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.jupiter.api.Assertions.assertArrayEquals;
021import static org.junit.jupiter.api.Assertions.assertEquals;
022import static org.junit.jupiter.api.Assertions.assertNull;
023
024import java.io.IOException;
025import org.apache.hadoop.hbase.HBaseTestingUtil;
026import org.apache.hadoop.hbase.TableName;
027import org.apache.hadoop.hbase.regionserver.HRegionServer;
028import org.apache.hadoop.hbase.testclassification.ClientTests;
029import org.apache.hadoop.hbase.testclassification.MediumTests;
030import org.apache.hadoop.hbase.util.Bytes;
031import org.junit.jupiter.api.AfterAll;
032import org.junit.jupiter.api.BeforeAll;
033import org.junit.jupiter.api.BeforeEach;
034import org.junit.jupiter.api.Tag;
035import org.junit.jupiter.api.Test;
036import org.junit.jupiter.api.TestInfo;
037
038@Tag(MediumTests.TAG)
039@Tag(ClientTests.TAG)
040public class TestMvccConsistentScanner {
041
042  private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
043
044  private static Connection CONN;
045
046  private static final byte[] CF = Bytes.toBytes("cf");
047
048  private static final byte[] CQ1 = Bytes.toBytes("cq1");
049
050  private static final byte[] CQ2 = Bytes.toBytes("cq2");
051
052  private static final byte[] CQ3 = Bytes.toBytes("cq3");
053
054  private TableName tableName;
055
056  @BeforeAll
057  public static void setUpBeforeClass() throws Exception {
058    UTIL.startMiniCluster(2);
059    CONN = ConnectionFactory.createConnection(UTIL.getConfiguration());
060  }
061
062  @AfterAll
063  public static void tearDownAfterClass() throws Exception {
064    CONN.close();
065    UTIL.shutdownMiniCluster();
066  }
067
068  @BeforeEach
069  public void setUp(TestInfo testInfo) throws IOException, InterruptedException {
070    tableName = TableName.valueOf(testInfo.getTestMethod().get().getName());
071    UTIL.createTable(tableName, CF);
072    UTIL.waitTableAvailable(tableName);
073  }
074
075  private void put(byte[] row, byte[] cq, byte[] value) throws IOException {
076    try (Table table = CONN.getTable(tableName)) {
077      table.put(new Put(row).addColumn(CF, cq, value));
078    }
079  }
080
081  private void move() throws IOException, InterruptedException {
082    RegionInfo region =
083      UTIL.getHBaseCluster().getRegions(tableName).stream().findAny().get().getRegionInfo();
084    HRegionServer rs =
085      UTIL.getHBaseCluster().getRegionServerThreads().stream().map(t -> t.getRegionServer())
086        .filter(r -> !r.getOnlineTables().contains(tableName)).findAny().get();
087    UTIL.getAdmin().move(region.getEncodedNameAsBytes(), rs.getServerName());
088    while (UTIL.getRSForFirstRegionInTable(tableName) != rs) {
089      Thread.sleep(100);
090    }
091  }
092
093  @Test
094  public void testRowAtomic() throws IOException, InterruptedException {
095    byte[] row = Bytes.toBytes("row");
096    put(row, CQ1, Bytes.toBytes(1));
097    put(row, CQ2, Bytes.toBytes(2));
098    try (Table table = CONN.getTable(tableName);
099      ResultScanner scanner = table.getScanner(new Scan().setBatch(1).setCaching(1))) {
100      Result result = scanner.next();
101      assertEquals(1, result.rawCells().length);
102      assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
103      move();
104      put(row, CQ3, Bytes.toBytes(3));
105      result = scanner.next();
106      assertEquals(1, result.rawCells().length);
107      assertEquals(2, Bytes.toInt(result.getValue(CF, CQ2)));
108      assertNull(scanner.next());
109    }
110  }
111
112  @Test
113  public void testCrossRowAtomicInRegion() throws IOException, InterruptedException {
114    put(Bytes.toBytes("row1"), CQ1, Bytes.toBytes(1));
115    put(Bytes.toBytes("row2"), CQ1, Bytes.toBytes(2));
116    try (Table table = CONN.getTable(tableName);
117      ResultScanner scanner = table.getScanner(new Scan().setCaching(1))) {
118      Result result = scanner.next();
119      assertArrayEquals(Bytes.toBytes("row1"), result.getRow());
120      assertEquals(1, Bytes.toInt(result.getValue(CF, CQ1)));
121      move();
122      put(Bytes.toBytes("row3"), CQ1, Bytes.toBytes(3));
123      result = scanner.next();
124      assertArrayEquals(Bytes.toBytes("row2"), result.getRow());
125      assertEquals(2, Bytes.toInt(result.getValue(CF, CQ1)));
126      assertNull(scanner.next());
127    }
128  }
129}