| /** |
| * 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.avro.mapred; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.io.File; |
| import java.io.InputStream; |
| import java.io.FileInputStream; |
| import java.io.BufferedInputStream; |
| import java.io.PrintStream; |
| import java.util.Arrays; |
| import java.util.StringTokenizer; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.mapred.JobConf; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.util.Utf8; |
| import org.apache.avro.io.DatumReader; |
| import org.apache.avro.io.DatumWriter; |
| import org.apache.avro.generic.GenericDatumWriter; |
| import org.apache.avro.specific.SpecificDatumReader; |
| import org.apache.avro.file.DataFileWriter; |
| import org.apache.avro.file.DataFileStream; |
| |
| class WordCountUtil { |
| |
| private static final File DIR |
| = new File(System.getProperty("test.dir", ".") + "/mapred"); |
| private static final File LINES_FILE |
| = new File(new File(DIR, "in"), "lines.avro"); |
| private static final File LINES_TEXT_FILE |
| = new File(new File(DIR, "in"), "lines.txt"); |
| private static final File COUNTS_FILE |
| = new File(new File(DIR, "out"), "part-00000.avro"); |
| |
| public static final String[] LINES = new String[] { |
| "the quick brown fox jumps over the lazy dog", |
| "the cow jumps over the moon", |
| "the rain in spain falls mainly on the plains" |
| }; |
| |
| public static final Map<String,Long> COUNTS = |
| new TreeMap<String,Long>(); |
| static { |
| for (String line : LINES) { |
| StringTokenizer tokens = new StringTokenizer(line); |
| while (tokens.hasMoreTokens()) { |
| String word = tokens.nextToken(); |
| long count = COUNTS.containsKey(word) ? COUNTS.get(word) : 0L; |
| count++; |
| COUNTS.put(word, count); |
| } |
| } |
| } |
| |
| public static void writeLinesFile() throws IOException { |
| FileUtil.fullyDelete(DIR); |
| DatumWriter<Utf8> writer = new GenericDatumWriter<Utf8>(); |
| DataFileWriter<Utf8> out = new DataFileWriter<Utf8>(writer); |
| LINES_FILE.getParentFile().mkdirs(); |
| out.create(Schema.create(Schema.Type.STRING), LINES_FILE); |
| for (String line : LINES) |
| out.append(new Utf8(line)); |
| out.close(); |
| } |
| |
| public static void writeLinesTextFile() throws IOException { |
| FileUtil.fullyDelete(DIR); |
| LINES_FILE.getParentFile().mkdirs(); |
| PrintStream out = new PrintStream(LINES_TEXT_FILE); |
| for (String line : LINES) |
| out.println(line); |
| out.close(); |
| } |
| |
| public static void validateCountsFile() throws Exception { |
| DatumReader<Pair<Utf8,Long>> reader |
| = new SpecificDatumReader<Pair<Utf8,Long>>(); |
| InputStream in = new BufferedInputStream(new FileInputStream(COUNTS_FILE)); |
| DataFileStream<Pair<Utf8,Long>> counts |
| = new DataFileStream<Pair<Utf8,Long>>(in,reader); |
| int numWords = 0; |
| for (Pair<Utf8,Long> wc : counts) { |
| assertEquals(wc.key().toString(), |
| COUNTS.get(wc.key().toString()), wc.value()); |
| numWords++; |
| } |
| checkMeta(counts); |
| in.close(); |
| assertEquals(COUNTS.size(), numWords); |
| } |
| |
| // metadata tests |
| private static final String STRING_KEY = "string-key"; |
| private static final String LONG_KEY = "long-key"; |
| private static final String BYTES_KEY = "bytes-key"; |
| |
| private static final String STRING_META_VALUE = "value"; |
| private static final long LONG_META_VALUE = 666; |
| private static final byte[] BYTES_META_VALUE |
| = new byte[] {(byte)0x00, (byte)0x80, (byte)0xff}; |
| |
| public static void setMeta(JobConf job) { |
| AvroJob.setOutputMeta(job, STRING_KEY, STRING_META_VALUE); |
| AvroJob.setOutputMeta(job, LONG_KEY, LONG_META_VALUE); |
| AvroJob.setOutputMeta(job, BYTES_KEY, BYTES_META_VALUE); |
| } |
| |
| public static void checkMeta(DataFileStream<?> in) throws Exception { |
| assertEquals(STRING_META_VALUE, in.getMetaString(STRING_KEY)); |
| assertEquals(LONG_META_VALUE, in.getMetaLong(LONG_KEY)); |
| assertTrue(Arrays.equals(BYTES_META_VALUE, in.getMeta(BYTES_KEY))); |
| } |
| |
| } |