/**
* 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 java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.master.HMaster;
import org.apache.hadoop.hbase.master.MasterFileSystem;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.HRegionServer;
import org.apache.hadoop.hbase.snapshot.HBaseSnapshotException;
import org.apache.hadoop.hbase.snapshot.HSnapshotDescription;
import org.apache.hadoop.hbase.snapshot.TakeSnapshotUtils;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.FSTableDescriptors;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.MD5Hash;
import org.junit.Assert;
/**
* Utilities class for snapshots
*/
public class SnapshotTestingUtils {
private static final Log LOG = LogFactory.getLog(SnapshotTestingUtils.class);
/**
* Assert that we don't have any snapshots lists
* @throws IOException if the admin operation fails
*/
public static void assertNoSnapshots(HBaseAdmin admin) throws IOException {
assertEquals("Have some previous snapshots", 0, admin.listSnapshots().size());
}
/**
* Make sure that there is only one snapshot returned from the master and its name and table match
* the passed in parameters.
*/
public static void assertOneSnapshotThatMatches(HBaseAdmin admin, HSnapshotDescription snapshot)
throws IOException {
assertOneSnapshotThatMatches(admin, snapshot.getName(), snapshot.getTable());
}
/**
* Make sure that there is only one snapshot returned from the master and its name and table match
* the passed in parameters.
*/
public static void assertOneSnapshotThatMatches(HBaseAdmin admin, SnapshotDescription snapshot)
throws IOException {
assertOneSnapshotThatMatches(admin, snapshot.getName(), snapshot.getTable());
}
/**
* Make sure that there is only one snapshot returned from the master and its name and table match
* the passed in parameters.
*/
public static List<SnapshotDescription> assertOneSnapshotThatMatches(HBaseAdmin admin,
String snapshotName, String tableName) throws IOException {
// list the snapshot
List<SnapshotDescription> snapshots = admin.listSnapshots();
assertEquals("Should only have 1 snapshot", 1, snapshots.size());
assertEquals(snapshotName, snapshots.get(0).getName());
assertEquals(tableName, snapshots.get(0).getTable());
return snapshots;
}
/**
* Make sure that there is only one snapshot returned from the master and its name and table match
* the passed in parameters.
*/
public static List<SnapshotDescription> assertOneSnapshotThatMatches(HBaseAdmin admin,
byte[] snapshot, byte[] tableName) throws IOException {
return assertOneSnapshotThatMatches(admin, Bytes.toString(snapshot), Bytes.toString(tableName));
}
/**
* Confirm that the snapshot contains references to all the files that should be in the snapshot
*/
public static void confirmSnapshotValid(SnapshotDescription snapshotDescriptor,
byte[] tableName, byte[] testFamily, Path rootDir, HBaseAdmin admin, FileSystem fs,
boolean requireLogs, Path logsDir, Set<String> snapshotServers) throws IOException {
Path snapshotDir = SnapshotDescriptionUtils
.getCompletedSnapshotDir(snapshotDescriptor, rootDir);
assertTrue(fs.exists(snapshotDir));
Path snapshotinfo = new Path(snapshotDir, SnapshotDescriptionUtils.SNAPSHOTINFO_FILE);
assertTrue(fs.exists(snapshotinfo));
// check the logs dir
if (requireLogs) {
TakeSnapshotUtils.verifyAllLogsGotReferenced(fs, logsDir, snapshotServers,
snapshotDescriptor, new Path(snapshotDir, HConstants.HREGION_LOGDIR_NAME));
}
// check the table info
HTableDescriptor desc = FSTableDescriptors.getTableDescriptor(fs, rootDir, tableName);
HTableDescriptor snapshotDesc = FSTableDescriptors.getTableDescriptor(fs, snapshotDir);
assertEquals(desc, snapshotDesc);
// check the region snapshot for all the regions
List<HRegionInfo> regions = admin.getTableRegions(tableName);
for (HRegionInfo info : regions) {
String regionName = info.getEncodedName();
Path regionDir = new Path(snapshotDir, regionName);
HRegionInfo snapshotRegionInfo = HRegion.loadDotRegionInfoFileContent(fs, regionDir);
assertEquals(info, snapshotRegionInfo);
// check to make sure we have the family
Path familyDir = new Path(regionDir, Bytes.toString(testFamily));
assertTrue("Expected to find: " + familyDir + ", but it doesn't exist", fs.exists(familyDir));
// make sure we have some files references
assertTrue(fs.listStatus(familyDir).length > 0);
}
}
/**
* Helper method for testing async snapshot operations. Just waits for the given snapshot to
* complete on the server by repeatedly checking the master.
