[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.hdfs.server.namenode; |
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| 20 | |
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| 21 | import org.apache.hadoop.hdfs.protocol.DatanodeID; |
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| 22 | |
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| 23 | import junit.framework.TestCase; |
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| 24 | |
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| 25 | public class TestHost2NodesMap extends TestCase { |
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| 26 | static private Host2NodesMap map = new Host2NodesMap(); |
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| 27 | private final static DatanodeDescriptor dataNodes[] = new DatanodeDescriptor[] { |
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| 28 | new DatanodeDescriptor(new DatanodeID("h1:5020"), "/d1/r1"), |
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| 29 | new DatanodeDescriptor(new DatanodeID("h2:5020"), "/d1/r1"), |
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| 30 | new DatanodeDescriptor(new DatanodeID("h3:5020"), "/d1/r2"), |
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| 31 | new DatanodeDescriptor(new DatanodeID("h3:5030"), "/d1/r2"), |
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| 32 | }; |
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| 33 | private final static DatanodeDescriptor NULL_NODE = null; |
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| 34 | private final static DatanodeDescriptor NODE = |
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| 35 | new DatanodeDescriptor(new DatanodeID("h3:5040"), "/d1/r4"); |
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| 36 | |
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| 37 | static { |
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| 38 | for(DatanodeDescriptor node:dataNodes) { |
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| 39 | map.add(node); |
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| 40 | } |
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| 41 | map.add(NULL_NODE); |
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| 42 | } |
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| 43 | |
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| 44 | public void testContains() throws Exception { |
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| 45 | for(int i=0; i<dataNodes.length; i++) { |
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| 46 | assertTrue(map.contains(dataNodes[i])); |
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| 47 | } |
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| 48 | assertFalse(map.contains(NULL_NODE)); |
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| 49 | assertFalse(map.contains(NODE)); |
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| 50 | } |
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| 51 | |
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| 52 | public void testGetDatanodeByHost() throws Exception { |
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| 53 | assertTrue(map.getDatanodeByHost("h1")==dataNodes[0]); |
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| 54 | assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
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| 55 | DatanodeDescriptor node = map.getDatanodeByHost("h3"); |
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| 56 | assertTrue(node==dataNodes[2] || node==dataNodes[3]); |
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| 57 | assertTrue(null==map.getDatanodeByHost("h4")); |
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| 58 | } |
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| 59 | |
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| 60 | public void testGetDatanodeByName() throws Exception { |
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| 61 | assertTrue(map.getDatanodeByName("h1:5020")==dataNodes[0]); |
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| 62 | assertTrue(map.getDatanodeByName("h1:5030")==null); |
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| 63 | assertTrue(map.getDatanodeByName("h2:5020")==dataNodes[1]); |
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| 64 | assertTrue(map.getDatanodeByName("h2:5030")==null); |
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| 65 | assertTrue(map.getDatanodeByName("h3:5020")==dataNodes[2]); |
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| 66 | assertTrue(map.getDatanodeByName("h3:5030")==dataNodes[3]); |
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| 67 | assertTrue(map.getDatanodeByName("h3:5040")==null); |
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| 68 | assertTrue(map.getDatanodeByName("h4")==null); |
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| 69 | assertTrue(map.getDatanodeByName(null)==null); |
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| 70 | } |
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| 71 | |
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| 72 | public void testRemove() throws Exception { |
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| 73 | assertFalse(map.remove(NODE)); |
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| 74 | |
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| 75 | assertTrue(map.remove(dataNodes[0])); |
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| 76 | assertTrue(map.getDatanodeByHost("h1")==null); |
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| 77 | assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
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| 78 | DatanodeDescriptor node = map.getDatanodeByHost("h3"); |
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| 79 | assertTrue(node==dataNodes[2] || node==dataNodes[3]); |
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| 80 | assertTrue(null==map.getDatanodeByHost("h4")); |
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| 81 | |
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| 82 | assertTrue(map.remove(dataNodes[2])); |
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| 83 | assertTrue(map.getDatanodeByHost("h1")==null); |
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| 84 | assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
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| 85 | assertTrue(map.getDatanodeByHost("h3")==dataNodes[3]); |
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| 86 | |
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| 87 | assertTrue(map.remove(dataNodes[3])); |
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| 88 | assertTrue(map.getDatanodeByHost("h1")==null); |
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| 89 | assertTrue(map.getDatanodeByHost("h2")==dataNodes[1]); |
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| 90 | assertTrue(map.getDatanodeByHost("h3")==null); |
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| 91 | |
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| 92 | assertFalse(map.remove(NULL_NODE)); |
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| 93 | assertTrue(map.remove(dataNodes[1])); |
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| 94 | assertFalse(map.remove(dataNodes[1])); |
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| 95 | } |
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| 96 | |
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| 97 | } |
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