/**
* Copyright 2007 The Apache Software Foundation
*
* 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.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.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
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.Test;
public class TestHRegionInfo {
@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 testGetSetOfHTD() throws IOException {
HBaseTestingUtility HTU = new HBaseTestingUtility();
final String tablename = "testGetSetOfHTD";
// Delete the temporary table directory that might still be there from the
// previous test run.
FSTableDescriptors.deleteTableDescriptorIfExists(tablename,
HTU.getConfiguration());
HTableDescriptor htd = new HTableDescriptor(tablename);
FSTableDescriptors.createTableDescriptor(htd, HTU.getConfiguration());
HRegionInfo hri = new HRegionInfo(Bytes.toBytes("testGetSetOfHTD"),
HConstants.EMPTY_START_ROW, HConstants.EMPTY_END_ROW);
HTableDescriptor htd2 = hri.getTableDesc();
assertTrue(htd.equals(htd2));
final String key = "SOME_KEY";
assertNull(htd.getValue(key));
final String value = "VALUE";
htd.setValue(key, value);
hri.setTableDesc(htd);
HTableDescriptor htd3 = hri.getTableDesc();
assertTrue(htd.equals(htd3));
}
@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.ROOT_REGIONINFO.isMetaTable());
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);
}
}