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 | package org.apache.hadoop.hdfs.server.namenode; |
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19 | |
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20 | import java.util.ArrayList; |
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21 | |
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22 | import org.apache.hadoop.hdfs.protocol.Block; |
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23 | import org.apache.hadoop.hdfs.server.common.GenerationStamp; |
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24 | import org.apache.hadoop.hdfs.server.protocol.BlockCommand; |
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25 | |
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26 | import junit.framework.TestCase; |
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27 | |
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28 | /** |
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29 | * This class tests that methods in DatanodeDescriptor |
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30 | */ |
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31 | public class TestDatanodeDescriptor extends TestCase { |
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32 | /** |
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33 | * Test that getInvalidateBlocks observes the maxlimit. |
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34 | */ |
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35 | public void testGetInvalidateBlocks() throws Exception { |
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36 | final int MAX_BLOCKS = 10; |
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37 | final int REMAINING_BLOCKS = 2; |
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38 | final int MAX_LIMIT = MAX_BLOCKS - REMAINING_BLOCKS; |
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39 | |
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40 | DatanodeDescriptor dd = new DatanodeDescriptor(); |
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41 | ArrayList<Block> blockList = new ArrayList<Block>(MAX_BLOCKS); |
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42 | for (int i=0; i<MAX_BLOCKS; i++) { |
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43 | blockList.add(new Block(i, 0, GenerationStamp.FIRST_VALID_STAMP)); |
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44 | } |
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45 | dd.addBlocksToBeInvalidated(blockList); |
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46 | BlockCommand bc = dd.getInvalidateBlocks(MAX_LIMIT); |
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47 | assertEquals(bc.getBlocks().length, MAX_LIMIT); |
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48 | bc = dd.getInvalidateBlocks(MAX_LIMIT); |
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49 | assertEquals(bc.getBlocks().length, REMAINING_BLOCKS); |
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50 | } |
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51 | } |
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