| /** |
| * 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.mapred; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.Writer; |
| |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.lib.IdentityMapper; |
| import org.apache.hadoop.mapred.lib.IdentityReducer; |
| |
| public class TestUserDefinedCounters extends TestCase { |
| |
| private static String TEST_ROOT_DIR = |
| new File(System.getProperty("test.build.data", "/tmp")).toURI() |
| .toString().replace(' ', '+'); |
| |
| private final Path INPUT_DIR = new Path(TEST_ROOT_DIR + "/input"); |
| private final Path OUTPUT_DIR = new Path(TEST_ROOT_DIR + "/out"); |
| private final Path INPUT_FILE = new Path(INPUT_DIR , "inp"); |
| |
| enum EnumCounter { MAP_RECORDS } |
| |
| static class CountingMapper<K, V> extends IdentityMapper<K, V> { |
| |
| public void map(K key, V value, |
| OutputCollector<K, V> output, Reporter reporter) |
| throws IOException { |
| output.collect(key, value); |
| reporter.incrCounter(EnumCounter.MAP_RECORDS, 1); |
| reporter.incrCounter("StringCounter", "MapRecords", 1); |
| } |
| |
| } |
| |
| private void cleanAndCreateInput(FileSystem fs) throws IOException { |
| fs.delete(INPUT_FILE, true); |
| fs.delete(OUTPUT_DIR, true); |
| |
| OutputStream os = fs.create(INPUT_FILE); |
| |
| Writer wr = new OutputStreamWriter(os); |
| wr.write("hello1\n"); |
| wr.write("hello2\n"); |
| wr.write("hello3\n"); |
| wr.write("hello4\n"); |
| wr.close(); |
| } |
| |
| public void testMapReduceJob() throws Exception { |
| |
| JobConf conf = new JobConf(TestUserDefinedCounters.class); |
| conf.setJobName("UserDefinedCounters"); |
| |
| FileSystem fs = FileSystem.get(conf); |
| cleanAndCreateInput(fs); |
| |
| conf.setInputFormat(TextInputFormat.class); |
| |
| conf.setMapOutputKeyClass(LongWritable.class); |
| conf.setMapOutputValueClass(Text.class); |
| |
| conf.setOutputFormat(TextOutputFormat.class); |
| conf.setOutputKeyClass(LongWritable.class); |
| conf.setOutputValueClass(Text.class); |
| |
| conf.setMapperClass(CountingMapper.class); |
| conf.setReducerClass(IdentityReducer.class); |
| |
| FileInputFormat.setInputPaths(conf, INPUT_DIR); |
| |
| FileOutputFormat.setOutputPath(conf, OUTPUT_DIR); |
| |
| RunningJob runningJob = JobClient.runJob(conf); |
| |
| Path[] outputFiles = FileUtil.stat2Paths( |
| fs.listStatus(OUTPUT_DIR, |
| new Utils.OutputFileUtils.OutputFilesFilter())); |
| if (outputFiles.length > 0) { |
| InputStream is = fs.open(outputFiles[0]); |
| BufferedReader reader = new BufferedReader(new InputStreamReader(is)); |
| String line = reader.readLine(); |
| int counter = 0; |
| while (line != null) { |
| counter++; |
| assertTrue(line.contains("hello")); |
| line = reader.readLine(); |
| } |
| reader.close(); |
| assertEquals(4, counter); |
| } |
| verifyCounters(runningJob, 4); |
| } |
| |
| public static void verifyCounters(RunningJob runningJob, int expected) |
| throws IOException { |
| assertEquals(expected, |
| runningJob.getCounters().getCounter(EnumCounter.MAP_RECORDS)); |
| assertEquals(expected, |
| runningJob.getCounters().getGroup("StringCounter") |
| .getCounter("MapRecords")); |
| } |
| |
| } |