hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMvccConsistentScanner.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.client;
  19
  20 import static org.junit.Assert.assertArrayEquals;
  21 import static org.junit.Assert.assertEquals;
  22 import static org.junit.Assert.assertNull;
  23
  24 import java.io.IOException;
  25 import org.apache.hadoop.hbase.HBaseClassTestRule;
  26 import org.apache.hadoop.hbase.HBaseTestingUtility;
  27 import org.apache.hadoop.hbase.TableName;
  28 import org.apache.hadoop.hbase.regionserver.HRegionServer;
  29 import org.apache.hadoop.hbase.testclassification.ClientTests;
  30 import org.apache.hadoop.hbase.testclassification.LargeTests;
  31 import org.apache.hadoop.hbase.util.Bytes;
  32 import org.junit.AfterClass;
  33 import org.junit.Before;
  34 import org.junit.BeforeClass;
  35 import org.junit.ClassRule;
  36 import org.junit.Rule;
  37 import org.junit.Test;
  38 import org.junit.experimental.categories.Category;
  39 import org.junit.rules.TestName;
  40
  41 @Category({ LargeTests.class, ClientTests.class })
  42 public class TestMvccConsistentScanner {
  43
  44   @ClassRule
  45   public static final HBaseClassTestRule CLASS_RULE =
  46       HBaseClassTestRule.forClass(TestMvccConsistentScanner.class);
  47
  48   private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
  49
  50   private static Connection CONN;
  51
  52   private static final byte[] CF = Bytes.toBytes("cf");
  53
  54   private static final byte[] CQ1 = Bytes.toBytes("cq1");
  55
  56   private static final byte[] CQ2 = Bytes.toBytes("cq2");
  57
  58   private static final byte[] CQ3 = Bytes.toBytes("cq3");
  59   @Rule
  60   public TestName testName = new TestName();
  61
  62   private TableName tableName;
  63
  64   @BeforeClass
  65   public static void setUpBeforeClass() throws Exception {
  66     UTIL.startMiniCluster(2);
  67     CONN = ConnectionFactory.createConnection(UTIL.getConfiguration());
  68   }
  69
  70   @AfterClass
  71   public static void tearDownAfterClass() throws Exception {
  72     CONN.close();
  73     UTIL.shutdownMiniCluster();
  74   }
  75
  76   @Before
  77   public void setUp() throws IOException, InterruptedException {
  78     tableName = TableName.valueOf(testName.getMethodName().replaceAll("[^0-9a-zA-Z]", "_"));
  79     UTIL.createTable(tableName, CF);
  80     UTIL.waitTableAvailable(tableName);
  81   }
  82
  83   private void put(byte[] row, byte[] cq, byte[] value) throws IOException {
  84     try (Table table = CONN.getTable(tableName)) {
  85       table.put(new Put(row).addColumn(CF, cq, value));
  86     }
  87   }
  88
  89   private void move() throws IOException, InterruptedException {
  90     RegionInfo region =
  91         UTIL.getHBaseCluster().getRegions(tableName).stream().findAny().get().getRegionInfo();
  92     HRegionServer rs =
  93         UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer())
  94             .filter(r -> !r.getOnlineTables().contains(tableName)).findAny().get();
  95     UTIL.getAdmin().move(region.getEncodedNameAsBytes(),
  96       Bytes.toBytes(rs.getServerName().getServerName()));
  97     while (UTIL.getRSForFirstRegionInTable(tableName) != rs) {
  98       Thread.sleep(100);
  99     }
 100   }
 101
 102   @Test
 103   public void testRowAtomic() throws IOException, InterruptedException {
 104     byte[] row = Bytes.toBytes("row");
 105     put(row, CQ1, Bytes.toBytes(1));
 106     put(row, CQ2, Bytes.toBytes(2));
 107     try (Table table = CONN.getTable(tableName);
 108         ResultScanner scanner = table.getScanner(new Scan().setBatch(1).setCaching(1))) {
 109       Result result = scanner.next();
 110       assertEquals(1, result.rawCells().length);
 111       assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
 112       move();
 113       put(row, CQ3, Bytes.toBytes(3));
 114       result = scanner.next();
 115       assertEquals(1, result.rawCells().length);
 116       assertEquals(2, Bytes.toInt(result.getValue(CF, CQ2)));
 117       assertNull(scanner.next());
 118     }
 119   }
 120
 121   @Test
 122   public void testCrossRowAtomicInRegion() throws IOException, InterruptedException {
 123     put(Bytes.toBytes("row1"), CQ1, Bytes.toBytes(1));
 124     put(Bytes.toBytes("row2"), CQ1, Bytes.toBytes(2));
 125     try (Table table = CONN.getTable(tableName);
 126         ResultScanner scanner = table.getScanner(new Scan().setCaching(1))) {
 127       Result result = scanner.next();
 128       assertArrayEquals(Bytes.toBytes("row1"), result.getRow());
 129       assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
 130       move();
 131       put(Bytes.toBytes("row3"), CQ1, Bytes.toBytes(3));
 132       result = scanner.next();
 133       assertArrayEquals(Bytes.toBytes("row2"), result.getRow());
 134       assertEquals(2, Bytes.toInt(result.getValue(CF, CQ1)));
 135       assertNull(scanner.next());
 136     }
 137   }
 138 }