close();
135 newFiles.add(writer.getPath());
136 }
137 }
138 } finally {
139 for (StoreFile f : readersToClose) {
140 try {
141 f.closeReader(true);
142 } catch (IOException ioe) {
143 LOG.warn("Exception closing " + f, ioe);
144 }
145 }
146 }
147 }
148 return newFiles;
149 }
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161 public List<Path> compactForTesting(final Collection<StoreFile> filesToCompact, boolean isMajor)
162 throws IOException {
163 CompactionRequest cr = new CompactionRequest(filesToCompact);
164 cr.setIsMajor(isMajor, isMajor);
165 return this.compact(cr, NoLimitCompactionThroughputController.INSTANCE, null);
166 }
167 }