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.replication;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertTrue;
022
023import java.io.IOException;
024import java.io.UncheckedIOException;
025import java.util.UUID;
026import org.apache.hadoop.fs.FileSystem;
027import org.apache.hadoop.fs.Path;
028import org.apache.hadoop.hbase.HBaseTestingUtility;
029import org.apache.hadoop.hbase.HConstants;
030import org.apache.hadoop.hbase.TableName;
031import org.apache.hadoop.hbase.Waiter.ExplainingPredicate;
032import org.apache.hadoop.hbase.client.Admin;
033import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
034import org.apache.hadoop.hbase.client.RegionInfo;
035import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
036import org.apache.hadoop.hbase.regionserver.HRegionServer;
037import org.apache.hadoop.hbase.util.Bytes;
038import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;
039import org.apache.hadoop.hbase.wal.NoEOFWALStreamReader;
040import org.apache.hadoop.hbase.wal.WAL.Entry;
041import org.apache.hadoop.hbase.wal.WALFactory;
042import org.apache.hadoop.hbase.wal.WALProvider;
043import org.apache.hadoop.hbase.wal.WALStreamReader;
044import org.junit.After;
045import org.junit.AfterClass;
046import org.junit.BeforeClass;
047import org.junit.Rule;
048import org.junit.rules.TestName;
049
050/**
051 * Base class for testing serial replication.
052 */
053public class SerialReplicationTestBase {
054
055  protected static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
056
057  protected static String PEER_ID = "1";
058
059  protected static byte[] CF = Bytes.toBytes("CF");
060
061  protected static byte[] CQ = Bytes.toBytes("CQ");
062
063  protected static FileSystem FS;
064
065  protected static Path LOG_DIR;
066
067  protected static WALProvider.Writer WRITER;
068
069  @Rule
070  public final TestName name = new TestName();
071
072  protected Path logPath;
073
074  public static final class LocalReplicationEndpoint extends BaseReplicationEndpoint {
075
076    private static final UUID PEER_UUID = UTIL.getRandomUUID();
077
078    @Override
079    public UUID getPeerUUID() {
080      return PEER_UUID;
081    }
082
083    @Override
084    public boolean replicate(ReplicateContext replicateContext) {
085      synchronized (WRITER) {
086        try {
087          for (Entry entry : replicateContext.getEntries()) {
088            WRITER.append(entry);
089          }
090          WRITER.sync(false);
091        } catch (IOException e) {
092          throw new UncheckedIOException(e);
093        }
094      }
095      return true;
096    }
097
098    @Override
099    public void start() {
100      startAsync();
101    }
102
103    @Override
104    public void stop() {
105      stopAsync();
106    }
107
108    @Override
109    protected void doStart() {
110      notifyStarted();
111    }
112
113    @Override
114    protected void doStop() {
115      notifyStopped();
116    }
117
118    @Override
119    public boolean canReplicateToSameCluster() {
120      return true;
121    }
122  }
123
124  @BeforeClass
125  public static void setUpBeforeClass() throws Exception {
126    UTIL.getConfiguration().setInt("replication.source.nb.capacity", 10);
127    UTIL.getConfiguration().setLong("replication.sleep.before.failover", 1000);
128    UTIL.getConfiguration().setLong("hbase.serial.replication.waiting.ms", 100);
129    UTIL.startMiniCluster(3);
130    // disable balancer
131    UTIL.getAdmin().balancerSwitch(false, true);
132    LOG_DIR = UTIL.getDataTestDirOnTestFS("replicated");
133    FS = UTIL.getTestFileSystem();
134    FS.mkdirs(LOG_DIR);
135  }
136
137  @AfterClass
138  public static void tearDownAfterClass() throws Exception {
139    UTIL.shutdownMiniCluster();
140  }
141
142  @After
143  public void tearDown() throws Exception {
144    Admin admin = UTIL.getAdmin();
145    for (ReplicationPeerDescription pd : admin.listReplicationPeers()) {
146      admin.removeReplicationPeer(pd.getPeerId());
147    }
