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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
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70
71
72
73 @InterfaceAudience.Private
74 public class MetaTableAccessor {
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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
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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
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150
151
152
153 public static void fullScan(Connection connection,
154 final Visitor visitor)
155 throws IOException {
156 fullScan(connection, visitor, null);
157 }
158
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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
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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
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218
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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 }
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234
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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
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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
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325
326
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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
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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 }
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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 }
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413
414
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416
417
418
419 static boolean isInsideTable(final HRegionInfo current, final TableName tableName) {
420 return tableName.equals(current.getTable());
421 }
422
423
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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
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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 }
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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
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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 = infoMap.tailMap(serverColumn, false);
744 if (serverMap.isEmpty()) return new RegionLocations(locations);
745
746 for (Map.Entry<byte[], byte[]> entry : serverMap.entrySet()) {
747 replicaId = parseReplicaIdFromServerColumn(entry.getKey());
748 if (replicaId < 0) {
749 break;
750 }
751 HRegionLocation location = getRegionLocation(r, regionInfo, replicaId);
752
753
754 if (location == null || location.getServerName() == null) {
755 locations.add(null);
756 } else {
757 locations.add(location);
758 }
759 }
760
761 return new RegionLocations(locations);
762 }
763
764
765
766
767
768
769
770
771
772
773 private static HRegionLocation getRegionLocation(final Result r, final HRegionInfo regionInfo,
774 final int replicaId) {
775 ServerName serverName = getServerName(r, replicaId);
776 long seqNum = getSeqNumDuringOpen(r, replicaId);
777 HRegionInfo replicaInfo = RegionReplicaUtil.getRegionInfoForReplica(regionInfo, replicaId);
778 return new HRegionLocation(replicaInfo, serverName, seqNum);
779 }
780
781
782
783
784
785
786
787
788 public static HRegionInfo getHRegionInfo(Result data) {
789 return getHRegionInfo(data, HConstants.REGIONINFO_QUALIFIER);
790 }
791
792
793
794
795
796
797
798
799 private static HRegionInfo getHRegionInfo(final Result r, byte [] qualifier) {
800 Cell cell = r.getColumnLatestCell(getFamily(), qualifier);
801 if (cell == null) return null;
802 return HRegionInfo.parseFromOrNull(cell.getValueArray(),
803 cell.getValueOffset(), cell.getValueLength());
804 }
805
806
807
808
809
810
811
812
813 public static PairOfSameType<HRegionInfo> getDaughterRegions(Result data) {
814 HRegionInfo splitA = getHRegionInfo(data, HConstants.SPLITA_QUALIFIER);
815 HRegionInfo splitB = getHRegionInfo(data, HConstants.SPLITB_QUALIFIER);
816
817 return new PairOfSameType<HRegionInfo>(splitA, splitB);
818 }
819
820
821
822
823
824
825
826
