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.regionserver;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertTrue;
023
024import java.io.IOException;
025import java.util.ArrayList;
026import java.util.List;
027import java.util.concurrent.ThreadLocalRandom;
028import org.apache.hadoop.hbase.Cell;
029import org.apache.hadoop.hbase.HBaseClassTestRule;
030import org.apache.hadoop.hbase.HBaseTestingUtility;
031import org.apache.hadoop.hbase.TableName;
032import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
033import org.apache.hadoop.hbase.client.Put;
034import org.apache.hadoop.hbase.client.Result;
035import org.apache.hadoop.hbase.client.Scan;
036import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
037import org.apache.hadoop.hbase.regionserver.HRegion.RegionScannerImpl;
038import org.apache.hadoop.hbase.testclassification.MediumTests;
039import org.apache.hadoop.hbase.testclassification.RegionServerTests;
040import org.apache.hadoop.hbase.util.Bytes;
041import org.junit.AfterClass;
042import org.junit.BeforeClass;
043import org.junit.ClassRule;
044import org.junit.Test;
045import org.junit.experimental.categories.Category;
046
047@Category({ RegionServerTests.class, MediumTests.class })
048public class TestSwitchToStreamRead {
049
050  @ClassRule
051  public static final HBaseClassTestRule CLASS_RULE =
052      HBaseClassTestRule.forClass(TestSwitchToStreamRead.class);
053
054  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
055
056  private static TableName TABLE_NAME = TableName.valueOf("stream");
057
058  private static byte[] FAMILY = Bytes.toBytes("cf");
059
060  private static byte[] QUAL = Bytes.toBytes("cq");
061
062  private static String VALUE_PREFIX;
063
064  private static HRegion REGION;
065
066  @BeforeClass
067  public static void setUp() throws IOException {
068    UTIL.getConfiguration().setLong(StoreScanner.STORESCANNER_PREAD_MAX_BYTES, 2048);
069    StringBuilder sb = new StringBuilder(256);
070    for (int i = 0; i < 255; i++) {
071      sb.append((char) ThreadLocalRandom.current().nextInt('A', 'z' + 1));
072    }
073    VALUE_PREFIX = sb.append("-").toString();
074    REGION = UTIL.createLocalHRegion(
075      TableDescriptorBuilder.newBuilder(TABLE_NAME)
076          .setColumnFamily(
077            ColumnFamilyDescriptorBuilder.newBuilder(FAMILY).setBlocksize(1024).build())
078          .build(),
079      null, null);
080    for (int i = 0; i < 900; i++) {
081      REGION
082          .put(new Put(Bytes.toBytes(i)).addColumn(FAMILY, QUAL, Bytes.toBytes(VALUE_PREFIX + i)));
083    }
084    REGION.flush(true);
085    for (int i = 900; i < 1000; i++) {
086      REGION
087          .put(new Put(Bytes.toBytes(i)).addColumn(FAMILY, QUAL, Bytes.toBytes(VALUE_PREFIX + i)));
088    }
089  }
090
091  @AfterClass
092  public static void tearDown() throws IOException {
093    REGION.close(true);
094    UTIL.cleanupTestDir();
095  }
096
097  @Test
098  public void test() throws IOException {
099    try (RegionScannerImpl scanner = REGION.getScanner(new Scan())) {
100      StoreScanner storeScanner = (StoreScanner) (scanner)
101          .getStoreHeapForTesting().getCurrentForTesting();
102      for (KeyValueScanner kvs : storeScanner.getAllScannersForTesting()) {
103        if (kvs instanceof StoreFileScanner) {
104          StoreFileScanner sfScanner = (StoreFileScanner) kvs;
105          // starting from pread so we use shared reader here.
106          assertTrue(sfScanner.getReader().shared);
107        }
108      }
109      List<Cell> cells = new ArrayList<>();
110      for (int i = 0; i < 500; i++) {
111        assertTrue(scanner.next(cells));
112        Result result = Result.create(cells);
113        assertEquals(VALUE_PREFIX + i, Bytes.toString(result.getValue(FAMILY, QUAL)));
114        cells.clear();
115        scanner.shipped();
116      }
117      for (KeyValueScanner kvs : storeScanner.getAllScannersForTesting()) {
118        if (kvs instanceof StoreFileScanner) {
119          StoreFileScanner sfScanner = (StoreFileScanner) kvs;
120          // we should have convert to use stream read now.
121          assertFalse(sfScanner.getReader().shared);
122        }
123      }
124      for (int i = 500; i < 1000; i++) {
125        assertEquals(i != 999, scanner.next(cells));
126        Result result = Result.create(cells);
127        assertEquals(VALUE_PREFIX + i, Bytes.toString(result.getValue(FAMILY, QUAL)));
128        cells.clear();
129        scanner.shipped();
130      }
131    }
132    // make sure all scanners are closed.
133    for (HStoreFile sf : REGION.getStore(FAMILY).getStorefiles()) {
134      assertFalse(sf.isReferencedInReads());
135    }
136  }
137}