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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.client;
20  
21  import java.io.IOException;
22  import java.util.Arrays;
23  
24  import org.apache.commons.logging.Log;
25  import org.apache.commons.logging.LogFactory;
26  import org.apache.hadoop.conf.Configuration;
27  import org.apache.hadoop.fs.FileSystem;
28  import org.apache.hadoop.fs.Path;
29  import org.apache.hadoop.hbase.Cell;
30  import org.apache.hadoop.hbase.CellScanner;
31  import org.apache.hadoop.hbase.HBaseTestingUtility;
32  import org.apache.hadoop.hbase.testclassification.LargeTests;
33  import org.apache.hadoop.hbase.TableName;
34  import org.apache.hadoop.hbase.mapreduce.TestTableSnapshotInputFormat;
35  import org.apache.hadoop.hbase.master.snapshot.SnapshotManager;
36  import org.apache.hadoop.hbase.snapshot.SnapshotTestingUtils;
37  import org.apache.hadoop.hbase.util.Bytes;
38  import org.apache.hadoop.hbase.util.FSUtils;
39  import org.junit.After;
40  import org.junit.Assert;
41  import org.junit.Test;
42  import org.junit.experimental.categories.Category;
43  
44  @Category(LargeTests.class)
45  public class TestTableSnapshotScanner {
46  
47    private static final Log LOG = LogFactory.getLog(TestTableSnapshotInputFormat.class);
48    private final HBaseTestingUtility UTIL = new HBaseTestingUtility();
49    private static final int NUM_REGION_SERVERS = 2;
50    private static final byte[][] FAMILIES = {Bytes.toBytes("f1"), Bytes.toBytes("f2")};
51    public static byte[] bbb = Bytes.toBytes("bbb");
52    public static byte[] yyy = Bytes.toBytes("yyy");
53  
54    private FileSystem fs;
55    private Path rootDir;
56  
57    public void setupCluster() throws Exception {
58      setupConf(UTIL.getConfiguration());
59      UTIL.startMiniCluster(NUM_REGION_SERVERS);
60      rootDir = UTIL.getHBaseCluster().getMaster().getMasterFileSystem().getRootDir();
61      fs = rootDir.getFileSystem(UTIL.getConfiguration());
62    }
63  
64    public void tearDownCluster() throws Exception {
65      UTIL.shutdownMiniCluster();
66    }
67  
68    private static void setupConf(Configuration conf) {
69      // Enable snapshot
70      conf.setBoolean(SnapshotManager.HBASE_SNAPSHOT_ENABLED, true);
71    }
72  
73    @After
74    public void tearDown() throws Exception {
75    }
76  
77    public static void createTableAndSnapshot(HBaseTestingUtility util, TableName tableName,
78        String snapshotName, int numRegions)
79        throws Exception {
80      try {
81        util.deleteTable(tableName);
82      } catch(Exception ex) {
83        // ignore
84      }
85  
86      if (numRegions > 1) {
87        util.createTable(tableName, FAMILIES, 1, bbb, yyy, numRegions);
88      } else {
89        util.createTable(tableName, FAMILIES);
90      }
91      HBaseAdmin admin = util.getHBaseAdmin();
92  
93      // put some stuff in the table
94      HTable table = new HTable(util.getConfiguration(), tableName);
95      util.loadTable(table, FAMILIES);
96  
97      Path rootDir = FSUtils.getRootDir(util.getConfiguration());
98      FileSystem fs = rootDir.getFileSystem(util.getConfiguration());
99  
100     SnapshotTestingUtils.createSnapshotAndValidate(admin, tableName,
101         Arrays.asList(FAMILIES), null, snapshotName, rootDir, fs, true);
102 
103     // load different values
104     byte[] value = Bytes.toBytes("after_snapshot_value");
105     util.loadTable(table, FAMILIES, value);
106 
107     // cause flush to create new files in the region
108     admin.flush(tableName.toString());
109     table.close();
110   }
111 
112   @Test
113   public void testWithSingleRegion() throws Exception {
114     testScanner(UTIL, "testWithSingleRegion", 1, false);
115   }
116 
117   @Test
118   public void testWithMultiRegion() throws Exception {
119     testScanner(UTIL, "testWithMultiRegion", 10, false);
120   }
121 
122   @Test
123   public void testWithOfflineHBaseMultiRegion() throws Exception {
124     testScanner(UTIL, "testWithMultiRegion", 20, true);
125   }
126 
127   private void testScanner(HBaseTestingUtility util, String snapshotName, int numRegions,
128       boolean shutdownCluster) throws Exception {
129     setupCluster();
130     TableName tableName = TableName.valueOf("testScanner");
131     try {
132       createTableAndSnapshot(util, tableName, snapshotName, numRegions);
133 
134       if (shutdownCluster) {
135         util.shutdownMiniHBaseCluster();
136       }
137 
138       Path restoreDir = util.getDataTestDirOnTestFS(snapshotName);
139       Scan scan = new Scan(bbb, yyy); // limit the scan
140 
141       TableSnapshotScanner scanner = new TableSnapshotScanner(UTIL.getConfiguration(), restoreDir,
142         snapshotName, scan);
143 
144       verifyScanner(scanner, bbb, yyy);
145       scanner.close();
146     } finally {
147       if (!shutdownCluster) {
148         util.getHBaseAdmin().deleteSnapshot(snapshotName);
149         util.deleteTable(tableName);
150         tearDownCluster();
151       }
152     }
153   }
154 
155   private void verifyScanner(ResultScanner scanner, byte[] startRow, byte[] stopRow)
156       throws IOException, InterruptedException {
157 
158     HBaseTestingUtility.SeenRowTracker rowTracker =
159         new HBaseTestingUtility.SeenRowTracker(startRow, stopRow);
160 
161     while (true) {
162       Result result = scanner.next();
163       if (result == null) {
164         break;
165       }
166       verifyRow(result);
167       rowTracker.addRow(result.getRow());
168     }
169 
170     // validate all rows are seen
171     rowTracker.validate();
172   }
173 
174   private static void verifyRow(Result result) throws IOException {
175     byte[] row = result.getRow();
176     CellScanner scanner = result.cellScanner();
177     while (scanner.advance()) {
178       Cell cell = scanner.current();
179 
180       //assert that all Cells in the Result have the same key
181      Assert.assertEquals(0, Bytes.compareTo(row, 0, row.length,
182          cell.getRowArray(), cell.getRowOffset(), cell.getRowLength()));
183     }
184 
185     for (int j = 0; j < FAMILIES.length; j++) {
186       byte[] actual = result.getValue(FAMILIES[j], null);
187       Assert.assertArrayEquals("Row in snapshot does not match, expected:" + Bytes.toString(row)
188           + " ,actual:" + Bytes.toString(actual), row, actual);
189     }
190   }
191 
192 }