/**
* 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.util;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.ClusterStatus;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.RegionLoad;
import org.apache.hadoop.hbase.ServerLoad;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.RegionLocator;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.mockito.Mockito;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
@Category(SmallTests.class)
public class TestRegionSizeCalculator {
private Configuration configuration = new Configuration();
private final long megabyte = 1024L * 1024L;
@Test
public void testSimpleTestCase() throws Exception {
RegionLocator regionLocator = mockRegionLocator("region1", "region2", "region3");
Admin admin = mockAdmin(
mockServer(
mockRegion("region1", 123),
mockRegion("region3", 1232)
),
mockServer(
mockRegion("region2", 54321),
mockRegion("otherTableRegion", 110)
)
);
RegionSizeCalculator calculator = new RegionSizeCalculator(regionLocator, admin);
assertEquals(123 * megabyte, calculator.getRegionSize("region1".getBytes()));
assertEquals(54321 * megabyte, calculator.getRegionSize("region2".getBytes()));
assertEquals(1232 * megabyte, calculator.getRegionSize("region3".getBytes()));
// if region is not inside our table, it should return 0
assertEquals(0 * megabyte, calculator.getRegionSize("otherTableRegion".getBytes()));
assertEquals(3, calculator.getRegionSizeMap().size());
}
/**
* When size of region in megabytes is larger than largest possible integer there could be
* error caused by lost of precision.
* */
@Test
public void testLargeRegion() throws Exception {
RegionLocator regionLocator = mockRegionLocator("largeRegion");
Admin admin = mockAdmin(
mockServer(
mockRegion("largeRegion", Integer.MAX_VALUE)
)
);
RegionSizeCalculator calculator = new RegionSizeCalculator(regionLocator, admin);
assertEquals(((long) Integer.MAX_VALUE) * megabyte, calculator.getRegionSize("largeRegion".getBytes()));
}
/** When calculator is disabled, it should return 0 for each request.*/
@Test
public void testDisabled() throws Exception {
String regionName = "cz.goout:/index.html";
RegionLocator table = mockRegionLocator(regionName);
Admin admin = mockAdmin(
mockServer(
mockRegion(regionName, 999)
)
);
//first request on enabled calculator
RegionSizeCalculator calculator = new RegionSizeCalculator(table, admin);
assertEquals(999 * megabyte, calculator.getRegionSize(regionName.getBytes()));
//then disabled calculator.
configuration.setBoolean(RegionSizeCalculator.ENABLE_REGIONSIZECALCULATOR, false);
RegionSizeCalculator disabledCalculator = new RegionSizeCalculator(table, admin);
assertEquals(0 * megabyte, disabledCalculator.getRegionSize(regionName.getBytes()));
assertEquals(0, disabledCalculator.getRegionSizeMap().size());
}
/**
* Makes some table with given region names.
* */
private RegionLocator mockRegionLocator(String... regionNames) throws IOException {
RegionLocator mockedTable = Mockito.mock(RegionLocator.class);
when(mockedTable.getName()).thenReturn(TableName.valueOf("sizeTestTable"));
List<HRegionLocation> regionLocations = new ArrayList<>();
when(mockedTable.getAllRegionLocations()).thenReturn(regionLocations);
for (String regionName : regionNames) {
HRegionInfo info = Mockito.mock(HRegionInfo.class);
when(info.getRegionName()).thenReturn(regionName.getBytes());
regionLocations.add(new HRegionLocation(info, null));//we are not interested in values
}
return mockedTable;
}
/**
* Creates mock returning ClusterStatus info about given servers.
*/
private Admin mockAdmin(ServerLoad... servers) throws Exception {
//get clusterstatus
Admin mockAdmin = Mockito.mock(Admin.class);
ClusterStatus clusterStatus = mockCluster(servers);
when(mockAdmin.getConfiguration()).thenReturn(configuration);
when(mockAdmin.getClusterStatus()).thenReturn(clusterStatus);
return mockAdmin;
}
/**
* Creates mock of region with given name and size.
*
* @param fileSizeMb number of megabytes occupied by region in file store in megabytes
* */
private RegionLoad mockRegion(String regionName, int fileSizeMb) {
RegionLoad region = Mockito.mock(RegionLoad.class);
when(region.getName()).thenReturn(regionName.getBytes());
when(region.getNameAsString()).thenReturn(regionName);
when(region.getStorefileSizeMB()).thenReturn(fileSizeMb);
return region;
}
private ClusterStatus mockCluster(ServerLoad[] servers) {
List<ServerName> serverNames = new ArrayList<ServerName>();
ClusterStatus clusterStatus = Mockito.mock(ClusterStatus.class);
when(clusterStatus.getServers()).thenReturn(serverNames);
int serverCounter = 0;
for (ServerLoad server : servers) {
ServerName serverName = mock(ServerName.class);
when(serverName.getServerName()).thenReturn("server" + (serverCounter++));
serverNames.add(serverName);
when(clusterStatus.getLoad(serverName)).thenReturn(server);
}
return clusterStatus;
}
/** Creates mock of region server with given regions*/
private ServerLoad mockServer(RegionLoad... regions) {
ServerLoad serverLoad = Mockito.mock(ServerLoad.class);
Map<byte[], RegionLoad> regionMap = new TreeMap<byte[], RegionLoad>(Bytes.BYTES_COMPARATOR);
for (RegionLoad regionName : regions) {
regionMap.put(regionName.getName(), regionName);
}
when(serverLoad.getRegionsLoad()).thenReturn(regionMap);
return serverLoad;
}
}