TestHost2NodesMap.java
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- /**
- * 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]));
- }
- }