148    rollAllWALs();
149    if (WRITER != null) {
150      WRITER.close();
151      WRITER = null;
152    }
153  }
154
155  protected static void moveRegion(RegionInfo region, HRegionServer rs) throws Exception {
156    UTIL.getAdmin().move(region.getEncodedNameAsBytes(), rs.getServerName());
157    UTIL.waitFor(30000, new ExplainingPredicate<Exception>() {
158
159      @Override
160      public boolean evaluate() throws Exception {
161        return rs.getRegion(region.getEncodedName()) != null;
162      }
163
164      @Override
165      public String explainFailure() throws Exception {
166        return region + " is still not on " + rs;
167      }
168    });
169  }
170
171  protected static void rollAllWALs() throws Exception {
172    for (RegionServerThread t : UTIL.getMiniHBaseCluster().getLiveRegionServerThreads()) {
173      t.getRegionServer().getWalRoller().requestRollAll();
174    }
175    UTIL.waitFor(30000, new ExplainingPredicate<Exception>() {
176
177      @Override
178      public boolean evaluate() throws Exception {
179        return UTIL.getMiniHBaseCluster().getLiveRegionServerThreads().stream()
180          .map(RegionServerThread::getRegionServer).allMatch(HRegionServer::walRollRequestFinished);
181      }
182
183      @Override
184      public String explainFailure() throws Exception {
185        return "Log roll has not finished yet";
186      }
187    });
188  }
189
190  protected final void setupWALWriter() throws IOException {
191    logPath = new Path(LOG_DIR, name.getMethodName());
192    WRITER = WALFactory.createWALWriter(FS, logPath, UTIL.getConfiguration());
193  }
194
195  protected final void waitUntilReplicationDone(int expectedEntries) throws Exception {
196    UTIL.waitFor(30000, new ExplainingPredicate<Exception>() {
197
198      @Override
199      public boolean evaluate() throws Exception {
200        try {
201          return NoEOFWALStreamReader.count(FS, logPath, UTIL.getConfiguration())
202              >= expectedEntries;
203        } catch (IOException e) {
204          return false;
205        }
206      }
207
208      @Override
209      public String explainFailure() throws Exception {
210        return "Not enough entries replicated";
211      }
212    });
213  }
214
215  protected final void enablePeerAndWaitUntilReplicationDone(int expectedEntries) throws Exception {
216    UTIL.getAdmin().enableReplicationPeer(PEER_ID);
217    waitUntilReplicationDone(expectedEntries);
218  }
219
220  protected final void addPeer(boolean enabled) throws IOException {
221    UTIL.getAdmin().addReplicationPeer(PEER_ID,
222      ReplicationPeerConfig.newBuilder().setClusterKey("127.0.0.1:2181:/hbase")
223        .setReplicationEndpointImpl(LocalReplicationEndpoint.class.getName()).setSerial(true)
224        .build(),
225      enabled);
226  }
227
228  protected final void checkOrder(int expectedEntries) throws IOException {
229    try (WALStreamReader reader =
230      NoEOFWALStreamReader.create(UTIL.getTestFileSystem(), logPath, UTIL.getConfiguration())) {
231      long seqId = -1L;
232      int count = 0;
233      for (Entry entry;;) {
234        entry = reader.next();
235        if (entry == null) {
236          break;
237        }
238        assertTrue(
239          "Sequence id go backwards from " + seqId + " to " + entry.getKey().getSequenceId(),
240          entry.getKey().getSequenceId() >= seqId);
241        seqId = entry.getKey().getSequenceId();
242        count++;
243      }
244      assertEquals(expectedEntries, count);
245    }
246  }
247
248  protected final TableName createTable() throws IOException, InterruptedException {
249    TableName tableName = TableName.valueOf(name.getMethodName());
250    UTIL.getAdmin().createTable(
251      TableDescriptorBuilder.newBuilder(tableName).setColumnFamily(ColumnFamilyDescriptorBuilder
252        .newBuilder(CF).setScope(HConstants.REPLICATION_SCOPE_GLOBAL).build()).build());
253    UTIL.waitTableAvailable(tableName);
254    return tableName;
255  }
256}