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.assertArrayEquals;
021import static org.junit.Assert.assertEquals;
022import static org.junit.Assert.assertTrue;
023
024import java.io.IOException;
025import java.util.Optional;
026import java.util.concurrent.ExecutionException;
027import java.util.concurrent.TimeUnit;
028import java.util.concurrent.atomic.AtomicInteger;
029import org.apache.commons.io.IOUtils;
030import org.apache.hadoop.hbase.HBaseClassTestRule;
031import org.apache.hadoop.hbase.HBaseTestingUtility;
032import org.apache.hadoop.hbase.TableName;
033import org.apache.hadoop.hbase.coprocessor.ObserverContext;
034import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;
035import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
036import org.apache.hadoop.hbase.coprocessor.RegionObserver;
037import org.apache.hadoop.hbase.testclassification.ClientTests;
038import org.apache.hadoop.hbase.testclassification.MediumTests;
039import org.apache.hadoop.hbase.util.Bytes;
040import org.apache.hadoop.hbase.util.Threads;
041import org.junit.AfterClass;
042import org.junit.Before;
043import org.junit.BeforeClass;
044import org.junit.ClassRule;
045import org.junit.Rule;
046import org.junit.Test;
047import org.junit.experimental.categories.Category;
048import org.junit.rules.TestName;
049
050@Category({ MediumTests.class, ClientTests.class })
051public class TestAsyncTableNoncedRetry {
052
053  @ClassRule
054  public static final HBaseClassTestRule CLASS_RULE =
055    HBaseClassTestRule.forClass(TestAsyncTableNoncedRetry.class);
056
057  private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
058
059  private static TableName TABLE_NAME = TableName.valueOf("async");
060
061  private static byte[] FAMILY = Bytes.toBytes("cf");
062
063  private static byte[] QUALIFIER = Bytes.toBytes("cq");
064
065  private static byte[] VALUE = Bytes.toBytes("value");
066
067  private static AsyncConnection ASYNC_CONN;
068
069  @Rule
070  public TestName testName = new TestName();
071
072  private byte[] row;
073
074  private static AtomicInteger CALLED = new AtomicInteger();
075
076  private static long SLEEP_TIME = 2000;
077
078  public static final class SleepOnceCP implements RegionObserver, RegionCoprocessor {
079
080    @Override
081    public Optional<RegionObserver> getRegionObserver() {
082      return Optional.of(this);
083    }
084
085    @Override
086    public Result postAppend(ObserverContext<RegionCoprocessorEnvironment> c, Append append,
087        Result result) throws IOException {
088      if (CALLED.getAndIncrement() == 0) {
089        Threads.sleepWithoutInterrupt(SLEEP_TIME);
090      }
091      return RegionObserver.super.postAppend(c, append, result);
092    }
093
094    @Override
095    public Result postIncrement(ObserverContext<RegionCoprocessorEnvironment> c,
096        Increment increment, Result result) throws IOException {
097      if (CALLED.getAndIncrement() == 0) {
098        Threads.sleepWithoutInterrupt(SLEEP_TIME);
099      }
100      return RegionObserver.super.postIncrement(c, increment, result);
101    }
102  }
103
104  @BeforeClass
105  public static void setUpBeforeClass() throws Exception {
106    TEST_UTIL.startMiniCluster(1);
107    TEST_UTIL.getAdmin()
108      .createTable(TableDescriptorBuilder.newBuilder(TABLE_NAME)
109        .setColumnFamily(ColumnFamilyDescriptorBuilder.of(FAMILY))
110        .setCoprocessor(SleepOnceCP.class.getName()).build());
111    TEST_UTIL.waitTableAvailable(TABLE_NAME);
112    ASYNC_CONN = ConnectionFactory.createAsyncConnection(TEST_UTIL.getConfiguration()).get();
113  }
114
115  @AfterClass
116  public static void tearDownAfterClass() throws Exception {
117    IOUtils.closeQuietly(ASYNC_CONN);
118    TEST_UTIL.shutdownMiniCluster();
119  }
120
121  @Before
122  public void setUp() throws IOException, InterruptedException {
123    row = Bytes.toBytes(testName.getMethodName().replaceAll("[^0-9A-Za-z]", "_"));
124    CALLED.set(0);
125  }
126
127  @Test
128  public void testAppend() throws InterruptedException, ExecutionException {
129    assertEquals(0, CALLED.get());
130    AsyncTable<?> table = ASYNC_CONN.getTableBuilder(TABLE_NAME)
131      .setRpcTimeout(SLEEP_TIME / 2, TimeUnit.MILLISECONDS).build();
132    Result result = table.append(new Append(row).addColumn(FAMILY, QUALIFIER, VALUE)).get();
133    // make sure we called twice and the result is still correct
134    assertEquals(2, CALLED.get());
135    assertArrayEquals(VALUE, result.getValue(FAMILY, QUALIFIER));
136  }
137
138  @Test
139  public void testAppendWhenReturnResultsEqualsFalse() throws InterruptedException,
140    ExecutionException {
141    assertEquals(0, CALLED.get());
142    AsyncTable<?> table = ASYNC_CONN.getTableBuilder(TABLE_NAME)
143      .setRpcTimeout(SLEEP_TIME / 2, TimeUnit.MILLISECONDS).build();
144    Result result = table.append(new Append(row).addColumn(FAMILY, QUALIFIER, VALUE)
145      .setReturnResults(false)).get();
146    // make sure we called twice and the result is still correct
147    assertEquals(2, CALLED.get());
148    assertTrue(result.isEmpty());
149  }
150
151  @Test
152  public void testIncrement() throws InterruptedException, ExecutionException {
153    assertEquals(0, CALLED.get());
154    AsyncTable<?> table = ASYNC_CONN.getTableBuilder(TABLE_NAME)
155      .setRpcTimeout(SLEEP_TIME / 2, TimeUnit.MILLISECONDS).build();
156    assertEquals(1L, table.incrementColumnValue(row, FAMILY, QUALIFIER, 1L).get().longValue());
157    // make sure we called twice and the result is still correct
158    assertEquals(2, CALLED.get());
159  }
160
161  @Test
162  public void testIncrementWhenReturnResultsEqualsFalse() throws InterruptedException,
163    ExecutionException {
164    assertEquals(0, CALLED.get());
165    AsyncTable<?> table = ASYNC_CONN.getTableBuilder(TABLE_NAME)
166      .setRpcTimeout(SLEEP_TIME / 2, TimeUnit.MILLISECONDS).build();
167    Result result = table.increment(new Increment(row).addColumn(FAMILY, QUALIFIER, 1L)
168      .setReturnResults(false)).get();
169    // make sure we called twice and the result is still correct
170    assertEquals(2, CALLED.get());
171    assertTrue(result.isEmpty());
172  }
173}