1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 package org.apache.hadoop.hbase;
19
20 import com.google.common.annotations.VisibleForTesting;
21 import com.google.protobuf.ServiceException;
22
23 import org.apache.commons.logging.Log;
24 import org.apache.commons.logging.LogFactory;
25 import org.apache.hadoop.conf.Configuration;
26 import org.apache.hadoop.hbase.classification.InterfaceAudience;
27 import org.apache.hadoop.hbase.client.ClusterConnection;
28 import org.apache.hadoop.hbase.client.Connection;
29 import org.apache.hadoop.hbase.client.ConnectionFactory;
30 import org.apache.hadoop.hbase.client.Delete;
31 import org.apache.hadoop.hbase.client.Get;
32 import org.apache.hadoop.hbase.client.HTable;
33 import org.apache.hadoop.hbase.client.Mutation;
34 import org.apache.hadoop.hbase.client.Put;
35 import org.apache.hadoop.hbase.client.RegionLocator;
36 import org.apache.hadoop.hbase.client.RegionReplicaUtil;
37 import org.apache.hadoop.hbase.client.Result;
38 import org.apache.hadoop.hbase.client.ResultScanner;
39 import org.apache.hadoop.hbase.client.Scan;
40 import org.apache.hadoop.hbase.client.Table;
41 import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
42 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
43 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos;
44 import org.apache.hadoop.hbase.protobuf.generated.MultiRowMutationProtos;
45 import org.apache.hadoop.hbase.util.Bytes;
46 import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
47 import org.apache.hadoop.hbase.util.Pair;
48 import org.apache.hadoop.hbase.util.PairOfSameType;
49 import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;
50 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
51
52 import java.io.IOException;
53 import java.io.InterruptedIOException;
54 import java.util.ArrayList;
55 import java.util.List;
56 import java.util.Map;
57 import java.util.NavigableMap;
58 import java.util.Set;
59 import java.util.SortedMap;
60 import java.util.TreeMap;
61 import java.util.regex.Matcher;
62 import java.util.regex.Pattern;
63
64
65
66
67
68
69
70
71
72
73 @InterfaceAudience.Private
74 public class MetaTableAccessor {
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112 private static final Log LOG = LogFactory.getLog(MetaTableAccessor.class);
113
114 static final byte [] META_REGION_PREFIX;
115 static {
116
117
118 int len = HRegionInfo.FIRST_META_REGIONINFO.getRegionName().length - 2;
119 META_REGION_PREFIX = new byte [len];
120 System.arraycopy(HRegionInfo.FIRST_META_REGIONINFO.getRegionName(), 0,
121 META_REGION_PREFIX, 0, len);
122 }
123
124
125 protected static final char META_REPLICA_ID_DELIMITER = '_';
126
127
128 private static final Pattern SERVER_COLUMN_PATTERN
129 = Pattern.compile("^server(_[0-9a-fA-F]{4})?$");
130
131
132
133
134
135
136
137
138
139
140 public static List<Result> fullScanOfMeta(Connection connection)
141 throws IOException {
142 CollectAllVisitor v = new CollectAllVisitor();
143 fullScan(connection, v, null);
144 return v.getResults();
145 }
146
147
148
149
150
151
152
153 public static void fullScan(Connection connection,
154 final Visitor visitor)
155 throws IOException {
156 fullScan(connection, visitor, null);
157 }
158
159
160
161
162
163
164
165 public static List<Result> fullScan(Connection connection)
166 throws IOException {
167 CollectAllVisitor v = new CollectAllVisitor();
168 fullScan(connection, v, null);
169 return v.getResults();
170 }
171
172
173
174
175
176
177
178 static Table getMetaHTable(final Connection connection)
179 throws IOException {
180
181 if (connection == null) {
182 throw new NullPointerException("No connection");
183 } else if (connection.isClosed()) {
184 throw new IOException("connection is closed");
185 }
186
187
188
189
190
191
192
193
194 if (connection instanceof ClusterConnection) {
195 if (((ClusterConnection) connection).isManaged()) {
196 return new HTable(TableName.META_TABLE_NAME, (ClusterConnection) connection);
197 }
198 }
199 return connection.getTable(TableName.META_TABLE_NAME);
200 }
201
202
203
204
205
206
207 private static Result get(final Table t, final Get g) throws IOException {
208 try {
209 return t.get(g);
210 } finally {
211 t.close();
212 }
213 }
214
215
216
217
218
219
220
221
222
223 @Deprecated
224 public static Pair<HRegionInfo, ServerName> getRegion(Connection connection, byte [] regionName)
225 throws IOException {
226 HRegionLocation location = getRegionLocation(connection, regionName);
227 return location == null
228 ? null
229 : new Pair<HRegionInfo, ServerName>(location.getRegionInfo(), location.getServerName());
230 }
231
232
233
234
235
236
237
238
239 public static HRegionLocation getRegionLocation(Connection connection,