827 public static PairOfSameType<HRegionInfo> getMergeRegions(Result data) {
828 HRegionInfo mergeA = getHRegionInfo(data, HConstants.MERGEA_QUALIFIER);
829 HRegionInfo mergeB = getHRegionInfo(data, HConstants.MERGEB_QUALIFIER);
830
831 return new PairOfSameType<HRegionInfo>(mergeA, mergeB);
832 }
833
834
835
836
837 public interface Visitor {
838
839
840
841
842
843
844 boolean visit(final Result r) throws IOException;
845 }
846
847
848
849
850 static abstract class CollectingVisitor<T> implements Visitor {
851 final List<T> results = new ArrayList<T>();
852 @Override
853 public boolean visit(Result r) throws IOException {
854 if (r == null || r.isEmpty()) return true;
855 add(r);
856 return true;
857 }
858
859 abstract void add(Result r);
860
861
862
863
864
865 List<T> getResults() {
866 return this.results;
867 }
868 }
869
870
871
872
873 static class CollectAllVisitor extends CollectingVisitor<Result> {
874 @Override
875 void add(Result r) {
876 this.results.add(r);
877 }
878 }
879
880
881
882
883
884
885
886
887 @Deprecated
888 public static int getRegionCount(final Configuration c, final String tableName)
889 throws IOException {
890 return getRegionCount(c, TableName.valueOf(tableName));
891 }
892
893
894
895
896
897
898
899
900 public static int getRegionCount(final Configuration c, final TableName tableName)
901 throws IOException {
902 try (Connection connection = ConnectionFactory.createConnection(c)) {
903 return getRegionCount(connection, tableName);
904 }
905 }
906
907
908
909
910
911
912
913
914 public static int getRegionCount(final Connection connection, final TableName tableName)
915 throws IOException {
916 try (RegionLocator locator = connection.getRegionLocator(tableName)) {
917 List<HRegionLocation> locations = locator.getAllRegionLocations();
918 return locations == null? 0: locations.size();
919 }
920 }
921
922
923
924
925
926
927
928
929 public static Put makePutFromRegionInfo(HRegionInfo regionInfo)
930 throws IOException {
931 return makePutFromRegionInfo(regionInfo, HConstants.LATEST_TIMESTAMP);
932 }
933
934
935
936 public static Put makePutFromRegionInfo(HRegionInfo regionInfo, long ts)
937 throws IOException {
938 Put put = new Put(regionInfo.getRegionName(), ts);
939 addRegionInfo(put, regionInfo);
940 return put;
941 }
942
943
944
945
946
947 public static Delete makeDeleteFromRegionInfo(HRegionInfo regionInfo) {
948 return makeDeleteFromRegionInfo(regionInfo, HConstants.LATEST_TIMESTAMP);
949 }
950
951
952
953
954
955 public static Delete makeDeleteFromRegionInfo(HRegionInfo regionInfo, long ts) {
956 if (regionInfo == null) {
957 throw new IllegalArgumentException("Can't make a delete for null region");
958 }
959 Delete delete = new Delete(regionInfo.getRegionName(), ts);
960 return delete;
961 }
962
963
964
965
966 public static Put addDaughtersToPut(Put put, HRegionInfo splitA, HRegionInfo splitB) {
967 if (splitA != null) {
968 put.addImmutable(
969 HConstants.CATALOG_FAMILY, HConstants.SPLITA_QUALIFIER, splitA.toByteArray());
970 }
971 if (splitB != null) {
972 put.addImmutable(
973 HConstants.CATALOG_FAMILY, HConstants.SPLITB_QUALIFIER, splitB.toByteArray());
974 }
975 return put;
976 }
977
978
979
980
981
982
983
984 static void putToMetaTable(final Connection connection, final Put p)
985 throws IOException {
986 put(getMetaHTable(connection), p);
987 }
988
989
990
991
992
993
994 private static void put(final Table t, final Put p) throws IOException {
995 try {
996 t.put(p);
997 } finally {
998 t.close();
999 }
1000 }
1001
1002
1003
1004
1005
1006
1007
1008 public static void putsToMetaTable(final Connection connection, final List<Put> ps)
1009 throws IOException {
1010 Table t = getMetaHTable(connection);
1011 try {
1012 t.put(ps);
1013 } finally {
1014 t.close();
1015 }
1016 }
1017
1018
1019
1020
1021
1022
1023
1024 static void deleteFromMetaTable(final Connection connection, final Delete d)
1025 throws IOException {
1026 List<Delete> dels = new ArrayList<Delete>(1);
1027 dels.add(d);
1028 deleteFromMetaTable(connection, dels);
1029 }
1030
1031
1032
1033
1034
1035
1036
1037 public static void deleteFromMetaTable(final Connection connection, final List<Delete> deletes)
1038 throws IOException {
1039 Table t = getMetaHTable(connection);
1040 try {
1041 t.delete(deletes);
