/**
* 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.metrics;
import java.io.IOException;
import java.util.Random;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
/**
* Test case for FilesInGetListingOps metric in Namenode
*/
public class TestNNMetricFilesInGetListingOps extends TestCase {
private static final Configuration CONF = new Configuration();
static {
CONF.setLong("dfs.block.size", 100);
CONF.setInt("io.bytes.per.checksum", 1);
CONF.setLong("dfs.heartbeat.interval", 1L);
CONF.setInt("dfs.replication.interval", 1);
}
private MiniDFSCluster cluster;
private NameNodeMetrics nnMetrics;
private DistributedFileSystem fs;
private Random rand = new Random();
@Override
protected void setUp() throws Exception {
cluster = new MiniDFSCluster(CONF, 1, true, null);
cluster.waitActive();
cluster.getNameNode();
nnMetrics = NameNode.getNameNodeMetrics();
fs = (DistributedFileSystem) cluster.getFileSystem();
}
@Override
protected void tearDown() throws Exception {
cluster.shutdown();
}
/** create a file with a length of <code>fileLen</code> */
private void createFile(String fileName, long fileLen, short replicas) throws IOException {
Path filePath = new Path(fileName);
DFSTestUtil.createFile(fs, filePath, fileLen, replicas, rand.nextLong());
}
public void testFilesInGetListingOps() throws Exception {
createFile("/tmp1/t1", 3200, (short)3);
createFile("/tmp1/t2", 3200, (short)3);
createFile("/tmp2/t1", 3200, (short)3);
createFile("/tmp2/t2", 3200, (short)3);
cluster.getNameNode().getListing("/tmp1", HdfsFileStatus.EMPTY_NAME) ;
assertEquals(2,nnMetrics.numFilesInGetListingOps.getCurrentIntervalValue());
cluster.getNameNode().getListing("/tmp2", HdfsFileStatus.EMPTY_NAME) ;
assertEquals(4,nnMetrics.numFilesInGetListingOps.getCurrentIntervalValue());
// test non-existent path
cluster.getNameNode().getListing("/tmp", HdfsFileStatus.EMPTY_NAME) ;
assertEquals(4,nnMetrics.numFilesInGetListingOps.getCurrentIntervalValue());
// test listing a file
cluster.getNameNode().getListing("/tmp1/t1", HdfsFileStatus.EMPTY_NAME) ;
assertEquals(5,nnMetrics.numFilesInGetListingOps.getCurrentIntervalValue());
}
}