| /** |
| * 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.hdfs.server.namenode; |
| |
| import org.apache.hadoop.hdfs.protocol.DatanodeID; |
| |
| import junit.framework.TestCase; |
| |
| public class TestHost2NodesMap extends TestCase { |
| static private Host2NodesMap map = new Host2NodesMap(); |
| private final static DatanodeDescriptor dataNodes[] = new DatanodeDescriptor[] { |
| new DatanodeDescriptor(new DatanodeID("h1:5020"), "/d1/r1"), |
| new DatanodeDescriptor(new DatanodeID("h2:5020"), "/d1/r1"), |
| new DatanodeDescriptor(new DatanodeID("h3:5020"), "/d1/r2"), |
| new DatanodeDescriptor(new DatanodeID("h3:5030"), "/d1/r2"), |
| }; |
| private final static DatanodeDescriptor NULL_NODE = null; |
| private final static DatanodeDescriptor NODE = |
| new DatanodeDescriptor(new DatanodeID("h3:5040"), "/d1/r4"); |
| |
| static { |
| for(DatanodeDescriptor node:dataNodes) { |
| map.add(node); |
| } |
| map.add(NULL_NODE); |
| } |
| |
| public void testContains() throws Exception { |
| for(int i=0; i<dataNodes.length; i++) { |
| assertTrue(map.contains(dataNodes[i])); |
| } |
| assertFalse(map.contains(NULL_NODE)); |
| assertFalse(map.contains(NODE)); |
| } |
| |
| public void testGetDatanodeByHost() throws Exception { |
| assertTrue(map.getDatanodeByHost("h1")==dataNodes[0]); |
| assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
| DatanodeDescriptor node = map.getDatanodeByHost("h3"); |
| assertTrue(node==dataNodes[2] || node==dataNodes[3]); |
| assertTrue(null==map.getDatanodeByHost("h4")); |
| } |
| |
| public void testGetDatanodeByName() throws Exception { |
| assertTrue(map.getDatanodeByName("h1:5020")==dataNodes[0]); |
| assertTrue(map.getDatanodeByName("h1:5030")==null); |
| assertTrue(map.getDatanodeByName("h2:5020")==dataNodes[1]); |
| assertTrue(map.getDatanodeByName("h2:5030")==null); |
| assertTrue(map.getDatanodeByName("h3:5020")==dataNodes[2]); |
| assertTrue(map.getDatanodeByName("h3:5030")==dataNodes[3]); |
| assertTrue(map.getDatanodeByName("h3:5040")==null); |
| assertTrue(map.getDatanodeByName("h4")==null); |
| assertTrue(map.getDatanodeByName(null)==null); |
| } |
| |
| public void testRemove() throws Exception { |
| assertFalse(map.remove(NODE)); |
| |
| assertTrue(map.remove(dataNodes[0])); |
| assertTrue(map.getDatanodeByHost("h1")==null); |
| assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
| DatanodeDescriptor node = map.getDatanodeByHost("h3"); |
| assertTrue(node==dataNodes[2] || node==dataNodes[3]); |
| assertTrue(null==map.getDatanodeByHost("h4")); |
| |
| assertTrue(map.remove(dataNodes[2])); |
| assertTrue(map.getDatanodeByHost("h1")==null); |
| assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
| assertTrue(map.getDatanodeByHost("h3")==dataNodes[3]); |
| |
| assertTrue(map.remove(dataNodes[3])); |
| assertTrue(map.getDatanodeByHost("h1")==null); |
| assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
| assertTrue(map.getDatanodeByHost("h3")==null); |
| |
| assertFalse(map.remove(NULL_NODE)); |
| assertTrue(map.remove(dataNodes[1])); |
| assertFalse(map.remove(dataNodes[1])); |
| } |
| |
| } |