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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.backup; |
| 19 | + |
| 20 | +import java.io.IOException; |
| 21 | +import java.util.Arrays; |
| 22 | +import java.util.List; |
| 23 | +import java.util.Optional; |
| 24 | +import java.util.Set; |
| 25 | +import java.util.function.Predicate; |
| 26 | +import java.util.stream.Collectors; |
| 27 | +import org.apache.hadoop.conf.Configuration; |
| 28 | +import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| 29 | +import org.apache.hadoop.hbase.TableName; |
| 30 | +import org.apache.hadoop.hbase.backup.impl.BackupManager; |
| 31 | +import org.apache.hadoop.hbase.backup.impl.BackupSystemTable; |
| 32 | +import org.apache.hadoop.hbase.backup.impl.BulkLoad; |
| 33 | +import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor; |
| 34 | +import org.apache.hadoop.hbase.client.Connection; |
| 35 | +import org.apache.hadoop.hbase.client.ConnectionFactory; |
| 36 | +import org.apache.hadoop.hbase.client.TableDescriptor; |
| 37 | +import org.apache.hadoop.hbase.coprocessor.MasterCoprocessor; |
| 38 | +import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment; |
| 39 | +import org.apache.hadoop.hbase.coprocessor.MasterObserver; |
| 40 | +import org.apache.hadoop.hbase.coprocessor.ObserverContext; |
| 41 | +import org.apache.yetus.audience.InterfaceAudience; |
| 42 | +import org.slf4j.Logger; |
| 43 | +import org.slf4j.LoggerFactory; |
| 44 | + |
| 45 | +import org.apache.hbase.thirdparty.com.google.common.collect.Sets; |
| 46 | + |
| 47 | +/** |
| 48 | + * An Observer to facilitate backup operations |
| 49 | + */ |
| 50 | +@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) |
| 51 | +public class BackupMasterObserver implements MasterCoprocessor, MasterObserver { |
| 52 | + private static final Logger LOG = LoggerFactory.getLogger(BackupMasterObserver.class); |
| 53 | + |
| 54 | + @Override |
| 55 | + public Optional<MasterObserver> getMasterObserver() { |
| 56 | + return Optional.of(this); |
| 57 | + } |
| 58 | + |
| 59 | + @Override |
| 60 | + public void postDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx, |
| 61 | + TableName tableName) throws IOException { |
| 62 | + Configuration cfg = ctx.getEnvironment().getConfiguration(); |
| 63 | + if (!BackupManager.isBackupEnabled(cfg)) { |
| 64 | + LOG.debug("Skipping postDeleteTable hook since backup is disabled"); |
| 65 | + return; |
| 66 | + } |
| 67 | + deleteBulkLoads(cfg, tableName, (ignored) -> true); |
| 68 | + } |
| 69 | + |
| 70 | + @Override |
| 71 | + public void postTruncateTable(ObserverContext<MasterCoprocessorEnvironment> ctx, |
| 72 | + TableName tableName) throws IOException { |
| 73 | + Configuration cfg = ctx.getEnvironment().getConfiguration(); |
| 74 | + if (!BackupManager.isBackupEnabled(cfg)) { |
| 75 | + LOG.debug("Skipping postTruncateTable hook since backup is disabled"); |
| 76 | + return; |
| 77 | + } |
| 78 | + deleteBulkLoads(cfg, tableName, (ignored) -> true); |
| 79 | + } |
| 80 | + |
| 81 | + @Override |
| 82 | + public void postModifyTable(final ObserverContext<MasterCoprocessorEnvironment> ctx, |
| 83 | + final TableName tableName, TableDescriptor oldDescriptor, TableDescriptor currentDescriptor) |
| 84 | + throws IOException { |
| 85 | + Configuration cfg = ctx.getEnvironment().getConfiguration(); |
| 86 | + if (!BackupManager.isBackupEnabled(cfg)) { |
| 87 | + LOG.debug("Skipping postModifyTable hook since backup is disabled"); |
| 88 | + return; |
| 89 | + } |
| 90 | + |
| 91 | + Set<String> oldFamilies = Arrays.stream(oldDescriptor.getColumnFamilies()) |
| 92 | + .map(ColumnFamilyDescriptor::getNameAsString).collect(Collectors.toSet()); |
| 93 | + Set<String> newFamilies = Arrays.stream(currentDescriptor.getColumnFamilies()) |
| 94 | + .map(ColumnFamilyDescriptor::getNameAsString).collect(Collectors.toSet()); |
| 95 | + |
| 96 | + Set<String> removedFamilies = Sets.difference(oldFamilies, newFamilies); |
| 97 | + if (!removedFamilies.isEmpty()) { |
| 98 | + Predicate<BulkLoad> filter = bulkload -> removedFamilies.contains(bulkload.getColumnFamily()); |
| 99 | + deleteBulkLoads(cfg, tableName, filter); |
| 100 | + } |
| 101 | + } |
| 102 | + |
| 103 | + /** |
| 104 | + * Deletes all bulk load entries for the given table, matching the provided predicate. |
| 105 | + */ |
| 106 | + private void deleteBulkLoads(Configuration config, TableName tableName, |
| 107 | + Predicate<BulkLoad> filter) throws IOException { |
| 108 | + try (Connection connection = ConnectionFactory.createConnection(config); |
| 109 | + BackupSystemTable tbl = new BackupSystemTable(connection)) { |
| 110 | + List<BulkLoad> bulkLoads = tbl.readBulkloadRows(List.of(tableName)); |
| 111 | + List<byte[]> rowsToDelete = |
| 112 | + bulkLoads.stream().filter(filter).map(BulkLoad::getRowKey).toList(); |
| 113 | + tbl.deleteBulkLoadedRows(rowsToDelete); |
| 114 | + } |
| 115 | + } |
| 116 | +} |
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