TestDataNodeMetrics.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.datanode;
- import java.util.List;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.hdfs.DFSTestUtil;
- import org.apache.hadoop.hdfs.MiniDFSCluster;
- import org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeMetrics;
- import org.apache.hadoop.conf.Configuration;
- import junit.framework.TestCase;
- public class TestDataNodeMetrics extends TestCase {
-
- public void testDataNodeMetrics() throws Exception {
- Configuration conf = new Configuration();
- conf.setBoolean(SimulatedFSDataset.CONFIG_PROPERTY_SIMULATED, true);
- MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null);
- try {
- FileSystem fs = cluster.getFileSystem();
- final long LONG_FILE_LEN = Integer.MAX_VALUE+1L;
- DFSTestUtil.createFile(fs, new Path("/tmp.txt"),
- LONG_FILE_LEN, (short)1, 1L);
- List<DataNode> datanodes = cluster.getDataNodes();
- assertEquals(datanodes.size(), 1);
- DataNode datanode = datanodes.get(0);
- DataNodeMetrics metrics = datanode.getMetrics();
- assertEquals(LONG_FILE_LEN, metrics.bytesWritten.getCurrentIntervalValue());
- } finally {
- if (cluster != null) {cluster.shutdown();}
- }
- }
- }