1042 } finally {
1043 t.close();
1044 }
1045 }
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055 public static void removeRegionReplicasFromMeta(Set<byte[]> metaRows,
1056 int replicaIndexToDeleteFrom, int numReplicasToRemove, Connection connection)
1057 throws IOException {
1058 int absoluteIndex = replicaIndexToDeleteFrom + numReplicasToRemove;
1059 for (byte[] row : metaRows) {
1060 Delete deleteReplicaLocations = new Delete(row);
1061 for (int i = replicaIndexToDeleteFrom; i < absoluteIndex; i++) {
1062 deleteReplicaLocations.deleteColumns(HConstants.CATALOG_FAMILY,
1063 getServerColumn(i));
1064 deleteReplicaLocations.deleteColumns(HConstants.CATALOG_FAMILY,
1065 getSeqNumColumn(i));
1066 deleteReplicaLocations.deleteColumns(HConstants.CATALOG_FAMILY,
1067 getStartCodeColumn(i));
1068 }
1069 deleteFromMetaTable(connection, deleteReplicaLocations);
1070 }
1071 }
1072
1073
1074
1075
1076
1077
1078
1079 public static void mutateMetaTable(final Connection connection,
1080 final List<Mutation> mutations)
1081 throws IOException {
1082 Table t = getMetaHTable(connection);
1083 try {
1084 t.batch(mutations);
1085 } catch (InterruptedException e) {
1086 InterruptedIOException ie = new InterruptedIOException(e.getMessage());
1087 ie.initCause(e);
1088 throw ie;
1089 } finally {
1090 t.close();
1091 }
1092 }
1093
1094
1095
1096
1097
1098
1099
1100 public static void addRegionToMeta(Connection connection,
1101 HRegionInfo regionInfo)
1102 throws IOException {
1103 putToMetaTable(connection, makePutFromRegionInfo(regionInfo));
1104 LOG.info("Added " + regionInfo.getRegionNameAsString());
1105 }
1106
1107
1108
1109
1110
1111
1112
1113
1114 public static void addRegionToMeta(Table meta, HRegionInfo regionInfo) throws IOException {
1115 addRegionToMeta(meta, regionInfo, null, null);
1116 }
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130 public static void addRegionToMeta(Table meta, HRegionInfo regionInfo,
1131 HRegionInfo splitA, HRegionInfo splitB) throws IOException {
1132 Put put = makePutFromRegionInfo(regionInfo);
1133 addDaughtersToPut(put, splitA, splitB);
1134 meta.put(put);
1135 if (LOG.isDebugEnabled()) {
1136 LOG.debug("Added " + regionInfo.getRegionNameAsString());
1137 }
1138 }
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152 public static void addRegionToMeta(Connection connection, HRegionInfo regionInfo,
1153 HRegionInfo splitA, HRegionInfo splitB) throws IOException {
1154 Table meta = getMetaHTable(connection);
1155 try {
1156 addRegionToMeta(meta, regionInfo, splitA, splitB);
1157 } finally {
1158 meta.close();
1159 }
1160 }
1161
1162
1163
1164
1165
1166
1167
1168 public static void addRegionsToMeta(Connection connection,
1169 List<HRegionInfo> regionInfos, int regionReplication)
1170 throws IOException {
1171 addRegionsToMeta(connection, regionInfos, regionReplication, HConstants.LATEST_TIMESTAMP);
1172 }
1173
1174
1175
1176
1177
1178
1179
1180
1181 public static void addRegionsToMeta(Connection connection,
1182 List<HRegionInfo> regionInfos, int regionReplication, long ts)
1183 throws IOException {
1184 List<Put> puts = new ArrayList<Put>();
1185 for (HRegionInfo regionInfo : regionInfos) {
1186 if (RegionReplicaUtil.isDefaultReplica(regionInfo)) {
1187 Put put = makePutFromRegionInfo(regionInfo, ts);
1188
1189
1190 for (int i = 1; i < regionReplication; i++) {
1191 addEmptyLocation(put, i);
1192 }
1193 puts.add(put);
1194 }
1195 }
1196 putsToMetaTable(connection, puts);
1197 LOG.info("Added " + puts.size());
1198 }
1199
1200
1201
1202
1203
1204
1205
1206 public static void addDaughter(final Connection connection,
1207 final HRegionInfo regionInfo, final ServerName sn, final long openSeqNum)
1208 throws NotAllMetaRegionsOnlineException, IOException {
1209 Put put = new Put(regionInfo.getRegionName());
1210 addRegionInfo(put, regionInfo);
1211 if (sn != null) {
1212 addLocation(put, sn, openSeqNum, -1, regionInfo.getReplicaId());
1213 }
1214 putToMetaTable(connection, put);
1215 LOG.info("Added daughter " + regionInfo.getEncodedName() +
1216 (sn == null? ", serverName=null": ", serverName=" + sn.toString()));
1217 }
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231 public static void mergeRegions(final Connection connection, HRegionInfo mergedRegion,
