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.quotas;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021import static org.junit.jupiter.api.Assertions.assertFalse;
022import static org.junit.jupiter.api.Assertions.assertNotNull;
023import static org.junit.jupiter.api.Assertions.assertNull;
024import static org.junit.jupiter.api.Assertions.assertTrue;
025
026import java.util.HashMap;
027import java.util.Map;
028import java.util.Map.Entry;
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.SmallTests;
033import org.apache.hadoop.hbase.util.Bytes;
034import org.junit.jupiter.api.Tag;
035import org.junit.jupiter.api.Test;
036
037@Tag(SmallTests.TAG)
038public class TestRegionSizeStoreImpl {
039
040  private static final RegionInfo INFOA = RegionInfoBuilder.newBuilder(TableName.valueOf("TEST"))
041    .setStartKey(Bytes.toBytes("a")).setEndKey(Bytes.toBytes("b")).build();
042  private static final RegionInfo INFOB = RegionInfoBuilder.newBuilder(TableName.valueOf("TEST"))
043    .setStartKey(Bytes.toBytes("b")).setEndKey(Bytes.toBytes("c")).build();
044
045  @Test
046  public void testSizeUpdates() {
047    RegionSizeStore store = new RegionSizeStoreImpl();
048    assertTrue(store.isEmpty());
049    assertEquals(0, store.size());
050
051    store.put(INFOA, 1024L);
052
053    assertFalse(store.isEmpty());
054    assertEquals(1, store.size());
055    assertEquals(1024L, store.getRegionSize(INFOA).getSize());
056
057    store.put(INFOA, 2048L);
058    assertEquals(1, store.size());
059    assertEquals(2048L, store.getRegionSize(INFOA).getSize());
060
061    store.incrementRegionSize(INFOA, 512L);
062    assertEquals(1, store.size());
063    assertEquals(2048L + 512L, store.getRegionSize(INFOA).getSize());
064
065    store.remove(INFOA);
066    assertTrue(store.isEmpty());
067    assertEquals(0, store.size());
068
069    store.put(INFOA, 64L);
070    store.put(INFOB, 128L);
071
072    assertEquals(2, store.size());
073    Map<RegionInfo, RegionSize> records = new HashMap<>();
074    for (Entry<RegionInfo, RegionSize> entry : store) {
075      records.put(entry.getKey(), entry.getValue());
076    }
077
078    assertEquals(64L, records.remove(INFOA).getSize());
079    assertEquals(128L, records.remove(INFOB).getSize());
080    assertTrue(records.isEmpty());
081  }
082
083  @Test
084  public void testNegativeDeltaForMissingRegion() {
085    RegionSizeStore store = new RegionSizeStoreImpl();
086
087    assertNull(store.getRegionSize(INFOA));
088
089    // We shouldn't allow a negative size to enter the RegionSizeStore. Getting a negative size
090    // like this shouldn't be possible, but we can prevent the bad state from propagating and
091    // getting worse.
092    store.incrementRegionSize(INFOA, -5);
093    assertNotNull(store.getRegionSize(INFOA));
094    assertEquals(0, store.getRegionSize(INFOA).getSize());
095  }
096}