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.coprocessor;
019
020import static org.junit.Assert.assertTrue;
021
022import java.io.IOException;
023import java.util.Optional;
024import org.apache.hadoop.conf.Configuration;
025import org.apache.hadoop.fs.Path;
026import org.apache.hadoop.hbase.Coprocessor;
027import org.apache.hadoop.hbase.HBaseClassTestRule;
028import org.apache.hadoop.hbase.HBaseTestingUtil;
029import org.apache.hadoop.hbase.TableName;
030import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
031import org.apache.hadoop.hbase.client.Durability;
032import org.apache.hadoop.hbase.client.Put;
033import org.apache.hadoop.hbase.client.RegionInfo;
034import org.apache.hadoop.hbase.client.RegionInfoBuilder;
035import org.apache.hadoop.hbase.client.TableDescriptor;
036import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
037import org.apache.hadoop.hbase.regionserver.ChunkCreator;
038import org.apache.hadoop.hbase.regionserver.HRegion;
039import org.apache.hadoop.hbase.regionserver.MemStoreLAB;
040import org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost;
041import org.apache.hadoop.hbase.regionserver.RegionServerServices;
042import org.apache.hadoop.hbase.testclassification.CoprocessorTests;
043import org.apache.hadoop.hbase.testclassification.SmallTests;
044import org.apache.hadoop.hbase.util.Bytes;
045import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
046import org.apache.hadoop.hbase.util.Threads;
047import org.apache.hadoop.hbase.wal.WALEdit;
048import org.junit.ClassRule;
049import org.junit.Test;
050import org.junit.experimental.categories.Category;
051import org.mockito.Mockito;
052
053@Category({ CoprocessorTests.class, SmallTests.class })
054public class TestRegionObserverStacking {
055
056  @ClassRule
057  public static final HBaseClassTestRule CLASS_RULE =
058    HBaseClassTestRule.forClass(TestRegionObserverStacking.class);
059
060  private static HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
061  static final Path DIR = TEST_UTIL.getDataTestDir();
062
063  public static class ObserverA implements RegionCoprocessor, RegionObserver {
064    long id;
065
066    @Override
067    public Optional<RegionObserver> getRegionObserver() {
068      return Optional.of(this);
069    }
070
071    @Override
072    public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c, final Put put,
073      final WALEdit edit, final Durability durability) throws IOException {
074      id = EnvironmentEdgeManager.currentTime();
075      Threads.sleepWithoutInterrupt(10);
076    }
077  }
078
079  public static class ObserverB implements RegionCoprocessor, RegionObserver {
080    long id;
081
082    @Override
083    public Optional<RegionObserver> getRegionObserver() {
084      return Optional.of(this);
085    }
086
087    @Override
088    public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c, final Put put,
089      final WALEdit edit, final Durability durability) throws IOException {
090      id = EnvironmentEdgeManager.currentTime();
091      Threads.sleepWithoutInterrupt(10);
092    }
093  }
094
095  public static class ObserverC implements RegionCoprocessor, RegionObserver {
096    long id;
097
098    @Override
099    public Optional<RegionObserver> getRegionObserver() {
100      return Optional.of(this);
101    }
102
103    @Override
104    public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c, final Put put,
105      final WALEdit edit, final Durability durability) throws IOException {
106      id = EnvironmentEdgeManager.currentTime();
107      Threads.sleepWithoutInterrupt(10);
108    }
109  }
110
111  HRegion initHRegion(byte[] tableName, String callingMethod, Configuration conf,
112    byte[]... families) throws IOException {
113    TableDescriptorBuilder builder =
114      TableDescriptorBuilder.newBuilder(TableName.valueOf(tableName));
115    for (byte[] family : families) {
116      builder.setColumnFamily(ColumnFamilyDescriptorBuilder.of(family));
117    }
118    TableDescriptor tableDescriptor = builder.build();
119    ChunkCreator.initialize(MemStoreLAB.CHUNK_SIZE_DEFAULT, false, 0, 0, 0, null,
120      MemStoreLAB.INDEX_CHUNK_SIZE_PERCENTAGE_DEFAULT);
121    RegionInfo info = RegionInfoBuilder.newBuilder(tableDescriptor.getTableName()).build();
122    Path path = new Path(DIR + callingMethod);
123    HRegion r = HBaseTestingUtil.createRegionAndWAL(info, path, conf, tableDescriptor);
124    // this following piece is a hack. currently a coprocessorHost
125    // is secretly loaded at OpenRegionHandler. we don't really
126    // start a region server here, so just manually create cphost
127    // and set it to region.
128    RegionCoprocessorHost host =
129      new RegionCoprocessorHost(r, Mockito.mock(RegionServerServices.class), conf);
130    r.setCoprocessorHost(host);
131    return r;
132  }
133
134  @Test
135  public void testRegionObserverStacking() throws Exception {
136    byte[] ROW = Bytes.toBytes("testRow");
137    byte[] TABLE = Bytes.toBytes(this.getClass().getSimpleName());
138    byte[] A = Bytes.toBytes("A");
139    byte[][] FAMILIES = new byte[][] { A };
140
141    Configuration conf = TEST_UTIL.getConfiguration();
142    HRegion region = initHRegion(TABLE, getClass().getName(), conf, FAMILIES);
143    RegionCoprocessorHost h = region.getCoprocessorHost();
144    h.load(ObserverA.class, Coprocessor.PRIORITY_HIGHEST, conf);
145    h.load(ObserverB.class, Coprocessor.PRIORITY_USER, conf);
146    h.load(ObserverC.class, Coprocessor.PRIORITY_LOWEST, conf);
147
148    Put put = new Put(ROW);
149    put.addColumn(A, A, A);
150    region.put(put);
151
152    Coprocessor c = h.findCoprocessor(ObserverA.class.getName());
153    long idA = ((ObserverA) c).id;
154    c = h.findCoprocessor(ObserverB.class.getName());
155    long idB = ((ObserverB) c).id;
156    c = h.findCoprocessor(ObserverC.class.getName());
157    long idC = ((ObserverC) c).id;
158
159    assertTrue(idA < idB);
160    assertTrue(idB < idC);
161    HBaseTestingUtil.closeRegionAndWAL(region);
162  }
163}