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.util;
019
020import static org.junit.Assert.assertEquals;
021
022import java.io.IOException;
023import java.util.HashSet;
024import java.util.Set;
025import java.util.UUID;
026import org.apache.hadoop.fs.FileSystem;
027import org.apache.hadoop.fs.Path;
028import org.apache.hadoop.hbase.HBaseClassTestRule;
029import org.apache.hadoop.hbase.HBaseTestingUtility;
030import org.apache.hadoop.hbase.testclassification.MediumTests;
031import org.apache.hadoop.hbase.testclassification.MiscTests;
032import org.junit.After;
033import org.junit.Before;
034import org.junit.ClassRule;
035import org.junit.Test;
036import org.junit.experimental.categories.Category;
037import org.slf4j.Logger;
038import org.slf4j.LoggerFactory;
039
040/**
041 * Test {@link FSUtils}.
042 */
043@Category({MiscTests.class, MediumTests.class})
044public class TestFSVisitor {
045
046  @ClassRule
047  public static final HBaseClassTestRule CLASS_RULE =
048      HBaseClassTestRule.forClass(TestFSVisitor.class);
049
050  private static final Logger LOG = LoggerFactory.getLogger(TestFSVisitor.class);
051
052  private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
053
054  private final String TABLE_NAME = "testtb";
055
056  private Set<String> tableFamilies;
057  private Set<String> tableRegions;
058  private Set<String> tableHFiles;
059
060  private FileSystem fs;
061  private Path tableDir;
062  private Path rootDir;
063
064  @Before
065  public void setUp() throws Exception {
066    fs = FileSystem.get(TEST_UTIL.getConfiguration());
067    rootDir = TEST_UTIL.getDataTestDir("hbase");
068
069    tableFamilies = new HashSet<>();
070    tableRegions = new HashSet<>();
071    tableHFiles = new HashSet<>();
072    tableDir = createTableFiles(rootDir, TABLE_NAME, tableRegions, tableFamilies, tableHFiles);
073    FSUtils.logFileSystemState(fs, rootDir, LOG);
074  }
075
076  @After
077  public void tearDown() throws Exception {
078    fs.delete(rootDir, true);
079  }
080
081  @Test
082  public void testVisitStoreFiles() throws IOException {
083    final Set<String> regions = new HashSet<>();
084    final Set<String> families = new HashSet<>();
085    final Set<String> hfiles = new HashSet<>();
086    FSVisitor.visitTableStoreFiles(fs, tableDir, new FSVisitor.StoreFileVisitor() {
087      @Override
088      public void storeFile(final String region, final String family, final String hfileName)
089          throws IOException {
090        regions.add(region);
091        families.add(family);
092        hfiles.add(hfileName);
093      }
094    });
095    assertEquals(regions, tableRegions);
096    assertEquals(families, tableFamilies);
097    assertEquals(hfiles, tableHFiles);
098  }
099
100  /*
101   * |-testtb/
102   * |----f1d3ff8443297732862df21dc4e57262/
103   * |-------f1/
104   * |----------d0be84935ba84b66b1e866752ec5d663
105   * |----------9fc9d481718f4878b29aad0a597ecb94
106   * |-------f2/
107   * |----------4b0fe6068c564737946bcf4fd4ab8ae1
108   */
109  private Path createTableFiles(final Path rootDir, final String tableName,
110      final Set<String> tableRegions, final Set<String> tableFamilies,
111      final Set<String> tableHFiles) throws IOException {
112    Path tableDir = new Path(rootDir, tableName);
113    for (int r = 0; r < 10; ++r) {
114      String regionName = MD5Hash.getMD5AsHex(Bytes.toBytes(r));
115      tableRegions.add(regionName);
116      Path regionDir = new Path(tableDir, regionName);
117      for (int f = 0; f < 3; ++f) {
118        String familyName = "f" + f;
119        tableFamilies.add(familyName);
120        Path familyDir = new Path(regionDir, familyName);
121        fs.mkdirs(familyDir);
122        for (int h = 0; h < 5; ++h) {
123         String hfileName = UUID.randomUUID().toString().replaceAll("-", "");
124         tableHFiles.add(hfileName);
125         fs.createNewFile(new Path(familyDir, hfileName));
126        }
127      }
128    }
129    return tableDir;
130  }
131}