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.client;
019
020import static org.junit.Assert.assertEquals;
021
022import java.util.ArrayList;
023import java.util.List;
024import java.util.stream.Collectors;
025import java.util.stream.IntStream;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.HBaseTestingUtil;
028import org.apache.hadoop.hbase.HConstants;
029import org.apache.hadoop.hbase.TableName;
030import org.apache.hadoop.hbase.testclassification.ClientTests;
031import org.apache.hadoop.hbase.testclassification.LargeTests;
032import org.apache.hadoop.hbase.util.Bytes;
033import org.apache.hadoop.hbase.util.Threads;
034import org.junit.AfterClass;
035import org.junit.BeforeClass;
036import org.junit.ClassRule;
037import org.junit.Test;
038import org.junit.experimental.categories.Category;
039
040@Category({ LargeTests.class, ClientTests.class })
041public class TestAsyncTableScanRenewLease {
042
043  @ClassRule
044  public static final HBaseClassTestRule CLASS_RULE =
045      HBaseClassTestRule.forClass(TestAsyncTableScanRenewLease.class);
046
047  private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
048
049  private static TableName TABLE_NAME = TableName.valueOf("async");
050
051  private static byte[] FAMILY = Bytes.toBytes("cf");
052
053  private static byte[] CQ = Bytes.toBytes("cq");
054
055  private static AsyncConnection CONN;
056
057  private static AsyncTable<AdvancedScanResultConsumer> TABLE;
058
059  private static int SCANNER_LEASE_TIMEOUT_PERIOD_MS = 5000;
060
061  @BeforeClass
062  public static void setUp() throws Exception {
063    TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
064      SCANNER_LEASE_TIMEOUT_PERIOD_MS);
065    TEST_UTIL.startMiniCluster(1);
066    TEST_UTIL.createTable(TABLE_NAME, FAMILY);
067    CONN = ConnectionFactory.createAsyncConnection(TEST_UTIL.getConfiguration()).get();
068    TABLE = CONN.getTable(TABLE_NAME);
069    TABLE.putAll(IntStream.range(0, 10).mapToObj(
070      i -> new Put(Bytes.toBytes(String.format("%02d", i))).addColumn(FAMILY, CQ, Bytes.toBytes(i)))
071        .collect(Collectors.toList())).get();
072  }
073
074  @AfterClass
075  public static void tearDown() throws Exception {
076    CONN.close();
077    TEST_UTIL.shutdownMiniCluster();
078  }
079
080  private static final class RenewLeaseConsumer implements AdvancedScanResultConsumer {
081
082    private final List<Result> results = new ArrayList<>();
083
084    private Throwable error;
085
086    private boolean finished = false;
087
088    private boolean suspended = false;
089
090    @Override
091    public synchronized void onNext(Result[] results, ScanController controller) {
092      for (Result result : results) {
093        this.results.add(result);
094      }
095      if (!suspended) {
096        ScanResumer resumer = controller.suspend();
097        new Thread(() -> {
098          Threads.sleep(2 * SCANNER_LEASE_TIMEOUT_PERIOD_MS);
099          try {
100            TABLE.put(new Put(Bytes.toBytes(String.format("%02d", 10))).addColumn(FAMILY, CQ,
101              Bytes.toBytes(10))).get();
102          } catch (Exception e) {
103            onError(e);
104          }
105          resumer.resume();
106        }).start();
107      }
108    }
109
110    @Override
111    public synchronized void onError(Throwable error) {
112      this.finished = true;
113      this.error = error;
114      notifyAll();
115    }
116
117    @Override
118    public synchronized void onComplete() {
119      this.finished = true;
120      notifyAll();
121    }
122
123    public synchronized List<Result> get() throws Throwable {
124      while (!finished) {
125        wait();
126      }
127      if (error != null) {
128        throw error;
129      }
130      return results;
131    }
132  }
133
134  @Test
135  public void test() throws Throwable {
136    RenewLeaseConsumer consumer = new RenewLeaseConsumer();
137    TABLE.scan(new Scan(), consumer);
138    List<Result> results = consumer.get();
139    // should not see the newly added value
140    assertEquals(10, results.size());
141    IntStream.range(0, 10).forEach(i -> {
142      Result result = results.get(i);
143      assertEquals(String.format("%02d", i), Bytes.toString(result.getRow()));
144      assertEquals(i, Bytes.toInt(result.getValue(FAMILY, CQ)));
145    });
146    // now we can see the newly added value
147    List<Result> results2 = TABLE.scanAll(new Scan()).get();
148    assertEquals(11, results2.size());
149    IntStream.range(0, 11).forEach(i -> {
150      Result result = results2.get(i);
151      assertEquals(String.format("%02d", i), Bytes.toString(result.getRow()));
152      assertEquals(i, Bytes.toInt(result.getValue(FAMILY, CQ)));
153    });
154  }
155}