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.assignment;
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.io.IOException;
027import java.util.List;
028import java.util.concurrent.atomic.AtomicBoolean;
029import org.apache.hadoop.hbase.Cell;
030import org.apache.hadoop.hbase.HBaseClassTestRule;
031import org.apache.hadoop.hbase.HBaseTestingUtility;
032import org.apache.hadoop.hbase.HConstants;
033import org.apache.hadoop.hbase.MetaTableAccessor;
034import org.apache.hadoop.hbase.ServerName;
035import org.apache.hadoop.hbase.TableName;
036import org.apache.hadoop.hbase.TableNameTestRule;
037import org.apache.hadoop.hbase.client.Get;
038import org.apache.hadoop.hbase.client.Put;
039import org.apache.hadoop.hbase.client.RegionInfo;
040import org.apache.hadoop.hbase.client.RegionInfoBuilder;
041import org.apache.hadoop.hbase.client.Result;
042import org.apache.hadoop.hbase.client.Table;
043import org.apache.hadoop.hbase.master.RegionState;
044import org.apache.hadoop.hbase.regionserver.HRegion;
045import org.apache.hadoop.hbase.testclassification.MasterTests;
046import org.apache.hadoop.hbase.testclassification.MediumTests;
047import org.apache.hadoop.hbase.util.Bytes;
048import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
049import org.junit.AfterClass;
050import org.junit.BeforeClass;
051import org.junit.ClassRule;
052import org.junit.Rule;
053import org.junit.Test;
054import org.junit.experimental.categories.Category;
055
056import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
057
058
059@Category({ MasterTests.class, MediumTests.class })
060public class TestRegionStateStore {
061
062  @ClassRule
063  public static final HBaseClassTestRule CLASS_RULE =
064    HBaseClassTestRule.forClass(TestRegionStateStore.class);
065
066  private static HBaseTestingUtility UTIL = new HBaseTestingUtility();
067
068  @Rule
069  public final TableNameTestRule name = new TableNameTestRule();
070
071  @BeforeClass
072  public static void beforeClass() throws Exception {
073    UTIL.startMiniCluster();
074  }
075
076  @AfterClass
077  public static void tearDown() throws Exception {
078    UTIL.shutdownMiniCluster();
079  }
080
081  @Test
082  public void testVisitMetaForRegionExistingRegion() throws Exception {
083    final TableName tableName = name.getTableName();
084    UTIL.createTable(tableName, "cf");
085    final List<HRegion> regions = UTIL.getHBaseCluster().getRegions(tableName);
086    final String encodedName = regions.get(0).getRegionInfo().getEncodedName();
087    final RegionStateStore regionStateStore = UTIL.getHBaseCluster().getMaster().
088      getAssignmentManager().getRegionStateStore();
089    final AtomicBoolean visitorCalled = new AtomicBoolean(false);
090    regionStateStore.visitMetaForRegion(encodedName, new RegionStateStore.RegionStateVisitor() {
091      @Override
092      public void visitRegionState(Result result, RegionInfo regionInfo, RegionState.State state,
093        ServerName regionLocation, ServerName lastHost, long openSeqNum) {
094        assertEquals(encodedName, regionInfo.getEncodedName());
095        visitorCalled.set(true);
096      }
097    });
098    assertTrue("Visitor has not been called.", visitorCalled.get());
099  }
100
101  @Test
102  public void testVisitMetaForBadRegionState() throws Exception {
103    final TableName tableName = name.getTableName();
104    UTIL.createTable(tableName, "cf");
105    final List<HRegion> regions = UTIL.getHBaseCluster().getRegions(tableName);
106    final String encodedName = regions.get(0).getRegionInfo().getEncodedName();
107    final RegionStateStore regionStateStore = UTIL.getHBaseCluster().getMaster().