* @param master running the snapshot
* @param snapshot to check
* @param sleep amount to sleep between checks to see if the snapshot is done
* @throws IOException if the snapshot fails
*/
public static void waitForSnapshotToComplete(HMaster master, HSnapshotDescription snapshot,
long sleep) throws IOException {
boolean done = false;
while (!done) {
done = master.isSnapshotDone(snapshot);
try {
Thread.sleep(sleep);
} catch (InterruptedException e) {
throw new IOException(e);
}
}
}
public static void cleanupSnapshot(HBaseAdmin admin, byte[] tableName) throws IOException {
SnapshotTestingUtils.cleanupSnapshot(admin, Bytes.toString(tableName));
}
public static void cleanupSnapshot(HBaseAdmin admin, String snapshotName) throws IOException {
// delete the taken snapshot
admin.deleteSnapshot(snapshotName);
assertNoSnapshots(admin);
}
/**
* Expect the snapshot to throw an error when checking if the snapshot is complete
* @param master master to check
* @param snapshot the {@link HSnapshotDescription} request to pass to the master
* @param clazz expected exception from the master
*/
public static void expectSnapshotDoneException(HMaster master, HSnapshotDescription snapshot,
Class<? extends HBaseSnapshotException> clazz) {
try {
boolean res = master.isSnapshotDone(snapshot);
Assert.fail("didn't fail to lookup a snapshot: res=" + res);
} catch (HBaseSnapshotException e) {
assertEquals("Threw wrong snapshot exception!", clazz, e.getClass());
} catch (Throwable t) {
Assert.fail("Threw an unexpected exception:" + t);
}
}
/**
* List all the HFiles in the given table
* @param fs FileSystem where the table lives
* @param tableDir directory of the table
* @return array of the current HFiles in the table (could be a zero-length array)
* @throws IOException on unexecpted error reading the FS
*/
public static FileStatus[] listHFiles(final FileSystem fs, Path tableDir) throws IOException {
// setup the filters we will need based on the filesystem
PathFilter regionFilter = new FSUtils.RegionDirFilter(fs);
PathFilter familyFilter = new FSUtils.FamilyDirFilter(fs);
final PathFilter fileFilter = new PathFilter() {
@Override
public boolean accept(Path file) {
try {
return fs.isFile(file);
} catch (IOException e) {
return false;
}
}
};
FileStatus[] regionDirs = FSUtils.listStatus(fs, tableDir, regionFilter);
// if no regions, then we are done
if (regionDirs == null || regionDirs.length == 0) return new FileStatus[0];
// go through each of the regions, and add al the hfiles under each family
List<FileStatus> regionFiles = new ArrayList<FileStatus>(regionDirs.length);
for (FileStatus regionDir : regionDirs) {
FileStatus[] fams = FSUtils.listStatus(fs, regionDir.getPath(), familyFilter);
// if no families, then we are done again
if (fams == null || fams.length == 0) continue;
// add all the hfiles under the family
regionFiles.addAll(SnapshotTestingUtils.getHFilesInRegion(fams, fs, fileFilter));
}
FileStatus[] files = new FileStatus[regionFiles.size()];
regionFiles.toArray(files);
return files;
}
/**
* Get all the hfiles in the region, under the passed set of families
* @param families all the family directories under the region
* @param fs filesystem where the families live
* @param fileFilter filter to only include files
* @return collection of all the hfiles under all the passed in families (non-null)
* @throws IOException on unexecpted error reading the FS
*/
public static Collection<FileStatus> getHFilesInRegion(FileStatus[] families, FileSystem fs,
PathFilter fileFilter) throws IOException {
Set<FileStatus> files = new TreeSet<FileStatus>();
for (FileStatus family : families) {
// get all the hfiles in the family