1232 HRegionInfo regionA, HRegionInfo regionB, ServerName sn, int regionReplication,
1233 long masterSystemTime)
1234 throws IOException {
1235 Table meta = getMetaHTable(connection);
1236 try {
1237 HRegionInfo copyOfMerged = new HRegionInfo(mergedRegion);
1238
1239
1240 long time = Math.max(EnvironmentEdgeManager.currentTime(), masterSystemTime);
1241
1242
1243 Put putOfMerged = makePutFromRegionInfo(copyOfMerged, time);
1244 putOfMerged.addImmutable(HConstants.CATALOG_FAMILY, HConstants.MERGEA_QUALIFIER,
1245 regionA.toByteArray());
1246 putOfMerged.addImmutable(HConstants.CATALOG_FAMILY, HConstants.MERGEB_QUALIFIER,
1247 regionB.toByteArray());
1248
1249
1250 Delete deleteA = makeDeleteFromRegionInfo(regionA, time);
1251 Delete deleteB = makeDeleteFromRegionInfo(regionB, time);
1252
1253
1254 addLocation(putOfMerged, sn, 1, -1, mergedRegion.getReplicaId());
1255
1256
1257
1258 for (int i = 1; i < regionReplication; i++) {
1259 addEmptyLocation(putOfMerged, i);
1260 }
1261
1262 byte[] tableRow = Bytes.toBytes(mergedRegion.getRegionNameAsString()
1263 + HConstants.DELIMITER);
1264 multiMutate(meta, tableRow, putOfMerged, deleteA, deleteB);
1265 } finally {
1266 meta.close();
1267 }
1268 }
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281 public static void splitRegion(final Connection connection,
1282 HRegionInfo parent, HRegionInfo splitA, HRegionInfo splitB,
1283 ServerName sn, int regionReplication) throws IOException {
1284 Table meta = getMetaHTable(connection);
1285 try {
1286 HRegionInfo copyOfParent = new HRegionInfo(parent);
1287 copyOfParent.setOffline(true);
1288 copyOfParent.setSplit(true);
1289
1290
1291 Put putParent = makePutFromRegionInfo(copyOfParent);
1292 addDaughtersToPut(putParent, splitA, splitB);
1293
1294
1295 Put putA = makePutFromRegionInfo(splitA);
1296 Put putB = makePutFromRegionInfo(splitB);
1297
1298 addLocation(putA, sn, 1, -1, splitA.getReplicaId());
1299 addLocation(putB, sn, 1, -1, splitB.getReplicaId());
1300
1301
1302
1303 for (int i = 1; i < regionReplication; i++) {
1304 addEmptyLocation(putA, i);
1305 addEmptyLocation(putB, i);
1306 }
1307
1308 byte[] tableRow = Bytes.toBytes(parent.getRegionNameAsString() + HConstants.DELIMITER);
1309 multiMutate(meta, tableRow, putParent, putA, putB);
1310 } finally {
1311 meta.close();
1312 }
1313 }
1314
1315
1316
1317
1318 private static void multiMutate(Table table, byte[] row, Mutation... mutations)
1319 throws IOException {
1320 CoprocessorRpcChannel channel = table.coprocessorService(row);
1321 MultiRowMutationProtos.MutateRowsRequest.Builder mmrBuilder
1322 = MultiRowMutationProtos.MutateRowsRequest.newBuilder();
1323 for (Mutation mutation : mutations) {
1324 if (mutation instanceof Put) {
1325 mmrBuilder.addMutationRequest(ProtobufUtil.toMutation(
1326 ClientProtos.MutationProto.MutationType.PUT, mutation));
1327 } else if (mutation instanceof Delete) {
1328 mmrBuilder.addMutationRequest(ProtobufUtil.toMutation(
1329 ClientProtos.MutationProto.MutationType.DELETE, mutation));
1330 } else {
1331 throw new DoNotRetryIOException("multi in MetaEditor doesn't support "
1332 + mutation.getClass().getName());
1333 }
1334 }
1335
1336 MultiRowMutationProtos.MultiRowMutationService.BlockingInterface service =
1337 MultiRowMutationProtos.MultiRowMutationService.newBlockingStub(channel);
1338 try {
1339 service.mutateRows(null, mmrBuilder.build());
1340 } catch (ServiceException ex) {
1341 ProtobufUtil.toIOException(ex);
1342 }
1343 }
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359 public static void updateRegionLocation(Connection connection,
1360 HRegionInfo regionInfo, ServerName sn, long openSeqNum,
1361 long masterSystemTime)
1362 throws IOException {
1363 updateLocation(connection, regionInfo, sn, openSeqNum, masterSystemTime);
1364 }
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380 private static void updateLocation(final Connection connection,
1381 HRegionInfo regionInfo, ServerName sn, long openSeqNum,
1382 long masterSystemTime)
1383 throws IOException {
1384
1385
1386 long time = Math.max(EnvironmentEdgeManager.currentTime(), masterSystemTime);
1387
1388
1389 Put put = new Put(getMetaKeyForRegion(regionInfo), time);
1390 addLocation(put, sn, openSeqNum, time, regionInfo.getReplicaId());
1391 putToMetaTable(connection, put);
