| /** |
| * 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.net; |
| |
| import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import com.google.common.base.Charsets; |
| import com.google.common.io.Files; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class TestTableMapping { |
| |
| private File mappingFile; |
| |
| @Before |
| public void setUp() throws IOException { |
| mappingFile = File.createTempFile(getClass().getSimpleName(), ".txt"); |
| Files.write("a.b.c /rack1\n" + |
| "1.2.3.4\t/rack2\n", mappingFile, Charsets.UTF_8); |
| mappingFile.deleteOnExit(); |
| } |
| |
| @Test |
| public void testResolve() throws IOException { |
| TableMapping mapping = new TableMapping(); |
| |
| Configuration conf = new Configuration(); |
| conf.set(NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY, mappingFile.getCanonicalPath()); |
| mapping.setConf(conf); |
| |
| List<String> names = new ArrayList<String>(); |
| names.add("a.b.c"); |
| names.add("1.2.3.4"); |
| |
| List<String> result = mapping.resolve(names); |
| assertEquals(names.size(), result.size()); |
| assertEquals("/rack1", result.get(0)); |
| assertEquals("/rack2", result.get(1)); |
| } |
| |
| @Test |
| public void testTableCaching() throws IOException { |
| TableMapping mapping = new TableMapping(); |
| |
| Configuration conf = new Configuration(); |
| conf.set(NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY, mappingFile.getCanonicalPath()); |
| mapping.setConf(conf); |
| |
| List<String> names = new ArrayList<String>(); |
| names.add("a.b.c"); |
| names.add("1.2.3.4"); |
| |
| List<String> result1 = mapping.resolve(names); |
| assertEquals(names.size(), result1.size()); |
| assertEquals("/rack1", result1.get(0)); |
| assertEquals("/rack2", result1.get(1)); |
| |
| // unset the file, see if it gets read again |
| conf.set(NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY, "some bad value for a file"); |
| |
| List<String> result2 = mapping.resolve(names); |
| assertEquals(result1, result2); |
| } |
| |
| @Test |
| public void testNoFile() { |
| TableMapping mapping = new TableMapping(); |
| |
| Configuration conf = new Configuration(); |
| mapping.setConf(conf); |
| |
| List<String> names = new ArrayList<String>(); |
| names.add("a.b.c"); |
| names.add("1.2.3.4"); |
| |
| List<String> result = mapping.resolve(names); |
| assertEquals(names.size(), result.size()); |
| assertEquals(NetworkTopology.DEFAULT_RACK, result.get(0)); |
| assertEquals(NetworkTopology.DEFAULT_RACK, result.get(1)); |
| } |
| |
| @Test |
| public void testFileDoesNotExist() { |
| TableMapping mapping = new TableMapping(); |
| |
| Configuration conf = new Configuration(); |
| conf.set(NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY, "/this/file/does/not/exist"); |
| mapping.setConf(conf); |
| |
| List<String> names = new ArrayList<String>(); |
| names.add("a.b.c"); |
| names.add("1.2.3.4"); |
| |
| List<String> result = mapping.resolve(names); |
| assertEquals(names.size(), result.size()); |
| assertEquals(result.get(0), NetworkTopology.DEFAULT_RACK); |
| assertEquals(result.get(1), NetworkTopology.DEFAULT_RACK); |
| } |
| |
| @Test |
| public void testBadFile() throws IOException { |
| Files.write("bad contents", mappingFile, Charsets.UTF_8); |
| |
| TableMapping mapping = new TableMapping(); |
| |
| Configuration conf = new Configuration(); |
| conf.set(NET_TOPOLOGY_TABLE_MAPPING_FILE_KEY, mappingFile.getCanonicalPath()); |
| mapping.setConf(conf); |
| |
| List<String> names = new ArrayList<String>(); |
| names.add("a.b.c"); |
| names.add("1.2.3.4"); |
| |
| List<String> result = mapping.resolve(names); |
| assertEquals(names.size(), result.size()); |
| assertEquals(result.get(0), NetworkTopology.DEFAULT_RACK); |
| assertEquals(result.get(1), NetworkTopology.DEFAULT_RACK); |
| } |
| |
| } |