/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.snapshot;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.testclassification.RegionServerTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher;
import org.apache.hadoop.hbase.io.HFileLink;
import org.apache.hadoop.hbase.monitoring.MonitoredTask;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
import org.apache.hadoop.hbase.regionserver.StoreFileInfo;
import org.apache.hadoop.hbase.snapshot.SnapshotTestingUtils.SnapshotMock;
import org.apache.hadoop.hbase.util.FSTableDescriptors;
import org.apache.hadoop.hbase.util.FSUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.Mockito;
/**
* Test the restore/clone operation from a file-system point of view.
*/
@Category({RegionServerTests.class, SmallTests.class})
public class TestRestoreSnapshotHelper {
final Log LOG = LogFactory.getLog(getClass());
private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
private final static String TEST_HFILE = "abc";
private Configuration conf;
private Path archiveDir;
private FileSystem fs;
private Path rootDir;
@Before
public void setup() throws Exception {
rootDir = TEST_UTIL.getDataTestDir("testRestore");
archiveDir = new Path(rootDir, HConstants.HFILE_ARCHIVE_DIRECTORY);
fs = TEST_UTIL.getTestFileSystem();
conf = TEST_UTIL.getConfiguration();
FSUtils.setRootDir(conf, rootDir);
}
@After
public void tearDown() throws Exception {
fs.delete(TEST_UTIL.getDataTestDir(), true);
}
@Test
public void testRestore() throws IOException {
// Test Rolling-Upgrade like Snapshot.
// half machines writing using v1 and the others using v2 format.
SnapshotMock snapshotMock = new SnapshotMock(TEST_UTIL.getConfiguration(), fs, rootDir);
SnapshotMock.SnapshotBuilder builder = snapshotMock.createSnapshotV2("snapshot");
builder.addRegionV1();
builder.addRegionV2();
builder.addRegionV2();
builder.addRegionV1();
Path snapshotDir = builder.commit();
HTableDescriptor htd = builder.getTableDescriptor();
SnapshotDescription desc = builder.getSnapshotDescription();
// Test clone a snapshot
HTableDescriptor htdClone = snapshotMock.createHtd("testtb-clone");
testRestore(snapshotDir, desc, htdClone);
verifyRestore(rootDir, htd, htdClone);
// Test clone a clone ("link to link")
SnapshotDescription cloneDesc = SnapshotDescription.newBuilder()
.setName("cloneSnapshot")
.setTable("testtb-clone")
.build();
Path cloneDir = FSUtils.getTableDir(rootDir, htdClone.getTableName());
HTableDescriptor htdClone2 = snapshotMock.createHtd("testtb-clone2");
testRestore(cloneDir, cloneDesc, htdClone2);
verifyRestore(rootDir, htd, htdClone2);
}
private void verifyRestore(final Path rootDir, final HTableDescriptor sourceHtd,
final HTableDescriptor htdClone) throws IOException {
String[] files = SnapshotTestingUtils.listHFileNames(fs,
FSUtils.getTableDir(rootDir, htdClone.getTableName()));
assertEquals(12, files.length);
for (int i = 0; i < files.length; i += 2) {
String linkFile = files[i];
String refFile = files[i+1];
assertTrue(linkFile + " should be a HFileLink", HFileLink.isHFileLink(linkFile));
assertTrue(refFile + " should be a Referene", StoreFileInfo.isReference(refFile));
assertEquals(sourceHtd.getTableName(), HFileLink.getReferencedTableName(linkFile));
Path refPath = getReferredToFile(refFile);
LOG.debug("get reference name for file " + refFile + " = " + refPath);
assertTrue(refPath.getName() + " should be a HFileLink", HFileLink.isHFileLink(refPath.getName()));
assertEquals(linkFile, refPath.getName());
}
}
/**
* Execute the restore operation
* @param snapshotDir The snapshot directory to use as "restore source"
* @param sd The snapshot descriptor
* @param htdClone The HTableDescriptor of the table to restore/clone.
*/
public void testRestore(final Path snapshotDir, final SnapshotDescription sd,
final HTableDescriptor htdClone) throws IOException {
LOG.debug("pre-restore table=" + htdClone.getTableName() + " snapshot=" + snapshotDir);
FSUtils.logFileSystemState(fs, rootDir, LOG);
new FSTableDescriptors(conf).createTableDescriptor(htdClone);
RestoreSnapshotHelper helper = getRestoreHelper(rootDir, snapshotDir, sd, htdClone);
helper.restoreHdfsRegions();
LOG.debug("post-restore table=" + htdClone.getTableName() + " snapshot=" + snapshotDir);
FSUtils.logFileSystemState(fs, rootDir, LOG);
}
/**
* Initialize the restore helper, based on the snapshot and table information provided.
*/
private RestoreSnapshotHelper getRestoreHelper(final Path rootDir, final Path snapshotDir,
final SnapshotDescription sd, final HTableDescriptor htdClone) throws IOException {
ForeignExceptionDispatcher monitor = Mockito.mock(ForeignExceptionDispatcher.class);
MonitoredTask status = Mockito.mock(MonitoredTask.class);
SnapshotManifest manifest = SnapshotManifest.open(conf, fs, snapshotDir, sd);
return new RestoreSnapshotHelper(conf, fs, manifest,
htdClone, rootDir, monitor, status);
}
private Path getReferredToFile(final String referenceName) {
Path fakeBasePath = new Path(new Path("table", "region"), "cf");
return StoreFileInfo.getReferredToFile(new Path(fakeBasePath, referenceName));
}
}