FileStatus[] hfiles = FSUtils.listStatus(fs, family.getPath(), fileFilter);
// if no hfiles, then we are done with this family
if (hfiles == null || hfiles.length == 0) continue;
files.addAll(Arrays.asList(hfiles));
}
return files;
}
// ==========================================================================
// Table Helpers
// ==========================================================================
public static void waitForTableToBeOnline(final HBaseTestingUtility util, final byte[] tableName)
throws IOException, InterruptedException {
HRegionServer rs = util.getRSForFirstRegionInTable(tableName);
List<HRegion> onlineRegions = rs.getOnlineRegions(tableName);
for (HRegion region : onlineRegions) {
region.waitForFlushesAndCompactions();
}
util.getHBaseAdmin().isTableAvailable(tableName);
}
public static void createTable(final HBaseTestingUtility util, final byte[] tableName,
final byte[]... families) throws IOException, InterruptedException {
HTableDescriptor htd = new HTableDescriptor(tableName);
for (byte[] family: families) {
HColumnDescriptor hcd = new HColumnDescriptor(family);
htd.addFamily(hcd);
}
byte[][] splitKeys = new byte[14][];
byte[] hex = Bytes.toBytes("123456789abcde");
for (int i = 0; i < splitKeys.length; ++i) {
splitKeys[i] = new byte[] { hex[i] };
}
util.getHBaseAdmin().createTable(htd, splitKeys);
waitForTableToBeOnline(util, tableName);
assertEquals(15, util.getHBaseAdmin().getTableRegions(tableName).size());
}
public static void loadData(final HBaseTestingUtility util, final byte[] tableName, int rows,
byte[]... families) throws IOException, InterruptedException {
loadData(util, new HTable(util.getConfiguration(), tableName), rows, families);
}
public static void loadData(final HBaseTestingUtility util, final HTable table, int rows,
byte[]... families) throws IOException, InterruptedException {
table.setAutoFlush(false);
// Ensure one row per region
assertTrue(rows >= 16);
for (byte k0: Bytes.toBytes("0123456789abcdef")) {
byte[] k = new byte[] { k0 };
byte[] value = Bytes.add(Bytes.toBytes(System.currentTimeMillis()), k);
byte[] key = Bytes.add(k, Bytes.toBytes(MD5Hash.getMD5AsHex(value)));
putData(table, families, key, value);
rows--;
}
// Add other extra rows. more rows, more files
while (rows-- > 0) {
byte[] value = Bytes.add(Bytes.toBytes(System.currentTimeMillis()), Bytes.toBytes(rows));
byte[] key = Bytes.toBytes(MD5Hash.getMD5AsHex(value));
putData(table, families, key, value);
}
table.flushCommits();
waitForTableToBeOnline(util, table.getTableName());
}
private static void putData(final HTable table, final byte[][] families,
final byte[] key, final byte[] value) throws IOException {
byte[] q = Bytes.toBytes("q");
Put put = new Put(key);
put.setDurability(Durability.SKIP_WAL);
for (byte[] family: families) {
put.add(family, q, value);
}
table.put(put);
}
public static void deleteAllSnapshots(final HBaseAdmin admin)
throws IOException {
// Delete all the snapshots
for (SnapshotDescription snapshot: admin.listSnapshots()) {
admin.deleteSnapshot(snapshot.getName());
}
SnapshotTestingUtils.assertNoSnapshots(admin);
}
public static void deleteArchiveDirectory(final HBaseTestingUtility util)
throws IOException {
// Ensure the archiver to be empty
MasterFileSystem mfs = util.getMiniHBaseCluster().getMaster().getMasterFileSystem();
Path archiveDir = new Path(mfs.getRootDir(), HConstants.HFILE_ARCHIVE_DIRECTORY);
mfs.getFileSystem().delete(archiveDir, true);
}
public static void verifyRowCount(final HBaseTestingUtility util, final byte[] tableName,
long expectedRows) throws IOException {
HTable table = new HTable(util.getConfiguration(), tableName);
try {
assertEquals(expectedRows, util.countRows(table));
} finally {
table.close();
}
}
}