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18 package org.apache.hadoop.hbase.snapshot;
19
20 import static org.junit.Assert.assertEquals;
21 import static org.junit.Assert.assertTrue;
22
23 import java.io.IOException;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.apache.hadoop.conf.Configuration;
28 import org.apache.hadoop.fs.FileSystem;
29 import org.apache.hadoop.fs.Path;
30 import org.apache.hadoop.hbase.HBaseTestingUtility;
31 import org.apache.hadoop.hbase.HConstants;
32 import org.apache.hadoop.hbase.HTableDescriptor;
33 import org.apache.hadoop.hbase.catalog.CatalogTracker;
34 import org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher;
35 import org.apache.hadoop.hbase.io.HFileLink;
36 import org.apache.hadoop.hbase.monitoring.MonitoredTask;
37 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
38 import org.apache.hadoop.hbase.regionserver.StoreFileInfo;
39 import org.apache.hadoop.hbase.snapshot.SnapshotTestingUtils.SnapshotMock;
40 import org.apache.hadoop.hbase.testclassification.SmallTests;
41 import org.apache.hadoop.hbase.util.FSTableDescriptors;
42 import org.apache.hadoop.hbase.util.FSUtils;
43 import org.junit.After;
44 import org.junit.Before;
45 import org.junit.Test;
46 import org.junit.experimental.categories.Category;
47 import org.mockito.Mockito;
48
49
50
51
52 @Category(SmallTests.class)
53 public class TestRestoreSnapshotHelper {
54 final Log LOG = LogFactory.getLog(getClass());
55
56 private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
57 private final static String TEST_HFILE = "abc";
58
59 private Configuration conf;
60 private Path archiveDir;
61 private FileSystem fs;
62 private Path rootDir;
63
64 @Before
65 public void setup() throws Exception {
66 rootDir = TEST_UTIL.getDataTestDir("testRestore");
67 archiveDir = new Path(rootDir, HConstants.HFILE_ARCHIVE_DIRECTORY);
68 fs = TEST_UTIL.getTestFileSystem();
69 conf = TEST_UTIL.getConfiguration();
70 FSUtils.setRootDir(conf, rootDir);
71 }
72
73 @After
74 public void tearDown() throws Exception {
75 fs.delete(TEST_UTIL.getDataTestDir(), true);
76 }
77
78 @Test
79 public void testRestore() throws IOException {
80
81
82 SnapshotMock snapshotMock = new SnapshotMock(TEST_UTIL.getConfiguration(), fs, rootDir);
83 SnapshotMock.SnapshotBuilder builder = snapshotMock.createSnapshotV2("snapshot");
84 builder.addRegionV1();
85 builder.addRegionV2();
86 builder.addRegionV2();
87 builder.addRegionV1();
88 Path snapshotDir = builder.commit();
89 HTableDescriptor htd = builder.getTableDescriptor();
90 SnapshotDescription desc = builder.getSnapshotDescription();
91
92
93 HTableDescriptor htdClone = snapshotMock.createHtd("testtb-clone");
94 testRestore(snapshotDir, desc, htdClone);
95 verifyRestore(rootDir, htd, htdClone);
96
97
98 SnapshotDescription cloneDesc = SnapshotDescription.newBuilder()
99 .setName("cloneSnapshot")
100 .setTable("testtb-clone")
101 .build();
102 Path cloneDir = FSUtils.getTableDir(rootDir, htdClone.getTableName());
103 HTableDescriptor htdClone2 = snapshotMock.createHtd("testtb-clone2");
104 testRestore(cloneDir, cloneDesc, htdClone2);
105 verifyRestore(rootDir, htd, htdClone2);
106 }
107
108 private void verifyRestore(final Path rootDir, final HTableDescriptor sourceHtd,
109 final HTableDescriptor htdClone) throws IOException {
110 String[] files = SnapshotTestingUtils.listHFileNames(fs,
111 FSUtils.getTableDir(rootDir, htdClone.getTableName()));
112 assertEquals(12, files.length);
113 for (int i = 0; i < files.length; i += 2) {
114 String linkFile = files[i];
115 String refFile = files[i+1];
116 assertTrue(linkFile + " should be a HFileLink", HFileLink.isHFileLink(linkFile));
117 assertTrue(refFile + " should be a Referene", StoreFileInfo.isReference(refFile));
118 assertEquals(sourceHtd.getTableName(), HFileLink.getReferencedTableName(linkFile));
119 Path refPath = getReferredToFile(refFile);
120 LOG.debug("get reference name for file " + refFile + " = " + refPath);
121 assertTrue(refPath.getName() + " should be a HFileLink", HFileLink.isHFileLink(refPath.getName()));
122 assertEquals(linkFile, refPath.getName());
123 }
124 }
125
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130
131
132 public void testRestore(final Path snapshotDir, final SnapshotDescription sd,
133 final HTableDescriptor htdClone) throws IOException {
134 LOG.debug("pre-restore table=" + htdClone.getTableName() + " snapshot=" + snapshotDir);
135 FSUtils.logFileSystemState(fs, rootDir, LOG);
136
137 new FSTableDescriptors(conf).createTableDescriptor(htdClone);
138 RestoreSnapshotHelper helper = getRestoreHelper(rootDir, snapshotDir, sd, htdClone);
139 helper.restoreHdfsRegions();
140
141 LOG.debug("post-restore table=" + htdClone.getTableName() + " snapshot=" + snapshotDir);
142 FSUtils.logFileSystemState(fs, rootDir, LOG);
143 }
144
145
146
147
148 private RestoreSnapshotHelper getRestoreHelper(final Path rootDir, final Path snapshotDir,
149 final SnapshotDescription sd, final HTableDescriptor htdClone) throws IOException {
150 CatalogTracker catalogTracker = Mockito.mock(CatalogTracker.class);
151 HTableDescriptor tableDescriptor = Mockito.mock(HTableDescriptor.class);
152 ForeignExceptionDispatcher monitor = Mockito.mock(ForeignExceptionDispatcher.class);
153 MonitoredTask status = Mockito.mock(MonitoredTask.class);
154
155 SnapshotManifest manifest = SnapshotManifest.open(conf, fs, snapshotDir, sd);
156 return new RestoreSnapshotHelper(conf, fs, manifest,
157 htdClone, rootDir, monitor, status);
158 }
159
160 private Path getReferredToFile(final String referenceName) {
161 Path fakeBasePath = new Path(new Path("table", "region"), "cf");
162 return StoreFileInfo.getReferredToFile(new Path(fakeBasePath, referenceName));
163 }
164 }