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.datanode; |
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19 | |
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20 | import java.util.List; |
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21 | |
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22 | import org.apache.hadoop.fs.FileSystem; |
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23 | import org.apache.hadoop.fs.Path; |
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24 | import org.apache.hadoop.hdfs.DFSTestUtil; |
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25 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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26 | import org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeMetrics; |
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27 | import org.apache.hadoop.conf.Configuration; |
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28 | import junit.framework.TestCase; |
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29 | |
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30 | public class TestDataNodeMetrics extends TestCase { |
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31 | |
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32 | public void testDataNodeMetrics() throws Exception { |
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33 | Configuration conf = new Configuration(); |
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34 | conf.setBoolean(SimulatedFSDataset.CONFIG_PROPERTY_SIMULATED, true); |
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35 | MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null); |
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36 | try { |
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37 | FileSystem fs = cluster.getFileSystem(); |
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38 | final long LONG_FILE_LEN = Integer.MAX_VALUE+1L; |
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39 | DFSTestUtil.createFile(fs, new Path("/tmp.txt"), |
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40 | LONG_FILE_LEN, (short)1, 1L); |
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41 | List<DataNode> datanodes = cluster.getDataNodes(); |
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42 | assertEquals(datanodes.size(), 1); |
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43 | DataNode datanode = datanodes.get(0); |
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44 | DataNodeMetrics metrics = datanode.getMetrics(); |
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45 | assertEquals(LONG_FILE_LEN, metrics.bytesWritten.getCurrentIntervalValue()); |
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46 | } finally { |
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47 | if (cluster != null) {cluster.shutdown();} |
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48 | } |
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49 | } |
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50 | } |
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