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.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertNotNull;
023import static org.junit.Assert.assertNull;
024import static org.junit.Assert.assertTrue;
025
026import java.util.HashMap;
027import java.util.Map;
028import java.util.Map.Entry;
029import org.apache.hadoop.hbase.HBaseClassTestRule;
030import org.apache.hadoop.hbase.TableName;
031import org.apache.hadoop.hbase.client.RegionInfo;
032import org.apache.hadoop.hbase.client.RegionInfoBuilder;
033import org.apache.hadoop.hbase.testclassification.SmallTests;
034import org.apache.hadoop.hbase.util.Bytes;
035import org.junit.ClassRule;
036import org.junit.Test;
037import org.junit.experimental.categories.Category;
038
039@Category({ SmallTests.class })
040public class TestRegionSizeStoreImpl {
041  @ClassRule
042  public static final HBaseClassTestRule CLASS_RULE =
043    HBaseClassTestRule.forClass(TestRegionSizeStoreImpl.class);
044
045  private static final RegionInfo INFOA = RegionInfoBuilder.newBuilder(TableName.valueOf("TEST"))
046    .setStartKey(Bytes.toBytes("a")).setEndKey(Bytes.toBytes("b")).build();
047  private static final RegionInfo INFOB = RegionInfoBuilder.newBuilder(TableName.valueOf("TEST"))
048    .setStartKey(Bytes.toBytes("b")).setEndKey(Bytes.toBytes("c")).build();
049
050  @Test
051  public void testSizeUpdates() {
052    RegionSizeStore store = new RegionSizeStoreImpl();
053    assertTrue(store.isEmpty());
054    assertEquals(0, store.size());
055
056    store.put(INFOA, 1024L);
057
058    assertFalse(store.isEmpty());
059    assertEquals(1, store.size());
060    assertEquals(1024L, store.getRegionSize(INFOA).getSize());
061
062    store.put(INFOA, 2048L);
063    assertEquals(1, store.size());
064    assertEquals(2048L, store.getRegionSize(INFOA).getSize());
065
066    store.incrementRegionSize(INFOA, 512L);
067    assertEquals(1, store.size());
068    assertEquals(2048L + 512L, store.getRegionSize(INFOA).getSize());
069
070    store.remove(INFOA);
071    assertTrue(store.isEmpty());
072    assertEquals(0, store.size());
073
074    store.put(INFOA, 64L);
075    store.put(INFOB, 128L);
076
077    assertEquals(2, store.size());
078    Map<RegionInfo, RegionSize> records = new HashMap<>();
079    for (Entry<RegionInfo, RegionSize> entry : store) {
080      records.put(entry.getKey(), entry.getValue());
081    }
082
083    assertEquals(64L, records.remove(INFOA).getSize());
084    assertEquals(128L, records.remove(INFOB).getSize());
085    assertTrue(records.isEmpty());
086  }
087
088  @Test
089  public void testNegativeDeltaForMissingRegion() {
090    RegionSizeStore store = new RegionSizeStoreImpl();
091
092    assertNull(store.getRegionSize(INFOA));
093
094    // We shouldn't allow a negative size to enter the RegionSizeStore. Getting a negative size
095    // like this shouldn't be possible, but we can prevent the bad state from propagating and
096    // getting worse.
097    store.incrementRegionSize(INFOA, -5);
098    assertNotNull(store.getRegionSize(INFOA));
099    assertEquals(0, store.getRegionSize(INFOA).getSize());
100  }
101}