| /** |
| * 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.*; |
| import junit.framework.TestCase; |
| |
| import org.apache.hadoop.fs.*; |
| import org.apache.hadoop.io.*; |
| |
| import org.apache.hadoop.mapred.lib.*; |
| |
| public class TestMultipleTextOutputFormat extends TestCase { |
| private static JobConf defaultConf = new JobConf(); |
| |
| private static FileSystem localFs = null; |
| static { |
| try { |
| localFs = FileSystem.getLocal(defaultConf); |
| } catch (IOException e) { |
| throw new RuntimeException("init failure", e); |
| } |
| } |
| |
| // A random task attempt id for testing. |
| private static String attempt = "attempt_200707121733_0001_m_000000_0"; |
| |
| private static Path workDir = |
| new Path(new Path( |
| new Path(System.getProperty("test.build.data", "."), |
| "data"), |
| FileOutputCommitter.TEMP_DIR_NAME), "_" + attempt); |
| |
| private static void writeData(RecordWriter<Text, Text> rw) throws IOException { |
| for (int i = 10; i < 40; i++) { |
| String k = "" + i; |
| String v = "" + i; |
| rw.write(new Text(k), new Text(v)); |
| } |
| } |
| |
| static class KeyBasedMultipleTextOutputFormat extends MultipleTextOutputFormat<Text, Text> { |
| protected String generateFileNameForKeyValue(Text key, Text v, String name) { |
| |
| return key.toString().substring(0, 1) + "-" + name; |
| } |
| } |
| |
| private static void test1(JobConf job) throws IOException { |
| FileSystem fs = FileSystem.getLocal(job); |
| String name = "part-00000"; |
| KeyBasedMultipleTextOutputFormat theOutputFormat = new KeyBasedMultipleTextOutputFormat(); |
| RecordWriter<Text, Text> rw = theOutputFormat.getRecordWriter(fs, job, name, null); |
| writeData(rw); |
| rw.close(null); |
| } |
| |
| private static void test2(JobConf job) throws IOException { |
| FileSystem fs = FileSystem.getLocal(job); |
| String name = "part-00000"; |
| //pretend that we have input file with 1/2/3 as the suffix |
| job.set(JobContext.MAP_INPUT_FILE, "1/2/3"); |
| // we use the last two legs of the input file as the output file |
| job.set("mapred.outputformat.numOfTrailingLegs", "2"); |
| MultipleTextOutputFormat<Text, Text> theOutputFormat = new MultipleTextOutputFormat<Text, Text>(); |
| RecordWriter<Text, Text> rw = theOutputFormat.getRecordWriter(fs, job, name, null); |
| writeData(rw); |
| rw.close(null); |
| } |
| |
| public void testFormat() throws Exception { |
| JobConf job = new JobConf(); |
| job.set(JobContext.TASK_ATTEMPT_ID, attempt); |
| FileOutputFormat.setOutputPath(job, workDir.getParent().getParent()); |
| FileOutputFormat.setWorkOutputPath(job, workDir); |
| FileSystem fs = workDir.getFileSystem(job); |
| if (!fs.mkdirs(workDir)) { |
| fail("Failed to create output directory"); |
| } |
| //System.out.printf("workdir: %s\n", workDir.toString()); |
| TestMultipleTextOutputFormat.test1(job); |
| TestMultipleTextOutputFormat.test2(job); |
| String file_11 = "1-part-00000"; |
| |
| File expectedFile_11 = new File(new Path(workDir, file_11).toString()); |
| |
| //System.out.printf("expectedFile_11: %s\n", new Path(workDir, file_11).toString()); |
| StringBuffer expectedOutput = new StringBuffer(); |
| for (int i = 10; i < 20; i++) { |
| expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
| } |
| String output = UtilsForTests.slurp(expectedFile_11); |
| //System.out.printf("File_2 output: %s\n", output); |
| assertEquals(output, expectedOutput.toString()); |
| |
| String file_12 = "2-part-00000"; |
| |
| File expectedFile_12 = new File(new Path(workDir, file_12).toString()); |
| //System.out.printf("expectedFile_12: %s\n", new Path(workDir, file_12).toString()); |
| expectedOutput = new StringBuffer(); |
| for (int i = 20; i < 30; i++) { |
| expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
| } |
| output = UtilsForTests.slurp(expectedFile_12); |
| //System.out.printf("File_2 output: %s\n", output); |
| assertEquals(output, expectedOutput.toString()); |
| |
| String file_13 = "3-part-00000"; |
| |
| File expectedFile_13 = new File(new Path(workDir, file_13).toString()); |
| //System.out.printf("expectedFile_13: %s\n", new Path(workDir, file_13).toString()); |
| expectedOutput = new StringBuffer(); |
| for (int i = 30; i < 40; i++) { |
| expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
| } |
| output = UtilsForTests.slurp(expectedFile_13); |
| //System.out.printf("File_2 output: %s\n", output); |
| assertEquals(output, expectedOutput.toString()); |
| |
| String file_2 = "2/3"; |
| |
| File expectedFile_2 = new File(new Path(workDir, file_2).toString()); |
| //System.out.printf("expectedFile_2: %s\n", new Path(workDir, file_2).toString()); |
| expectedOutput = new StringBuffer(); |
| for (int i = 10; i < 40; i++) { |
| expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
| } |
| output = UtilsForTests.slurp(expectedFile_2); |
| //System.out.printf("File_2 output: %s\n", output); |
| assertEquals(output, expectedOutput.toString()); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new TestMultipleTextOutputFormat().testFormat(); |
| } |
| } |