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;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertTrue;
023
024import java.util.ArrayList;
025import java.util.List;
026import java.util.SortedSet;
027
028import org.apache.hadoop.hbase.HBaseClassTestRule;
029import org.apache.hadoop.hbase.TableName;
030import org.apache.hadoop.hbase.client.RegionInfo;
031import org.apache.hadoop.hbase.client.RegionInfoBuilder;
032import org.apache.hadoop.hbase.testclassification.MasterTests;
033import org.apache.hadoop.hbase.testclassification.SmallTests;
034import org.apache.hadoop.hbase.util.Bytes;
035import org.apache.hadoop.hbase.util.Pair;
036
037import org.junit.ClassRule;
038import org.junit.Test;
039import org.junit.experimental.categories.Category;
040
041
042
043/**
044 * Test small utility methods inside {@link MetaFixer}.
045 * For cluster tests see {@link TestMetaFixer}
046 */
047@Category({MasterTests.class, SmallTests.class})
048public class TestMetaFixerNoCluster {
049  @ClassRule
050  public static final HBaseClassTestRule CLASS_RULE =
051      HBaseClassTestRule.forClass(TestMetaFixerNoCluster.class);
052  private static byte [] A = Bytes.toBytes("a");
053  private static byte [] B = Bytes.toBytes("b");
054  private static byte [] C = Bytes.toBytes("c");
055  private static byte [] D = Bytes.toBytes("d");
056  private static RegionInfo ALL = RegionInfoBuilder.FIRST_META_REGIONINFO;
057  private static RegionInfo _ARI = RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
058      setEndKey(A).build();
059  private static RegionInfo _BRI = RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
060          setEndKey(B).build();
061  private static RegionInfo ABRI = RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
062          setStartKey(A).setEndKey(B).build();
063  private static RegionInfo ACRI =
064      org.apache.hadoop.hbase.client.RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
065          setStartKey(A).setEndKey(C).build();
066  private static RegionInfo CDRI =
067      org.apache.hadoop.hbase.client.RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
068          setStartKey(C).setEndKey(D).build();
069  private static RegionInfo ADRI =
070      org.apache.hadoop.hbase.client.RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
071          setStartKey(A).setEndKey(D).build();
072  private static RegionInfo D_RI =
073      org.apache.hadoop.hbase.client.RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
074          setStartKey(D).build();
075  private static RegionInfo C_RI =
076      org.apache.hadoop.hbase.client.RegionInfoBuilder.newBuilder(TableName.META_TABLE_NAME).
077          setStartKey(C).build();
078
079  @Test
080  public void testGetRegionInfoWithLargestEndKey() {
081    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(_ARI, _BRI).equals(_BRI));
082    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(C_RI, D_RI).equals(C_RI));
083    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(ABRI, CDRI).equals(CDRI));
084    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(null, CDRI).equals(CDRI));
085    assertTrue(MetaFixer.getRegionInfoWithLargestEndKey(null, null) == null);
086  }
087
088  @Test
089  public void testIsOverlap() {
090    assertTrue(MetaFixer.isOverlap(_BRI, new Pair<RegionInfo, RegionInfo>(ABRI, ACRI)));
091    assertFalse(MetaFixer.isOverlap(_ARI, new Pair<RegionInfo, RegionInfo>(C_RI, D_RI)));
092    assertTrue(MetaFixer.isOverlap(ADRI, new Pair<RegionInfo, RegionInfo>(CDRI, C_RI)));
093    assertFalse(MetaFixer.isOverlap(_BRI, new Pair<RegionInfo, RegionInfo>(CDRI, C_RI)));
094  }
095
096  @Test
097  public void testCalculateMergesNoAggregation() {
098    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
099    overlaps.add(new Pair<RegionInfo, RegionInfo>(_ARI, _BRI));
100    overlaps.add(new Pair<RegionInfo, RegionInfo>(C_RI, D_RI));
101    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(10, overlaps);
102    assertEquals(2, merges.size());
103    assertEquals(2, merges.get(0).size());
104    assertEquals(2, merges.get(1).size());
105  }
106
107  @Test
108  public void testCalculateMergesAggregation() {
109    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
110    overlaps.add(new Pair<RegionInfo, RegionInfo>(ALL, D_RI));
111    overlaps.add(new Pair<RegionInfo, RegionInfo>(_ARI, _BRI));
112    overlaps.add(new Pair<RegionInfo, RegionInfo>(C_RI, D_RI));
113    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(10, overlaps);
114    assertEquals(1, merges.size());
115    assertEquals(5, merges.get(0).size());
116  }
117
118  @Test
119  public void testCalculateMergesNoRepeatOfRegionNames() {
120    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
121    overlaps.add(new Pair<RegionInfo, RegionInfo>(_BRI, ABRI));
122    overlaps.add(new Pair<RegionInfo, RegionInfo>(ABRI, ADRI));
123    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(10, overlaps);
124    assertEquals(1, merges.size());
125    // There should be three regions to merge, not four.
126    assertEquals(3, merges.get(0).size());
127  }
128
129  @Test
130  public void testCalculateMergesRespectsMax() {
131    List<Pair<RegionInfo, RegionInfo>> overlaps = new ArrayList<>();
132    overlaps.add(new Pair<RegionInfo, RegionInfo>(_BRI, ABRI));
133    overlaps.add(new Pair<RegionInfo, RegionInfo>(ABRI, ADRI));
134    overlaps.add(new Pair<RegionInfo, RegionInfo>(C_RI, D_RI));
135    List<SortedSet<RegionInfo>> merges = MetaFixer.calculateMerges(3, overlaps);
136    assertEquals(2, merges.size());
137    // There should be three regions to merge, not four.
138    assertEquals(3, merges.get(0).size());
139    assertEquals(2, merges.get(1).size());
140  }
141}