108        getAssignmentManager().getRegionStateStore();
109
110    // add the BAD_STATE which does not exist in enum RegionState.State
111    Put put = new Put(regions.get(0).getRegionInfo().getRegionName(),
112        EnvironmentEdgeManager.currentTime());
113    put.addColumn(HConstants.CATALOG_FAMILY, HConstants.STATE_QUALIFIER,
114        Bytes.toBytes("BAD_STATE"));
115
116    try (Table table = UTIL.getConnection().getTable(TableName.META_TABLE_NAME)) {
117      table.put(put);
118    }
119
120    final AtomicBoolean visitorCalled = new AtomicBoolean(false);
121    regionStateStore.visitMetaForRegion(encodedName, new RegionStateStore.RegionStateVisitor() {
122      @Override
123      public void visitRegionState(Result result, RegionInfo regionInfo,
124                                   RegionState.State state, ServerName regionLocation,
125                                   ServerName lastHost, long openSeqNum) {
126        assertEquals(encodedName, regionInfo.getEncodedName());
127        assertNull(state);
128        visitorCalled.set(true);
129      }
130    });
131    assertTrue("Visitor has not been called.", visitorCalled.get());
132  }
133
134  @Test
135  public void testVisitMetaForRegionNonExistingRegion() throws Exception {
136    final String encodedName = "fakeencodedregionname";
137    final RegionStateStore regionStateStore = UTIL.getHBaseCluster().getMaster().
138      getAssignmentManager().getRegionStateStore();
139    final AtomicBoolean visitorCalled = new AtomicBoolean(false);
140    regionStateStore.visitMetaForRegion(encodedName, new RegionStateStore.RegionStateVisitor() {
141      @Override
142      public void visitRegionState(Result result, RegionInfo regionInfo, RegionState.State state,
143        ServerName regionLocation, ServerName lastHost, long openSeqNum) {
144        visitorCalled.set(true);
145      }
146    });
147    assertFalse("Visitor has been called, but it shouldn't.", visitorCalled.get());
148  }
149
150  @Test
151  public void testMetaLocationForRegionReplicasIsRemovedAtTableDeletion() throws IOException {
152    long regionId = System.currentTimeMillis();
153    TableName tableName = name.getTableName();
154    RegionInfo primary = RegionInfoBuilder.newBuilder(tableName)
155      .setStartKey(HConstants.EMPTY_START_ROW).setEndKey(HConstants.EMPTY_END_ROW).setSplit(false)
156      .setRegionId(regionId).setReplicaId(0).build();
157
158    try (Table meta = MetaTableAccessor.getMetaHTable(UTIL.getConnection())) {
159      List<RegionInfo> regionInfos = Lists.newArrayList(primary);
160      MetaTableAccessor.addRegionsToMeta(UTIL.getConnection(), regionInfos, 3);
161      final RegionStateStore regionStateStore =
162        UTIL.getHBaseCluster().getMaster().getAssignmentManager().getRegionStateStore();
163      regionStateStore.removeRegionReplicas(tableName, 3, 1);
164      Get get = new Get(primary.getRegionName());
165      Result result = meta.get(get);
166      for (int replicaId = 0; replicaId < 3; replicaId++) {
167        Cell serverCell = result.getColumnLatestCell(HConstants.CATALOG_FAMILY,
168          MetaTableAccessor.getServerColumn(replicaId));
169        Cell startCodeCell = result.getColumnLatestCell(HConstants.CATALOG_FAMILY,
170          MetaTableAccessor.getStartCodeColumn(replicaId));
171        Cell stateCell = result.getColumnLatestCell(HConstants.CATALOG_FAMILY,
172          MetaTableAccessor.getRegionStateColumn(replicaId));
173        Cell snCell = result.getColumnLatestCell(HConstants.CATALOG_FAMILY,
174          MetaTableAccessor.getServerNameColumn(replicaId));
175        if (replicaId == 0) {
176          assertNotNull(stateCell);
177        } else {
178          assertNull(serverCell);
179          assertNull(startCodeCell);
180          assertNull(stateCell);
181          assertNull(snCell);
182        }
183      }
184    }
185  }
186}