240 byte[] regionName) throws IOException {
241 byte[] row = regionName;
242 HRegionInfo parsedInfo = null;
243 try {
244 parsedInfo = parseRegionInfoFromRegionName(regionName);
245 row = getMetaKeyForRegion(parsedInfo);
246 } catch (Exception parseEx) {
247
248 }
249 Get get = new Get(row);
250 get.addFamily(HConstants.CATALOG_FAMILY);
251 Result r = get(getMetaHTable(connection), get);
252 RegionLocations locations = getRegionLocations(r);
253 return locations == null
254 ? null
255 : locations.getRegionLocation(parsedInfo == null ? 0 : parsedInfo.getReplicaId());
256 }
257
258
259
260
261
262
263
264
265 public static HRegionLocation getRegionLocation(Connection connection,
266 HRegionInfo regionInfo) throws IOException {
267 byte[] row = getMetaKeyForRegion(regionInfo);
268 Get get = new Get(row);
269 get.addFamily(HConstants.CATALOG_FAMILY);
270 Result r = get(getMetaHTable(connection), get);
271 return getRegionLocation(r, regionInfo, regionInfo.getReplicaId());
272 }
273
274
275 public static byte[] getMetaKeyForRegion(HRegionInfo regionInfo) {
276 return RegionReplicaUtil.getRegionInfoForDefaultReplica(regionInfo).getRegionName();
277 }
278
279
280
281
282
283 protected static HRegionInfo parseRegionInfoFromRegionName(byte[] regionName)
284 throws IOException {
285 byte[][] fields = HRegionInfo.parseRegionName(regionName);
286 long regionId = Long.parseLong(Bytes.toString(fields[2]));
287 int replicaId = fields.length > 3 ? Integer.parseInt(Bytes.toString(fields[3]), 16) : 0;
288 return new HRegionInfo(
289 TableName.valueOf(fields[0]), fields[1], fields[1], false, regionId, replicaId);
290 }
291
292
293
294
295
296
297
298
299 public static Result getRegionResult(Connection connection,
300 byte[] regionName) throws IOException {
301 Get get = new Get(regionName);
302 get.addFamily(HConstants.CATALOG_FAMILY);
303 return get(getMetaHTable(connection), get);
304 }
305
306
307
308
309
310
311 public static Pair<HRegionInfo, HRegionInfo> getRegionsFromMergeQualifier(
312 Connection connection, byte[] regionName) throws IOException {
313 Result result = getRegionResult(connection, regionName);
314 HRegionInfo mergeA = getHRegionInfo(result, HConstants.MERGEA_QUALIFIER);
315 HRegionInfo mergeB = getHRegionInfo(result, HConstants.MERGEB_QUALIFIER);
316 if (mergeA == null && mergeB == null) {
317 return null;
318 }
319 return new Pair<HRegionInfo, HRegionInfo>(mergeA, mergeB);
320 }
321
322
323
324
325
326
327
328
329
330 public static boolean tableExists(Connection connection,
331 final TableName tableName)
332 throws IOException {
333 if (tableName.equals(TableName.META_TABLE_NAME)) {
334
335 return true;
336 }
337
338 CollectingVisitor<HRegionInfo> visitor = new CollectingVisitor<HRegionInfo>() {
339 private HRegionInfo current = null;
340
341 @Override
342 public boolean visit(Result r) throws IOException {
343 RegionLocations locations = getRegionLocations(r);
344 if (locations == null || locations.getRegionLocation().getRegionInfo() == null) {
345 LOG.warn("No serialized HRegionInfo in " + r);
346 return true;
347 }
348 this.current = locations.getRegionLocation().getRegionInfo();
349 if (this.current == null) {
350 LOG.warn("No serialized HRegionInfo in " + r);
351 return true;
352 }
353 if (!isInsideTable(this.current, tableName)) return false;
354
355 super.visit(r);
356
357 return false;
358 }
359
360 @Override
361 void add(Result r) {
362
363 this.results.add(this.current);
364 }
365 };
366 fullScan(connection, visitor, getTableStartRowForMeta(tableName));
367
368 return visitor.getResults().size() >= 1;
369 }
370
371
372
373
374
375
376
377
378
379 public static List<HRegionInfo> getTableRegions(ZooKeeperWatcher zkw,
380 Connection connection, TableName tableName)
381 throws IOException {
382 return getTableRegions(zkw, connection, tableName, false);
383 }
384
385
386
387
388
389
390
391
392
393
394
395 public static List<HRegionInfo> getTableRegions(ZooKeeperWatcher zkw,
396 Connection connection, TableName tableName, final boolean excludeOfflinedSplitParents)
397 throws IOException {
398 List<Pair<HRegionInfo, ServerName>> result = null;
399 result = getTableRegionsAndLocations(zkw, connection, tableName,
400 excludeOfflinedSplitParents);
401 return getListOfHRegionInfos(result);
402 }
403
404 static List<HRegionInfo> getListOfHRegionInfos(final List<Pair<HRegionInfo, ServerName>> pairs) {
405 if (pairs == null || pairs.isEmpty()) return null;
406 List<HRegionInfo> result = new ArrayList<HRegionInfo>(pairs.size());
407 for (Pair<HRegionInfo, ServerName> pair: pairs) {
408 result.add(pair.getFirst());
409 }
410 return result;
411 }
412
413
414
415
416
417
418
