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 import java.io.IOException;
  24 import org.apache.hadoop.hbase.HBaseClassTestRule;
  25 import org.apache.hadoop.hbase.HBaseTestingUtil;
  26 import org.apache.hadoop.hbase.TableName;
  27 import org.apache.hadoop.hbase.regionserver.HRegionServer;
  28 import org.apache.hadoop.hbase.testclassification.ClientTests;
  29 import org.apache.hadoop.hbase.testclassification.MediumTests;
  30 import org.apache.hadoop.hbase.util.Bytes;
  31 import org.junit.AfterClass;
  32 import org.junit.Before;
  33 import org.junit.BeforeClass;
  34 import org.junit.ClassRule;
  35 import org.junit.Rule;
  36 import org.junit.Test;
  37 import org.junit.experimental.categories.Category;
  38 import org.junit.rules.TestName;
  39
  40 @Category({ MediumTests.class, ClientTests.class })
  41 public class TestMvccConsistentScanner {
  42
  43   @ClassRule
  44   public static final HBaseClassTestRule CLASS_RULE =
  45       HBaseClassTestRule.forClass(TestMvccConsistentScanner.class);
  46
  47   private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
  48
  49   private static Connection CONN;
  50
  51   private static final byte[] CF = Bytes.toBytes("cf");
  52
  53   private static final byte[] CQ1 = Bytes.toBytes("cq1");
  54
  55   private static final byte[] CQ2 = Bytes.toBytes("cq2");
  56
  57   private static final byte[] CQ3 = Bytes.toBytes("cq3");
  58   @Rule
  59   public TestName testName = new TestName();
  60
  61   private TableName tableName;
  62
  63   @BeforeClass
  64   public static void setUpBeforeClass() throws Exception {
  65     UTIL.startMiniCluster(2);
  66     CONN = ConnectionFactory.createConnection(UTIL.getConfiguration());
  67   }
  68
  69   @AfterClass
  70   public static void tearDownAfterClass() throws Exception {
  71     CONN.close();
  72     UTIL.shutdownMiniCluster();
  73   }
  74
  75   @Before
  76   public void setUp() throws IOException, InterruptedException {
  77     tableName = TableName.valueOf(testName.getMethodName().replaceAll("[^0-9a-zA-Z]", "_"));
  78     UTIL.createTable(tableName, CF);
  79     UTIL.waitTableAvailable(tableName);
  80   }
  81
  82   private void put(byte[] row, byte[] cq, byte[] value) throws IOException {
  83     try (Table table = CONN.getTable(tableName)) {
  84       table.put(new Put(row).addColumn(CF, cq, value));
  85     }
  86   }
  87
  88   private void move() throws IOException, InterruptedException {
  89     RegionInfo region =
  90         UTIL.getHBaseCluster().getRegions(tableName).stream().findAny().get().getRegionInfo();
  91     HRegionServer rs =
  92         UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer())
  93             .filter(r -> !r.getOnlineTables().contains(tableName)).findAny().get();
  94     UTIL.getAdmin().move(region.getEncodedNameAsBytes(), rs.getServerName());
  95     while (UTIL.getRSForFirstRegionInTable(tableName) != rs) {
  96       Thread.sleep(100);
  97     }
  98   }
  99
 100   @Test
 101   public void testRowAtomic() throws IOException, InterruptedException {
 102     byte[] row = Bytes.toBytes("row");
 103     put(row, CQ1, Bytes.toBytes(1));
 104     put(row, CQ2, Bytes.toBytes(2));
 105     try (Table table = CONN.getTable(tableName);
 106         ResultScanner scanner = table.getScanner(new Scan().setBatch(1).setCaching(1))) {
 107       Result result = scanner.next();
 108       assertEquals(1, result.rawCells().length);
 109       assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
 110       move();
 111       put(row, CQ3, Bytes.toBytes(3));
 112       result = scanner.next();
 113       assertEquals(1, result.rawCells().length);
 114       assertEquals(2, Bytes.toInt(result.getValue(CF, CQ2)));
 115       assertNull(scanner.next());
 116     }
 117   }
 118
 119   @Test
 120   public void testCrossRowAtomicInRegion() throws IOException, InterruptedException {
 121     put(Bytes.toBytes("row1"), CQ1, Bytes.toBytes(1));
 122     put(Bytes.toBytes("row2"), CQ1, Bytes.toBytes(2));
 123     try (Table table = CONN.getTable(tableName);
 124         ResultScanner scanner = table.getScanner(new Scan().setCaching(1))) {
 125       Result result = scanner.next();
 126       assertArrayEquals(Bytes.toBytes("row1"), result.getRow());
 127       assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
 128       move();
 129       put(Bytes.toBytes("row3"), CQ1, Bytes.toBytes(3));
 130       result = scanner.next();
 131       assertArrayEquals(Bytes.toBytes("row2"), result.getRow());
 132       assertEquals(2, Bytes.toInt(result.getValue(CF, CQ1)));
 133       assertNull(scanner.next());
 134     }
 135   }
 136 }