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*
* 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
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package org.apache.hadoop.hbase.regionserver;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.SmallTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.MD5Hash;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@Category(SmallTests.class)
public class TestHRegionInfo {
@Test
public void testPb() throws DeserializationException {
HRegionInfo hri = HRegionInfo.FIRST_META_REGIONINFO;
byte [] bytes = hri.toByteArray();
HRegionInfo pbhri = HRegionInfo.parseFrom(bytes);
assertTrue(hri.equals(pbhri));
}
@Test
public void testReadAndWriteHRegionInfoFile() throws IOException, InterruptedException {
HBaseTestingUtility htu = new HBaseTestingUtility();
HRegionInfo hri = HRegionInfo.FIRST_META_REGIONINFO;
Path basedir = htu.getDataTestDir();
// Create a region. That'll write the .regioninfo file.
HRegion r = HRegion.createHRegion(hri, basedir, htu.getConfiguration(),
HTableDescriptor.META_TABLEDESC);
// Get modtime on the file.
long modtime = getModTime(r);
HRegion.closeHRegion(r);
Thread.sleep(1001);
r = HRegion.openHRegion(basedir, hri, HTableDescriptor.META_TABLEDESC,
null, htu.getConfiguration());
// Ensure the file is not written for a second time.
long modtime2 = getModTime(r);
assertEquals(modtime, modtime2);
// Now load the file.
HRegionInfo deserializedHri = HRegionFileSystem.loadRegionInfoFileContent(
r.getRegionFileSystem().getFileSystem(), r.getRegionFileSystem().getRegionDir());
assertTrue(hri.equals(deserializedHri));
}
long getModTime(final HRegion r) throws IOException {
FileStatus[] statuses = r.getRegionFileSystem().getFileSystem().listStatus(
new Path(r.getRegionFileSystem().getRegionDir(), HRegionFileSystem.REGION_INFO_FILE));
assertTrue(statuses != null && statuses.length == 1);
return statuses[0].getModificationTime();
}
@Test
public void testCreateHRegionInfoName() throws Exception {
String tableName = "tablename";
final byte [] tn = Bytes.toBytes(tableName);
String startKey = "startkey";
final byte [] sk = Bytes.toBytes(startKey);
String id = "id";
// old format region name
byte [] name = HRegionInfo.createRegionName(tn, sk, id, false);
String nameStr = Bytes.toString(name);
assertEquals(tableName + "," + startKey + "," + id, nameStr);
// new format region name.
String md5HashInHex = MD5Hash.getMD5AsHex(name);
assertEquals(HRegionInfo.MD5_HEX_LENGTH, md5HashInHex.length());
name = HRegionInfo.createRegionName(tn, sk, id, true);
nameStr = Bytes.toString(name);
assertEquals(tableName + "," + startKey + ","
+ id + "." + md5HashInHex + ".",
nameStr);
}
@Test
public void testContainsRange() {
HTableDescriptor tableDesc = new HTableDescriptor("testtable");
HRegionInfo hri = new HRegionInfo(
tableDesc.getName(), Bytes.toBytes("a"), Bytes.toBytes("g"));
// Single row range at start of region
assertTrue(hri.containsRange(Bytes.toBytes("a"), Bytes.toBytes("a")));
// Fully contained range
assertTrue(hri.containsRange(Bytes.toBytes("b"), Bytes.toBytes("c")));
// Range overlapping start of region
assertTrue(hri.containsRange(Bytes.toBytes("a"), Bytes.toBytes("c")));
// Fully contained single-row range
assertTrue(hri.containsRange(Bytes.toBytes("c"), Bytes.toBytes("c")));
// Range that overlaps end key and hence doesn't fit
assertFalse(hri.containsRange(Bytes.toBytes("a"), Bytes.toBytes("g")));
// Single row range on end key
assertFalse(hri.containsRange(Bytes.toBytes("g"), Bytes.toBytes("g")));
// Single row range entirely outside
assertFalse(hri.containsRange(Bytes.toBytes("z"), Bytes.toBytes("z")));
// Degenerate range
try {
hri.containsRange(Bytes.toBytes("z"), Bytes.toBytes("a"));
fail("Invalid range did not throw IAE");
} catch (IllegalArgumentException iae) {
}
}
@Test
public void testLastRegionCompare() {
HTableDescriptor tableDesc = new HTableDescriptor("testtable");
HRegionInfo hrip = new HRegionInfo(
tableDesc.getName(), Bytes.toBytes("a"), new byte[0]);
HRegionInfo hric = new HRegionInfo(
tableDesc.getName(), Bytes.toBytes("a"), Bytes.toBytes("b"));
assertTrue(hrip.compareTo(hric) > 0);
}
@Test
public void testMetaTables() {
assertTrue(HRegionInfo.FIRST_META_REGIONINFO.isMetaTable());
}
@Test
public void testComparator() {
byte[] tablename = Bytes.toBytes("comparatorTablename");
byte[] empty = new byte[0];
HRegionInfo older = new HRegionInfo(tablename, empty, empty, false, 0L);
HRegionInfo newer = new HRegionInfo(tablename, empty, empty, false, 1L);
assertTrue(older.compareTo(newer) < 0);
assertTrue(newer.compareTo(older) > 0);
assertTrue(older.compareTo(older) == 0);
assertTrue(newer.compareTo(newer) == 0);
}
}