419 static boolean isInsideTable(final HRegionInfo current, final TableName tableName) {
420 return tableName.equals(current.getTable());
421 }
422
423
424
425
426
427
428 static byte [] getTableStartRowForMeta(TableName tableName) {
429 byte [] startRow = new byte[tableName.getName().length + 2];
430 System.arraycopy(tableName.getName(), 0, startRow, 0, tableName.getName().length);
431 startRow[startRow.length - 2] = HConstants.DELIMITER;
432 startRow[startRow.length - 1] = HConstants.DELIMITER;
433 return startRow;
434 }
435
436
437
438
439
440
441
442
443
444
445 public static Scan getScanForTableName(TableName tableName) {
446 String strName = tableName.getNameAsString();
447
448 byte[] startKey = Bytes.toBytes(strName + ",,");
449
450 byte[] stopKey = Bytes.toBytes(strName + " ,,");
451
452 Scan scan = new Scan(startKey);
453 scan.setStopRow(stopKey);
454 return scan;
455 }
456
457
458
459
460
461
462
463
464 public static List<Pair<HRegionInfo, ServerName>>
465 getTableRegionsAndLocations(ZooKeeperWatcher zkw,
466 Connection connection, TableName tableName)
467 throws IOException {
468 return getTableRegionsAndLocations(zkw, connection, tableName, true);
469 }
470
471
472
473
474
475
476
477
478 public static List<Pair<HRegionInfo, ServerName>> getTableRegionsAndLocations(
479 ZooKeeperWatcher zkw, Connection connection, final TableName tableName,
480 final boolean excludeOfflinedSplitParents) throws IOException {
481
482 if (tableName.equals(TableName.META_TABLE_NAME)) {
483
484 ServerName serverName = new MetaTableLocator().getMetaRegionLocation(zkw);
485 List<Pair<HRegionInfo, ServerName>> list =
486 new ArrayList<Pair<HRegionInfo, ServerName>>();
487 list.add(new Pair<HRegionInfo, ServerName>(HRegionInfo.FIRST_META_REGIONINFO,
488 serverName));
489 return list;
490 }
491
492 CollectingVisitor<Pair<HRegionInfo, ServerName>> visitor =
493 new CollectingVisitor<Pair<HRegionInfo, ServerName>>() {
494 private RegionLocations current = null;
495
496 @Override
497 public boolean visit(Result r) throws IOException {
498 current = getRegionLocations(r);
499 if (current == null || current.getRegionLocation().getRegionInfo() == null) {
500 LOG.warn("No serialized HRegionInfo in " + r);
501 return true;
502 }
503 HRegionInfo hri = current.getRegionLocation().getRegionInfo();
504 if (!isInsideTable(hri, tableName)) return false;
505 if (excludeOfflinedSplitParents && hri.isSplitParent()) return true;
506
507 return super.visit(r);
508 }
509
510 @Override
511 void add(Result r) {
512 if (current == null) {
513 return;
514 }
515 for (HRegionLocation loc : current.getRegionLocations()) {
516 if (loc != null) {
517 this.results.add(new Pair<HRegionInfo, ServerName>(
518 loc.getRegionInfo(), loc.getServerName()));
519 }
520 }
521 }
522 };
523 fullScan(connection, visitor, getTableStartRowForMeta(tableName));
524 return visitor.getResults();
525 }
526
527
528
529
530
531
532
533
534 public static NavigableMap<HRegionInfo, Result>
535 getServerUserRegions(Connection connection, final ServerName serverName)
536 throws IOException {
537 final NavigableMap<HRegionInfo, Result> hris = new TreeMap<HRegionInfo, Result>();
538
539
540 CollectingVisitor<Result> v = new CollectingVisitor<Result>() {
541 @Override
542 void add(Result r) {
543 if (r == null || r.isEmpty()) return;
544 RegionLocations locations = getRegionLocations(r);
545 if (locations == null) return;
546 for (HRegionLocation loc : locations.getRegionLocations()) {
547 if (loc != null) {
548 if (loc.getServerName() != null && loc.getServerName().equals(serverName)) {
549 hris.put(loc.getRegionInfo(), r);
550 }
551 }
552 }
553 }
554 };
555 fullScan(connection, v);
556 return hris;
557 }
558
559 public static void fullScanMetaAndPrint(Connection connection)
560 throws IOException {
561 Visitor v = new Visitor() {
562 @Override
563 public boolean visit(Result r) throws IOException {
564 if (r == null || r.isEmpty()) return true;
565 LOG.info("fullScanMetaAndPrint.Current Meta Row: " + r);
566 RegionLocations locations = getRegionLocations(r);
567 if (locations == null) return true;
568 for (HRegionLocation loc : locations.getRegionLocations()) {
569 if (loc != null) {
570 LOG.info("fullScanMetaAndPrint.HRI Print= " + loc.getRegionInfo());
571 }
572 }
573 return true;
574 }
575 };
576 fullScan(connection, v);
577 }
578
579
580
581
582
583
584
585
586
587
588 public static void fullScan(Connection connection,
589 final Visitor visitor, final byte [] startrow)
590 throws IOException {
591 Scan scan = new Scan();
592 if (startrow != null) scan.setStartRow(startrow);
593 if (startrow == null) {
594 int caching = connection.getConfiguration()
595 .getInt(HConstants.HBASE_META_SCANNER_CACHING, 100);
