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.wal;
019
020import static org.junit.Assert.assertEquals;
021
022import java.io.IOException;
023import java.util.ArrayList;
024import java.util.Collections;
025import java.util.List;
026import org.apache.hadoop.conf.Configuration;
027import org.apache.hadoop.fs.FileStatus;
028import org.apache.hadoop.fs.FileSystem;
029import org.apache.hadoop.fs.Path;
030import org.apache.hadoop.hbase.HBaseClassTestRule;
031import org.apache.hadoop.hbase.HBaseTestingUtility;
032import org.apache.hadoop.hbase.HConstants;
033import org.apache.hadoop.hbase.KeyValue;
034import org.apache.hadoop.hbase.TableName;
035import org.apache.hadoop.hbase.client.RegionInfo;
036import org.apache.hadoop.hbase.client.RegionInfoBuilder;
037import org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl;
038import org.apache.hadoop.hbase.testclassification.MediumTests;
039import org.apache.hadoop.hbase.util.Bytes;
040import org.apache.hadoop.hbase.util.FSUtils;
041import org.junit.AfterClass;
042import org.junit.Before;
043import org.junit.BeforeClass;
044import org.junit.ClassRule;
045import org.junit.Test;
046import org.junit.experimental.categories.Category;
047import org.slf4j.Logger;
048import org.slf4j.LoggerFactory;
049
050@Category(MediumTests.class)
051public class TestWALRootDir {
052
053  @ClassRule
054  public static final HBaseClassTestRule CLASS_RULE =
055      HBaseClassTestRule.forClass(TestWALRootDir.class);
056
057  private static final Logger LOG = LoggerFactory.getLogger(TestWALRootDir.class);
058  private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
059  private static Configuration conf;
060  private static FileSystem fs;
061  private static FileSystem walFs;
062  private static final TableName tableName = TableName.valueOf("TestWALWALDir");
063  private static final byte [] rowName = Bytes.toBytes("row");
064  private static final byte [] family = Bytes.toBytes("column");
065  private static Path walRootDir;
066  private static Path rootDir;
067  private static WALFactory wals;
068
069  @Before
070  public void setUp() throws Exception {
071    cleanup();
072  }
073
074  @BeforeClass
075  public static void setUpBeforeClass() throws Exception {
076    conf = TEST_UTIL.getConfiguration();
077    TEST_UTIL.startMiniDFSCluster(1);
078    rootDir = TEST_UTIL.createRootDir();
079    walRootDir = TEST_UTIL.createWALRootDir();
080    fs = FSUtils.getRootDirFileSystem(conf);
081    walFs = FSUtils.getWALFileSystem(conf);
082  }
083
084  @AfterClass
085  public static void tearDownAfterClass() throws Exception {
086    cleanup();
087    TEST_UTIL.shutdownMiniDFSCluster();
088  }
089
090  @Test
091  public void testWALRootDir() throws Exception {
092    RegionInfo regionInfo = RegionInfoBuilder.newBuilder(tableName).build();
093    wals = new WALFactory(conf, "testWALRootDir");
094    WAL log = wals.getWAL(regionInfo);
095
096    assertEquals(1, getWALFiles(walFs, walRootDir).size());
097    byte [] value = Bytes.toBytes("value");
098    WALEdit edit = new WALEdit();
099    edit.add(new KeyValue(rowName, family, Bytes.toBytes("1"),
100        System.currentTimeMillis(), value));
101    long txid = log.append(regionInfo,
102        getWalKey(System.currentTimeMillis(), regionInfo, 0), edit, true);
103    log.sync(txid);
104    assertEquals("Expect 1 log have been created", 1,
105        getWALFiles(walFs, walRootDir).size());
106    log.rollWriter();
107    //Create 1 more WAL
108    assertEquals(2, getWALFiles(walFs, new Path(walRootDir,
109        HConstants.HREGION_LOGDIR_NAME)).size());
110    edit.add(new KeyValue(rowName, family, Bytes.toBytes("2"),
111        System.currentTimeMillis(), value));
112    txid = log.append(regionInfo, getWalKey(System.currentTimeMillis(), regionInfo, 1),
113        edit, true);
114    log.sync(txid);
115    log.rollWriter();
116    log.shutdown();
117
118    assertEquals("Expect 3 logs in WALs dir", 3, getWALFiles(walFs,
119        new Path(walRootDir, HConstants.HREGION_LOGDIR_NAME)).size());
120  }
121
122  private WALKeyImpl getWalKey(final long time, RegionInfo hri, final long startPoint) {
123    return new WALKeyImpl(hri.getEncodedNameAsBytes(), tableName, time,
124        new MultiVersionConcurrencyControl(startPoint));
125  }
126
127  private List<FileStatus> getWALFiles(FileSystem fs, Path dir)
128      throws IOException {
129    List<FileStatus> result = new ArrayList<FileStatus>();
130    LOG.debug("Scanning " + dir.toString() + " for WAL files");
131
132    FileStatus[] files = fs.listStatus(dir);
133    if (files == null) return Collections.emptyList();
134    for (FileStatus file : files) {
135      if (file.isDirectory()) {
136        // recurse into sub directories
137        result.addAll(getWALFiles(fs, file.getPath()));
138      } else {
139        String name = file.getPath().toString();
140        if (!name.startsWith(".")) {
141          result.add(file);
142        }
143      }
144    }
145    return result;
146  }
147
148  private static void cleanup() throws Exception{
149    walFs.delete(walRootDir, true);
150    fs.delete(rootDir, true);
151  }
152
153}
154