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.assertNull;
023
024import java.io.IOException;
025import org.apache.hadoop.hbase.HBaseClassTestRule;
026import org.apache.hadoop.hbase.HBaseTestingUtility;
027import org.apache.hadoop.hbase.TableName;
028import org.apache.hadoop.hbase.regionserver.HRegionServer;
029import org.apache.hadoop.hbase.testclassification.ClientTests;
030import org.apache.hadoop.hbase.testclassification.MediumTests;
031import org.apache.hadoop.hbase.util.Bytes;
032import org.junit.AfterClass;
033import org.junit.Before;
034import org.junit.BeforeClass;
035import org.junit.ClassRule;
036import org.junit.Rule;
037import org.junit.Test;
038import org.junit.experimental.categories.Category;
039import org.junit.rules.TestName;
040
041@Category({ MediumTests.class, ClientTests.class })
042public class TestMvccConsistentScanner {
043
044  @ClassRule
045  public static final HBaseClassTestRule CLASS_RULE =
046    HBaseClassTestRule.forClass(TestMvccConsistentScanner.class);
047
048  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
049
050  private static Connection CONN;
051
052  private static final byte[] CF = Bytes.toBytes("cf");
053
054  private static final byte[] CQ1 = Bytes.toBytes("cq1");
055
056  private static final byte[] CQ2 = Bytes.toBytes("cq2");
057
058  private static final byte[] CQ3 = Bytes.toBytes("cq3");
059  @Rule
060  public TestName testName = new TestName();
061
062  private TableName tableName;
063
064  @BeforeClass
065  public static void setUpBeforeClass() throws Exception {
066    UTIL.startMiniCluster(2);
067    CONN = ConnectionFactory.createConnection(UTIL.getConfiguration());
068  }
069
070  @AfterClass
071  public static void tearDownAfterClass() throws Exception {
072    CONN.close();
073    UTIL.shutdownMiniCluster();
074  }
075
076  @Before
077  public void setUp() throws IOException, InterruptedException {
078    tableName = TableName.valueOf(testName.getMethodName().replaceAll("[^0-9a-zA-Z]", "_"));
079    UTIL.createTable(tableName, CF);
080    UTIL.waitTableAvailable(tableName);
081  }
082
083  private void put(byte[] row, byte[] cq, byte[] value) throws IOException {
084    try (Table table = CONN.getTable(tableName)) {
085      table.put(new Put(row).addColumn(CF, cq, value));
086    }
087  }
088
089  private void move() throws IOException, InterruptedException {
090    RegionInfo region =
091      UTIL.getHBaseCluster().getRegions(tableName).stream().findAny().get().getRegionInfo();
092    HRegionServer rs =
093      UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer())
094        .filter(r -> !r.getOnlineTables().contains(tableName)).findAny().get();
095    UTIL.getAdmin().move(region.getEncodedNameAsBytes(), rs.getServerName());
096    while (UTIL.getRSForFirstRegionInTable(tableName) != rs) {
097      Thread.sleep(100);
098    }
099  }
100
101  @Test
102  public void testRowAtomic() throws IOException, InterruptedException {
103    byte[] row = Bytes.toBytes("row");
104    put(row, CQ1, Bytes.toBytes(1));
105    put(row, CQ2, Bytes.toBytes(2));
106    try (Table table = CONN.getTable(tableName);
107      ResultScanner scanner = table.getScanner(new Scan().setBatch(1).setCaching(1))) {
108      Result result = scanner.next();
109      assertEquals(1, result.rawCells().length);
110      assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
111      move();
112      put(row, CQ3, Bytes.toBytes(3));
113      result = scanner.next();
114      assertEquals(1, result.rawCells().length);
115      assertEquals(2, Bytes.toInt(result.getValue(CF, CQ2)));
116      assertNull(scanner.next());
117    }
118  }
119
120  @Test
121  public void testCrossRowAtomicInRegion() throws IOException, InterruptedException {
122    put(Bytes.toBytes("row1"), CQ1, Bytes.toBytes(1));
123    put(Bytes.toBytes("row2"), CQ1, Bytes.toBytes(2));
124    try (Table table = CONN.getTable(tableName);
125      ResultScanner scanner = table.getScanner(new Scan().setCaching(1))) {
126      Result result = scanner.next();
127      assertArrayEquals(Bytes.toBytes("row1"), result.getRow());
128      assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
129      move();
130      put(Bytes.toBytes("row3"), CQ1, Bytes.toBytes(3));
131      result = scanner.next();
132      assertArrayEquals(Bytes.toBytes("row2"), result.getRow());
133      assertEquals(2, Bytes.toInt(result.getValue(CF, CQ1)));
134      assertNull(scanner.next());
135    }
136  }
137}