596 scan.setCaching(caching);
597 }
598 scan.addFamily(HConstants.CATALOG_FAMILY);
599 Table metaTable = getMetaHTable(connection);
600 ResultScanner scanner = null;
601 try {
602 scanner = metaTable.getScanner(scan);
603 Result data;
604 while((data = scanner.next()) != null) {
605 if (data.isEmpty()) continue;
606
607 if (!visitor.visit(data)) break;
608 }
609 } finally {
610 if (scanner != null) scanner.close();
611 metaTable.close();
612 }
613 }
614
615
616
617
618
619 protected static byte[] getFamily() {
620 return HConstants.CATALOG_FAMILY;
621 }
622
623
624
625
626
627 protected static byte[] getRegionInfoColumn() {
628 return HConstants.REGIONINFO_QUALIFIER;
629 }
630
631
632
633
634
635
636 @VisibleForTesting
637 public static byte[] getServerColumn(int replicaId) {
638 return replicaId == 0
639 ? HConstants.SERVER_QUALIFIER
640 : Bytes.toBytes(HConstants.SERVER_QUALIFIER_STR + META_REPLICA_ID_DELIMITER
641 + String.format(HRegionInfo.REPLICA_ID_FORMAT, replicaId));
642 }
643
644
645
646
647
648
649 @VisibleForTesting
650 public static byte[] getStartCodeColumn(int replicaId) {
651 return replicaId == 0
652 ? HConstants.STARTCODE_QUALIFIER
653 : Bytes.toBytes(HConstants.STARTCODE_QUALIFIER_STR + META_REPLICA_ID_DELIMITER
654 + String.format(HRegionInfo.REPLICA_ID_FORMAT, replicaId));
655 }
656
657
658
659
660
661
662 @VisibleForTesting
663 public static byte[] getSeqNumColumn(int replicaId) {
664 return replicaId == 0
665 ? HConstants.SEQNUM_QUALIFIER
666 : Bytes.toBytes(HConstants.SEQNUM_QUALIFIER_STR + META_REPLICA_ID_DELIMITER
667 + String.format(HRegionInfo.REPLICA_ID_FORMAT, replicaId));
668 }
669
670
671
672
673
674
675
676 @VisibleForTesting
677 static int parseReplicaIdFromServerColumn(byte[] serverColumn) {
678 String serverStr = Bytes.toString(serverColumn);
679
680 Matcher matcher = SERVER_COLUMN_PATTERN.matcher(serverStr);
681 if (matcher.matches() && matcher.groupCount() > 0) {
682 String group = matcher.group(1);
683 if (group != null && group.length() > 0) {
684 return Integer.parseInt(group.substring(1), 16);
685 } else {
686 return 0;
687 }
688 }
689 return -1;
690 }
691
692
693
694
695
696
697 private static ServerName getServerName(final Result r, final int replicaId) {
698 byte[] serverColumn = getServerColumn(replicaId);
699 Cell cell = r.getColumnLatestCell(getFamily(), serverColumn);
700 if (cell == null || cell.getValueLength() == 0) return null;
701 String hostAndPort = Bytes.toString(
702 cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());
703 byte[] startcodeColumn = getStartCodeColumn(replicaId);
704 cell = r.getColumnLatestCell(getFamily(), startcodeColumn);
705 if (cell == null || cell.getValueLength() == 0) return null;
706 return ServerName.valueOf(hostAndPort,
707 Bytes.toLong(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
708 }
709
710
711
712
713
714
715
716 private static long getSeqNumDuringOpen(final Result r, final int replicaId) {
717 Cell cell = r.getColumnLatestCell(getFamily(), getSeqNumColumn(replicaId));
718 if (cell == null || cell.getValueLength() == 0) return HConstants.NO_SEQNUM;
719 return Bytes.toLong(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());
720 }
721
722
723
724
725
726
727 public static RegionLocations getRegionLocations(final Result r) {
728 if (r == null) return null;
729 HRegionInfo regionInfo = getHRegionInfo(r, getRegionInfoColumn());
730 if (regionInfo == null) return null;
731
732 List<HRegionLocation> locations = new ArrayList<HRegionLocation>(1);
733 NavigableMap<byte[],NavigableMap<byte[],byte[]>> familyMap = r.getNoVersionMap();
734
735 locations.add(getRegionLocation(r, regionInfo, 0));
736
737 NavigableMap<byte[], byte[]> infoMap = familyMap.get(getFamily());
738 if (infoMap == null) return new RegionLocations(locations);
739
740
741 int replicaId = 0;
742 byte[] serverColumn = getServerColumn(replicaId);
743 SortedMap<byte[], byte[]> serverMap = null;
744 serverMap = infoMap.tailMap(serverColumn, false);
745
746 if (serverMap.isEmpty()) return new RegionLocations(locations);
747
748 for (Map.Entry<byte[], byte[]> entry : serverMap.entrySet()) {
749 replicaId = parseReplicaIdFromServerColumn(entry.getKey());
750 if (replicaId < 0) {
751 break;
752 }
753 HRegionLocation location = getRegionLocation(r, regionInfo, replicaId);
754
755
756 if (location == null || location.getServerName() == null) {
757 locations.add(null);
758 } else {
759 locations.add(location);
760 }
761 }
762
763 return new RegionLocations(locations);
764 }
765
766
767
768
769
770
771
772
773
774
775 private static HRegionLocation getRegionLocation(final Result r, final HRegionInfo regionInfo,
776 final int replicaId) {
777 ServerName serverName = getServerName(r, replicaId);