1392 LOG.info("Updated row " + regionInfo.getRegionNameAsString() +
1393 " with server=" + sn);
1394 }
1395
1396
1397
1398
1399
1400
1401
1402 public static void deleteRegion(Connection connection,
1403 HRegionInfo regionInfo)
1404 throws IOException {
1405 Delete delete = new Delete(regionInfo.getRegionName());
1406 deleteFromMetaTable(connection, delete);
1407 LOG.info("Deleted " + regionInfo.getRegionNameAsString());
1408 }
1409
1410
1411
1412
1413
1414
1415
1416
1417 public static void deleteRegions(Connection connection,
1418 List<HRegionInfo> regionsInfo, long ts) throws IOException {
1419 List<Delete> deletes = new ArrayList<Delete>(regionsInfo.size());
1420 for (HRegionInfo hri: regionsInfo) {
1421 deletes.add(new Delete(hri.getRegionName(), ts));
1422 }
1423 deleteFromMetaTable(connection, deletes);
1424 LOG.info("Deleted " + regionsInfo);
1425 }
1426
1427
1428
1429
1430
1431
1432 public static void deleteRegions(Connection connection,
1433 List<HRegionInfo> regionsInfo) throws IOException {
1434 deleteRegions(connection, regionsInfo, HConstants.LATEST_TIMESTAMP);
1435 }
1436
1437
1438
1439
1440
1441
1442
1443
1444 public static void mutateRegions(Connection connection,
1445 final List<HRegionInfo> regionsToRemove,
1446 final List<HRegionInfo> regionsToAdd)
1447 throws IOException {
1448 List<Mutation> mutation = new ArrayList<Mutation>();
1449 if (regionsToRemove != null) {
1450 for (HRegionInfo hri: regionsToRemove) {
1451 mutation.add(new Delete(hri.getRegionName()));
1452 }
1453 }
1454 if (regionsToAdd != null) {
1455 for (HRegionInfo hri: regionsToAdd) {
1456 mutation.add(makePutFromRegionInfo(hri));
1457 }
1458 }
1459 mutateMetaTable(connection, mutation);
1460 if (regionsToRemove != null && regionsToRemove.size() > 0) {
1461 LOG.debug("Deleted " + regionsToRemove);
1462 }
1463 if (regionsToAdd != null && regionsToAdd.size() > 0) {
1464 LOG.debug("Added " + regionsToAdd);
1465 }
1466 }
1467
1468
1469
1470
1471
1472
1473
1474 public static void overwriteRegions(Connection connection,
1475 List<HRegionInfo> regionInfos, int regionReplication) throws IOException {
1476
1477 long now = EnvironmentEdgeManager.currentTime();
1478 deleteRegions(connection, regionInfos, now);
1479
1480
1481
1482
1483
1484
1485 addRegionsToMeta(connection, regionInfos, regionReplication, now+1);
1486 LOG.info("Overwritten " + regionInfos);
1487 }
1488
1489
1490
1491
1492
1493
1494
1495 public static void deleteMergeQualifiers(Connection connection,
1496 final HRegionInfo mergedRegion) throws IOException {
1497 Delete delete = new Delete(mergedRegion.getRegionName());
1498 delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.MERGEA_QUALIFIER);
1499 delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.MERGEB_QUALIFIER);
1500 deleteFromMetaTable(connection, delete);
1501 LOG.info("Deleted references in merged region "
1502 + mergedRegion.getRegionNameAsString() + ", qualifier="
1503 + Bytes.toStringBinary(HConstants.MERGEA_QUALIFIER) + " and qualifier="
1504 + Bytes.toStringBinary(HConstants.MERGEB_QUALIFIER));
1505 }
1506
1507 private static Put addRegionInfo(final Put p, final HRegionInfo hri)
1508 throws IOException {
1509 p.addImmutable(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER,
1510 hri.toByteArray());
1511 return p;
1512 }
1513
1514 public static Put addLocation(final Put p, final ServerName sn, long openSeqNum,
1515 long time, int replicaId){
1516 if (time <= 0) {
1517 time = EnvironmentEdgeManager.currentTime();
1518 }
1519 p.addImmutable(HConstants.CATALOG_FAMILY, getServerColumn(replicaId), time,
1520 Bytes.toBytes(sn.getHostAndPort()));
1521 p.addImmutable(HConstants.CATALOG_FAMILY, getStartCodeColumn(replicaId), time,
1522 Bytes.toBytes(sn.getStartcode()));
1523 p.addImmutable(HConstants.CATALOG_FAMILY, getSeqNumColumn(replicaId), time,
1524 Bytes.toBytes(openSeqNum));
1525 return p;
1526 }
1527
1528 public static Put addEmptyLocation(final Put p, int replicaId) {
1529 long now = EnvironmentEdgeManager.currentTime();
1530 p.addImmutable(HConstants.CATALOG_FAMILY, getServerColumn(replicaId), now, null);
1531 p.addImmutable(HConstants.CATALOG_FAMILY, getStartCodeColumn(replicaId), now, null);
1532 p.addImmutable(HConstants.CATALOG_FAMILY, getSeqNumColumn(replicaId), now, null);
1533 return p;
1534 }
1535 }