001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.master.janitor;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021import static org.junit.jupiter.api.Assertions.assertFalse;
022import static org.junit.jupiter.api.Assertions.assertTrue;
023
024import java.util.ArrayList;
025import java.util.List;
026import java.util.SortedSet;
027import org.apache.hadoop.hbase.TableName;
028import org.apache.hadoop.hbase.client.RegionInfo;
029import org.apache.hadoop.hbase.client.RegionInfoBuilder;
030import org.apache.hadoop.hbase.testclassification.MasterTests;
031import org.apache.hadoop.hbase.testclassification.SmallTests;
032import org.apache.hadoop.hbase.util.Bytes;
033import org.apache.hadoop.hbase.util.Pair;
034import org.junit.jupiter.api.Tag;
035import org.junit.jupiter.api.Test;
036
037/**
038 * Test small utility methods inside {@link MetaFixer}. For cluster tests see {@link TestMetaFixer}
039 */
040@Tag(MasterTests.TAG)
041@Tag(SmallTests.TAG)
042public class TestMetaFixerNoCluster {
043  private static byte[] A = Bytes.toBytes("a");
044  private static byte[] B = Bytes.toBytes("b");
045  private static byte[] C = Bytes.toBytes("c");
046  private static byte[] D = Bytes.toBytes("d");
047  private static RegionInfo ALL = RegionInfoBuilder.FIRST_META_REGIONINFO;
048  private static RegionInfo _ARI =
049    RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).setEndKey(A).build();
050  private static RegionInfo _BRI =
051    RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).setEndKey(B).build();
052  private static RegionInfo ABRI =
053    RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).setStartKey(A).setEndKey(B).build();
054  private static RegionInfo ACRI = org.apache.hadoop.hbase.client.RegionInfoBuilder
055    .newBuilder(TableName.META_TABLE_NAME).setStartKey(A).setEndKey(C).build();
056  private static RegionInfo CDRI = org.apache.hadoop.hbase.client.RegionInfoBuilder
057    .newBuilder(TableName.META_TABLE_NAME).setStartKey(C).setEndKey(D).build();
058  private static RegionInfo ADRI = org.apache.hadoop.hbase.client.RegionInfoBuilder
059    .newBuilder(TableName.META_TABLE_NAME).setStartKey(A).setEndKey(D).build();
060  private static RegionInfo D_RI = org.apache.hadoop.hbase.client.RegionInfoBuilder
061    .newBuilder(TableName.META_TABLE_NAME).setStartKey(D).build();
062  private static RegionInfo C_RI = org.apache.hadoop.hbase.client.RegionInfoBuilder
063    .newBuilder(TableName.META_TABLE_NAME).setStartKey(C).build();
064
065  @Test
066  public void testGetRegionInfoWithLargestEndKey() {
067    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(_ARI, _BRI).equals(_BRI));
068    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(C_RI, D_RI).equals(C_RI));
069    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(ABRI, CDRI).equals(CDRI));
070    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(null, CDRI).equals(CDRI));
071    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(null, null) == null);
072  }
073
074  @Test
075  public void testIsOverlap() {
076    assertTrue(MetaFixer.isOverlap(_BRI, new Pair<RegionInfo, RegionInfo>(ABRI, ACRI)));
077    assertFalse(MetaFixer.isOverlap(_ARI, new Pair<RegionInfo, RegionInfo>(C_RI, D_RI)));
078    assertTrue(MetaFixer.isOverlap(ADRI, new Pair<RegionInfo, RegionInfo>(CDRI, C_RI)));
079    assertFalse(MetaFixer.isOverlap(_BRI, new Pair<RegionInfo, RegionInfo>(CDRI, C_RI)));
080  }
081
082  @Test
083  public void testCalculateMergesNoAggregation() {
084    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
085    overlaps.add(new Pair<RegionInfo, RegionInfo>(_ARI, _BRI));
086    overlaps.add(new Pair<RegionInfo, RegionInfo>(C_RI, D_RI));
087    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(10, overlaps);
088    assertEquals(2, merges.size());
089    assertEquals(2, merges.get(0).size());
090    assertEquals(2, merges.get(1).size());
091  }
092
093  @Test
094  public void testCalculateMergesAggregation() {
095    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
096    overlaps.add(new Pair<RegionInfo, RegionInfo>(ALL, D_RI));
097    overlaps.add(new Pair<RegionInfo, RegionInfo>(_ARI, _BRI));
098    overlaps.add(new Pair<RegionInfo, RegionInfo>(C_RI, D_RI));
099    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(10, overlaps);
100    assertEquals(1, merges.size());
101    assertEquals(5, merges.get(0).size());
102  }
103
104  @Test
105  public void testCalculateMergesNoRepeatOfRegionNames() {
106    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
107    overlaps.add(new Pair<RegionInfo, RegionInfo>(_BRI, ABRI));
108    overlaps.add(new Pair<RegionInfo, RegionInfo>(ABRI, ADRI));
109    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(10, overlaps);
110    assertEquals(1, merges.size());
111    // There should be three regions to merge, not four.
112    assertEquals(3, merges.get(0).size());
113  }
114
115  @Test
116  public void testCalculateMergesRespectsMax() {
117    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
118    overlaps.add(new Pair<RegionInfo, RegionInfo>(_BRI, ABRI));
119    overlaps.add(new Pair<RegionInfo, RegionInfo>(ABRI, ADRI));
120    overlaps.add(new Pair<RegionInfo, RegionInfo>(C_RI, D_RI));
121    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(3, overlaps);
122    assertEquals(2, merges.size());
123    // There should be three regions to merge, not four.
124    assertEquals(3, merges.get(0).size());
125    assertEquals(2, merges.get(1).size());
126  }
127}