778 long seqNum = getSeqNumDuringOpen(r, replicaId);
779 HRegionInfo replicaInfo = RegionReplicaUtil.getRegionInfoForReplica(regionInfo, replicaId);
780 return new HRegionLocation(replicaInfo, serverName, seqNum);
781 }
782
783
784
785
786
787
788
789
790 public static HRegionInfo getHRegionInfo(Result data) {
791 return getHRegionInfo(data, HConstants.REGIONINFO_QUALIFIER);
792 }
793
794
795
796
797
798
799
800
801 private static HRegionInfo getHRegionInfo(final Result r, byte [] qualifier) {
802 Cell cell = r.getColumnLatestCell(getFamily(), qualifier);
803 if (cell == null) return null;
804 return HRegionInfo.parseFromOrNull(cell.getValueArray(),
805 cell.getValueOffset(), cell.getValueLength());
806 }
807
808
809
810
811
812
813
814
815 public static PairOfSameType<HRegionInfo> getDaughterRegions(Result data) {
816 HRegionInfo splitA = getHRegionInfo(data, HConstants.SPLITA_QUALIFIER);
817 HRegionInfo splitB = getHRegionInfo(data, HConstants.SPLITB_QUALIFIER);
818
819 return new PairOfSameType<HRegionInfo>(splitA, splitB);
820 }
821
822
823
824
825
826
827
828
829 public static PairOfSameType<HRegionInfo> getMergeRegions(Result data) {
830 HRegionInfo mergeA = getHRegionInfo(data, HConstants.MERGEA_QUALIFIER);
831 HRegionInfo mergeB = getHRegionInfo(data, HConstants.MERGEB_QUALIFIER);
832
833 return new PairOfSameType<HRegionInfo>(mergeA, mergeB);
834 }
835
836
837
838
839 public interface Visitor {
840
841
842
843
844
845
846 boolean visit(final Result r) throws IOException;
847 }
848
849
850
851
852 public static abstract class DefaultVisitorBase implements Visitor {
853
854 public DefaultVisitorBase() {
855 super();
856 }
857
858 public abstract boolean visitInternal(Result rowResult) throws IOException;
859
860 @Override
861 public boolean visit(Result rowResult) throws IOException {
862 HRegionInfo info = getHRegionInfo(rowResult);
863 if (info == null) {
864 return true;
865 }
866
867
868 if (!(info.isOffline() || info.isSplit())) {
869 return visitInternal(rowResult);
870 }
871 return true;
872 }
873 }
874
875
876
877
878 static abstract class CollectingVisitor<T> implements Visitor {
879 final List<T> results = new ArrayList<T>();
880 @Override
881 public boolean visit(Result r) throws IOException {
882 if (r == null || r.isEmpty()) return true;
883 add(r);
884 return true;
885 }
886
887 abstract void add(Result r);
888
889
890
891
892
893 List<T> getResults() {
894 return this.results;
895 }
896 }
897
898
899
900
901 static class CollectAllVisitor extends CollectingVisitor<Result> {
902 @Override
903 void add(Result r) {
904 this.results.add(r);
905 }
906 }
907
908
909
910
911
912
913
914
915 @Deprecated
916 public static int getRegionCount(final Configuration c, final String tableName)
917 throws IOException {
918 return getRegionCount(c, TableName.valueOf(tableName));
919 }
920
921
922
923
924
925
926
927
928 public static int getRegionCount(final Configuration c, final TableName tableName)
929 throws IOException {
930 try (Connection connection = ConnectionFactory.createConnection(c)) {
931 return getRegionCount(connection, tableName);
932 }
933 }
934
935
936
937
938
939
940
941
942 public static int getRegionCount(final Connection connection, final TableName tableName)
943 throws IOException {
944 try (RegionLocator locator = connection.getRegionLocator(tableName)) {
945 List<HRegionLocation> locations = locator.getAllRegionLocations();
946 return locations == null? 0: locations.size();
947 }
948 }
949
950
951
952
953
954
955
956
957 public static Put makePutFromRegionInfo(HRegionInfo regionInfo)
958 throws IOException {
959 return makePutFromRegionInfo(regionInfo, HConstants.LATEST_TIMESTAMP);
960 }
961
962
963
964 public static Put makePutFromRegionInfo(HRegionInfo regionInfo, long ts)
965 throws IOException {
966 Put put = new Put(regionInfo.getRegionName(), ts);
967 addRegionInfo(put, regionInfo);
968 return put;
969 }
970
971
972
973
974
975 public static Delete makeDeleteFromRegionInfo(HRegionInfo regionInfo) {
976 return makeDeleteFromRegionInfo(regionInfo, HConstants.LATEST_TIMESTAMP);
977 }
978
979
980
981
982
983 public static Delete makeDeleteFromRegionInfo(HRegionInfo regionInfo, long ts) {
984 if (regionInfo == null) {
985 throw new IllegalArgumentException("Can't make a delete for null region");
986 }
987 Delete delete = new Delete(regionInfo.getRegionName(), ts);
988 return delete;
989 }
990
991
992
993
994 public static Put addDaughtersToPut(Put put, HRegionInfo splitA, HRegionInfo splitB) {
995 if (splitA != null) {
996 put.addImmutable(
997 HConstants.CATALOG_FAMILY, HConstants.SPLITA_QUALIFIER, splitA.toByteArray());
998 }
999 if (splitB != null) {
1000 put.addImmutable(
