| /* |
| * 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 |
| * |
| * https://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.trevni.avro; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.io.File; |
| import java.util.StringTokenizer; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| import org.apache.hadoop.fs.FileUtil; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.io.DatumWriter; |
| import org.apache.avro.generic.GenericDatumWriter; |
| import org.apache.avro.generic.GenericRecord; |
| import org.apache.avro.specific.SpecificData; |
| import org.apache.avro.file.DataFileWriter; |
| import org.apache.avro.mapred.Pair; |
| |
| public class WordCountUtil { |
| |
| public File dir; |
| public File linesFiles; |
| public File countFiles; |
| |
| public WordCountUtil(String testName) { |
| this(testName, "part-00000"); |
| } |
| |
| public WordCountUtil(String testName, String partDirName) { |
| dir = new File("target/wc", testName); |
| linesFiles = new File(new File(dir, "in"), "lines.avro"); |
| countFiles = new File(new File(dir, "out"), partDirName + "/part-0.trv"); |
| } |
| |
| 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<>(); |
| public static final long TOTAL; |
| static { |
| long total = 0; |
| for (String line : LINES) { |
| StringTokenizer tokens = new StringTokenizer(line); |
| while (tokens.hasMoreTokens()) { |
| String word = tokens.nextToken(); |
| long count = COUNTS.getOrDefault(word, 0L); |
| count++; |
| total++; |
| COUNTS.put(word, count); |
| } |
| } |
| TOTAL = total; |
| } |
| |
| public File getDir() { |
| return dir; |
| } |
| |
| public void writeLinesFile() throws IOException { |
| FileUtil.fullyDelete(dir); |
| DatumWriter<String> writer = new GenericDatumWriter<>(); |
| DataFileWriter<String> out = new DataFileWriter<>(writer); |
| linesFiles.getParentFile().mkdirs(); |
| out.create(Schema.create(Schema.Type.STRING), linesFiles); |
| for (String line : LINES) |
| out.append(line); |
| out.close(); |
| } |
| |
| public void validateCountsFile() throws Exception { |
| AvroColumnReader<Pair<String, Long>> reader = new AvroColumnReader<>( |
| new AvroColumnReader.Params(countFiles).setModel(SpecificData.get())); |
| int numWords = 0; |
| for (Pair<String, Long> wc : reader) { |
| assertEquals(wc.key(), COUNTS.get(wc.key()), wc.value()); |
| numWords++; |
| } |
| reader.close(); |
| assertEquals(COUNTS.size(), numWords); |
| } |
| |
| public void validateCountsFileGenericRecord() throws Exception { |
| AvroColumnReader<GenericRecord> reader = new AvroColumnReader<>( |
| new AvroColumnReader.Params(countFiles).setModel(SpecificData.get())); |
| int numWords = 0; |
| for (GenericRecord wc : reader) { |
| assertEquals((String) wc.get("key"), COUNTS.get(wc.get("key")), wc.get("value")); |
| // assertEquals(wc.getKey(), COUNTS.get(wc.getKey()), wc.getValue()); |
| numWords++; |
| } |
| reader.close(); |
| assertEquals(COUNTS.size(), numWords); |
| } |
| |
| } |