1001 HConstants.CATALOG_FAMILY, HConstants.SPLITB_QUALIFIER, splitB.toByteArray());
1002 }
1003 return put;
1004 }
1005
1006
1007
1008
1009
1010
1011
1012 static void putToMetaTable(final Connection connection, final Put p)
1013 throws IOException {
1014 put(getMetaHTable(connection), p);
1015 }
1016
1017
1018
1019
1020
1021
1022 private static void put(final Table t, final Put p) throws IOException {
1023 try {
1024 t.put(p);
1025 } finally {
1026 t.close();
1027 }
1028 }
1029
1030
1031
1032
1033
1034
1035
1036 public static void putsToMetaTable(final Connection connection, final List<Put> ps)
1037 throws IOException {
1038 Table t = getMetaHTable(connection);
1039 try {
1040 t.put(ps);
1041 } finally {
1042 t.close();
1043 }
1044 }
1045
1046
1047
1048
1049
1050
1051
1052 static void deleteFromMetaTable(final Connection connection, final Delete d)
1053 throws IOException {
1054 List<Delete> dels = new ArrayList<Delete>(1);
1055 dels.add(d);
1056 deleteFromMetaTable(connection, dels);
1057 }
1058
1059
1060
1061
1062
1063
1064
1065 public static void deleteFromMetaTable(final Connection connection, final List<Delete> deletes)
1066 throws IOException {
1067 Table t = getMetaHTable(connection);
1068 try {
1069 t.delete(deletes);
1070 } finally {
1071 t.close();
1072 }
1073 }
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083 public static void removeRegionReplicasFromMeta(Set<byte[]> metaRows,
1084 int replicaIndexToDeleteFrom, int numReplicasToRemove, Connection connection)
1085 throws IOException {
1086 int absoluteIndex = replicaIndexToDeleteFrom + numReplicasToRemove;
1087 for (byte[] row : metaRows) {
1088 Delete deleteReplicaLocations = new Delete(row);
1089 for (int i = replicaIndexToDeleteFrom; i < absoluteIndex; i++) {
1090 deleteReplicaLocations.deleteColumns(HConstants.CATALOG_FAMILY,
1091 getServerColumn(i));
1092 deleteReplicaLocations.deleteColumns(HConstants.CATALOG_FAMILY,
1093 getSeqNumColumn(i));
1094 deleteReplicaLocations.deleteColumns(HConstants.CATALOG_FAMILY,
1095 getStartCodeColumn(i));
1096 }
1097 deleteFromMetaTable(connection, deleteReplicaLocations);
1098 }
1099 }
1100
1101
1102
1103
1104
1105
1106
1107 public static void mutateMetaTable(final Connection connection,
1108 final List<Mutation> mutations)
1109 throws IOException {
1110 Table t = getMetaHTable(connection);
1111 try {
1112 t.batch(mutations);
1113 } catch (InterruptedException e) {
1114 InterruptedIOException ie = new InterruptedIOException(e.getMessage());
1115 ie.initCause(e);
1116 throw ie;
1117 } finally {
1118 t.close();
1119 }
1120 }
1121
1122
1123
1124
1125
1126
1127
1128 public static void addRegionToMeta(Connection connection,
1129 HRegionInfo regionInfo)
1130 throws IOException {
1131 putToMetaTable(connection, makePutFromRegionInfo(regionInfo));
1132 LOG.info("Added " + regionInfo.getRegionNameAsString());
1133 }
1134
1135
1136
1137
1138
1139
1140
1141
1142 public static void addRegionToMeta(Table meta, HRegionInfo regionInfo) throws IOException {
1143 addRegionToMeta(meta, regionInfo, null, null);
1144 }
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158 public static void addRegionToMeta(Table meta, HRegionInfo regionInfo,
1159 HRegionInfo splitA, HRegionInfo splitB) throws IOException {
1160 Put put = makePutFromRegionInfo(regionInfo);
1161 addDaughtersToPut(put, splitA, splitB);
1162 meta.put(put);
1163 if (LOG.isDebugEnabled()) {
1164 LOG.debug("Added " + regionInfo.getRegionNameAsString());
1165 }
1166 }
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180 public static void addRegionToMeta(Connection connection, HRegionInfo regionInfo,
1181 HRegionInfo splitA, HRegionInfo splitB) throws IOException {
1182 Table meta = getMetaHTable(connection);
1183 try {
1184 addRegionToMeta(meta, regionInfo, splitA, splitB);
1185 } finally {
1186 meta.close();
1187 }
1188 }
1189
1190
1191
1192
1193
1194
1195
1196 public static void addRegionsToMeta(Connection connection,
1197 List<HRegionInfo> regionInfos, int regionReplication)
1198 throws IOException {
1199 addRegionsToMeta(connection, regionInfos, regionReplication, HConstants.LATEST_TIMESTAMP);
1200 }
1201
1202
1203
1204
1205
1206
1207
1208
1209 public static void addRegionsToMeta(Connection connection,
1210 List<HRegionInfo> regionInfos, int regionReplication, long ts)
1211 throws IOException {
1212 List<Put> puts = new ArrayList<Put>();
1213 for (HRegionInfo regionInfo : regionInfos) {
1214 if (RegionReplicaUtil.isDefaultReplica(regionInfo)) {
1215 Put put = makePutFromRegionInfo(regionInfo, ts);
1216
1217
1218 for (int i = 1; i < regionReplication; i++) {
1219 addEmptyLocation(put, i);
1220 }
1221 puts.add(put);
1222 }
1223 }
1224 putsToMetaTable(connection, puts);
1225 LOG.info("Added " + puts.size());
1226 }
1227
1228
1229
1230
1231
1232
1233
1234 public static void addDaughter(final Connection connection,
1235 final HRegionInfo regionInfo, final ServerName sn, final long openSeqNum)
1236 throws NotAllMetaRegionsOnlineException, IOException {
1237 Put put = new Put(regionInfo.getRegionName());
1238 addRegionInfo(put, regionInfo);
1239 if (sn != null) {
1240 addLocation(put, sn, openSeqNum, -1, regionInfo.getReplicaId());
1241 }
1242 putToMetaTable(connection, put);
1243 LOG.info("Added daughter " + regionInfo.getEncodedName() +
1244 (sn == null? ", serverName=null": ", serverName=" + sn.toString()));
1245 }
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259 public static void mergeRegions(final Connection connection, HRegionInfo mergedRegion,
1260 HRegionInfo regionA, HRegionInfo regionB, ServerName sn, int regionReplication,
1261 long masterSystemTime)
1262 throws IOException {
1263 Table meta = getMetaHTable(connection);
1264 try {
1265 HRegionInfo copyOfMerged = new HRegionInfo(mergedRegion);
1266
1267
1268 long time = Math.max(EnvironmentEdgeManager.currentTime(), masterSystemTime);
1269
1270
1271 Put putOfMerged = makePutFromRegionInfo(copyOfMerged, time);
1272 putOfMerged.addImmutable(HConstants.CATALOG_FAMILY, HConstants.MERGEA_QUALIFIER,
1273 regionA.toByteArray());
1274 putOfMerged.addImmutable(HConstants.CATALOG_FAMILY, HConstants.MERGEB_QUALIFIER,
1275 regionB.toByteArray());
1276
1277
1278 Delete deleteA = makeDeleteFromRegionInfo(regionA, time);
1279 Delete deleteB = makeDeleteFromRegionInfo(regionB, time);
1280
1281
1282 addLocation(putOfMerged, sn, 1, -1, mergedRegion.getReplicaId());
1283
1284
1285
1286 for (int i = 1; i < regionReplication; i++) {
1287 addEmptyLocation(putOfMerged, i);
1288 }
1289
1290 byte[] tableRow = Bytes.toBytes(mergedRegion.getRegionNameAsString()
1291 + HConstants.DELIMITER);
1292 multiMutate(meta, tableRow, putOfMerged, deleteA, deleteB);
1293 } finally {
1294 meta.close();
1295 }
1296 }
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309 public static void splitRegion(final Connection connection,
1310 HRegionInfo parent, HRegionInfo splitA, HRegionInfo splitB,
1311 ServerName sn, int regionReplication) throws IOException {
1312 Table meta = getMetaHTable(connection);
1313 try {
1314 HRegionInfo copyOfParent = new HRegionInfo(parent);
1315 copyOfParent.setOffline(true);
1316 copyOfParent.setSplit(true);
1317
1318
1319 Put putParent = makePutFromRegionInfo(copyOfParent);
1320 addDaughtersToPut(putParent, splitA, splitB);
1321
1322
1323 Put putA = makePutFromRegionInfo(splitA);
1324 Put putB = makePutFromRegionInfo(splitB);
1325
1326 addLocation(putA, sn, 1, -1, splitA.getReplicaId());
1327 addLocation(putB, sn, 1, -1, splitB.getReplicaId());
1328
1329
1330
1331 for (int i = 1; i < regionReplication; i++) {
1332 addEmptyLocation(putA, i);
1333 addEmptyLocation(putB, i);
1334 }
1335
1336 byte[] tableRow = Bytes.toBytes(parent.getRegionNameAsString() + HConstants.DELIMITER);
1337 multiMutate(meta, tableRow, putParent, putA, putB);
1338 } finally {
1339 meta.close();
1340 }
1341 }
1342
1343
1344
1345
1346 private static void multiMutate(Table table, byte[] row, Mutation... mutations)
1347 throws IOException {
1348 CoprocessorRpcChannel channel = table.coprocessorService(row);
1349 MultiRowMutationProtos.MutateRowsRequest.Builder mmrBuilder
1350 = MultiRowMutationProtos.MutateRowsRequest.newBuilder();
1351 for (Mutation mutation : mutations) {
1352 if (mutation instanceof Put) {
1353 mmrBuilder.addMutationRequest(ProtobufUtil.toMutation(
1354 ClientProtos.MutationProto.MutationType.PUT, mutation));
1355 } else if (mutation instanceof Delete) {
1356 mmrBuilder.addMutationRequest(ProtobufUtil.toMutation(
1357 ClientProtos.MutationProto.MutationType.DELETE, mutation));
1358 } else {
1359 throw new DoNotRetryIOException("multi in MetaEditor doesn't support "
1360 + mutation.getClass().getName());
1361 }
1362 }
1363
1364 MultiRowMutationProtos.MultiRowMutationService.BlockingInterface service =
1365 MultiRowMutationProtos.MultiRowMutationService.newBlockingStub(channel);
1366 try {
1367 service.mutateRows(null, mmrBuilder.build());
1368 } catch (ServiceException ex) {
1369 ProtobufUtil.toIOException(ex);
1370 }
1371 }
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387 public static void updateRegionLocation(Connection connection,
1388 HRegionInfo regionInfo, ServerName sn, long openSeqNum,
1389 long masterSystemTime)
1390 throws IOException {
1391 updateLocation(connection, regionInfo, sn, openSeqNum, masterSystemTime);
1392 }
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408 private static void updateLocation(final Connection connection,
1409 HRegionInfo regionInfo, ServerName sn, long openSeqNum,
1410 long masterSystemTime)
1411 throws IOException {
1412
1413
1414 long time = Math.max(EnvironmentEdgeManager.currentTime(), masterSystemTime);
1415
1416
1417 Put put = new Put(getMetaKeyForRegion(regionInfo), time);
1418 addLocation(put, sn, openSeqNum, time, regionInfo.getReplicaId());
1419 putToMetaTable(connection, put);
1420 LOG.info("Updated row " + regionInfo.getRegionNameAsString() +
1421 " with server=" + sn);
1422 }
1423
1424
1425
1426
1427
1428
1429
1430 public static void deleteRegion(Connection connection,
1431 HRegionInfo regionInfo)
1432 throws IOException {
1433 Delete delete = new Delete(regionInfo.getRegionName());
1434 deleteFromMetaTable(connection, delete);
1435 LOG.info("Deleted " + regionInfo.getRegionNameAsString());
1436 }
1437
1438
1439
1440
1441
1442
1443
1444
1445 public static void deleteRegions(Connection connection,
1446 List<HRegionInfo> regionsInfo, long ts) throws IOException {
1447 List<Delete> deletes = new ArrayList<Delete>(regionsInfo.size());
1448 for (HRegionInfo hri: regionsInfo) {
1449 deletes.add(new Delete(hri.getRegionName(), ts));
1450 }
1451 deleteFromMetaTable(connection, deletes);
1452 LOG.info("Deleted " + regionsInfo);
1453 }
1454
1455
1456
1457
1458
1459
1460 public static void deleteRegions(Connection connection,
1461 List<HRegionInfo> regionsInfo) throws IOException {
1462 deleteRegions(connection, regionsInfo, HConstants.LATEST_TIMESTAMP);
1463 }
1464
1465
1466
1467
1468
1469
1470
1471
1472 public static void mutateRegions(Connection connection,
1473 final List<HRegionInfo> regionsToRemove,
1474 final List<HRegionInfo> regionsToAdd)
1475 throws IOException {
1476 List<Mutation> mutation = new ArrayList<Mutation>();
1477 if (regionsToRemove != null) {
1478 for (HRegionInfo hri: regionsToRemove) {
1479 mutation.add(new Delete(hri.getRegionName()));
1480 }
1481 }
1482 if (regionsToAdd != null) {
1483 for (HRegionInfo hri: regionsToAdd) {
1484 mutation.add(makePutFromRegionInfo(hri));
1485 }
1486 }
1487 mutateMetaTable(connection, mutation);
1488 if (regionsToRemove != null && regionsToRemove.size() > 0) {
1489 LOG.debug("Deleted " + regionsToRemove);
1490 }
1491 if (regionsToAdd != null && regionsToAdd.size() > 0) {
1492 LOG.debug("Added " + regionsToAdd);
1493 }
1494 }
1495
1496
1497
1498
1499
1500
1501
1502 public static void overwriteRegions(Connection connection,
1503 List<HRegionInfo> regionInfos, int regionReplication) throws IOException {
1504
1505 long now = EnvironmentEdgeManager.currentTime();
1506 deleteRegions(connection, regionInfos, now);
1507
1508
1509
1510
1511
1512
1513 addRegionsToMeta(connection, regionInfos, regionReplication, now+1);
1514 LOG.info("Overwritten " + regionInfos);
1515 }
1516
1517
1518
1519
1520
1521
1522
1523 public static void deleteMergeQualifiers(Connection connection,
1524 final HRegionInfo mergedRegion) throws IOException {
1525 Delete delete = new Delete(mergedRegion.getRegionName());
1526 delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.MERGEA_QUALIFIER);
1527 delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.MERGEB_QUALIFIER);
1528 deleteFromMetaTable(connection, delete);
1529 LOG.info("Deleted references in merged region "
1530 + mergedRegion.getRegionNameAsString() + ", qualifier="
1531 + Bytes.toStringBinary(HConstants.MERGEA_QUALIFIER) + " and qualifier="
1532 + Bytes.toStringBinary(HConstants.MERGEB_QUALIFIER));
1533 }
1534
1535 private static Put addRegionInfo(final Put p, final HRegionInfo hri)
1536 throws IOException {
1537 p.addImmutable(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER,
1538 hri.toByteArray());
1539 return p;
1540 }
1541
1542 public static Put addLocation(final Put p, final ServerName sn, long openSeqNum,
1543 long time, int replicaId){
1544 if (time <= 0) {
1545 time = EnvironmentEdgeManager.currentTime();
1546 }
1547 p.addImmutable(HConstants.CATALOG_FAMILY, getServerColumn(replicaId), time,
1548 Bytes.toBytes(sn.getHostAndPort()));
1549 p.addImmutable(HConstants.CATALOG_FAMILY, getStartCodeColumn(replicaId), time,
1550 Bytes.toBytes(sn.getStartcode()));
1551 p.addImmutable(HConstants.CATALOG_FAMILY, getSeqNumColumn(replicaId), time,
1552 Bytes.toBytes(openSeqNum));
1553 return p;
1554 }
1555
1556 public static Put addEmptyLocation(final Put p, int replicaId) {
1557 long now = EnvironmentEdgeManager.currentTime();
1558 p.addImmutable(HConstants.CATALOG_FAMILY, getServerColumn(replicaId), now, null);
1559 p.addImmutable(HConstants.CATALOG_FAMILY, getStartCodeColumn(replicaId), now, null);
1560 p.addImmutable(HConstants.CATALOG_FAMILY, getSeqNumColumn(replicaId), now, null);
1561 return p;
1562 }
1563 }