[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.io; |
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| 20 | |
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| 21 | import java.io.*; |
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| 22 | import junit.framework.TestCase; |
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| 23 | |
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| 24 | import org.apache.commons.logging.*; |
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| 25 | |
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| 26 | import org.apache.hadoop.fs.*; |
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| 27 | import org.apache.hadoop.conf.*; |
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| 28 | |
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| 29 | /** Support for flat files of binary key/value pairs. */ |
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| 30 | public class TestArrayFile extends TestCase { |
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| 31 | private static final Log LOG = LogFactory.getLog(TestArrayFile.class); |
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| 32 | private static String FILE = |
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| 33 | System.getProperty("test.build.data",".") + "/test.array"; |
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| 34 | |
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| 35 | public TestArrayFile(String name) { |
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| 36 | super(name); |
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| 37 | } |
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| 38 | |
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| 39 | public void testArrayFile() throws Exception { |
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| 40 | Configuration conf = new Configuration(); |
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| 41 | FileSystem fs = FileSystem.getLocal(conf); |
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| 42 | RandomDatum[] data = generate(10000); |
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| 43 | writeTest(fs, data, FILE); |
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| 44 | readTest(fs, data, FILE, conf); |
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| 45 | } |
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| 46 | |
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| 47 | public void testEmptyFile() throws Exception { |
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| 48 | Configuration conf = new Configuration(); |
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| 49 | FileSystem fs = FileSystem.getLocal(conf); |
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| 50 | writeTest(fs, new RandomDatum[0], FILE); |
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| 51 | ArrayFile.Reader reader = new ArrayFile.Reader(fs, FILE, conf); |
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| 52 | assertNull(reader.get(0, new RandomDatum())); |
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| 53 | reader.close(); |
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| 54 | } |
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| 55 | |
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| 56 | private static RandomDatum[] generate(int count) { |
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| 57 | LOG.debug("generating " + count + " records in debug"); |
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| 58 | RandomDatum[] data = new RandomDatum[count]; |
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| 59 | RandomDatum.Generator generator = new RandomDatum.Generator(); |
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| 60 | for (int i = 0; i < count; i++) { |
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| 61 | generator.next(); |
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| 62 | data[i] = generator.getValue(); |
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| 63 | } |
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| 64 | return data; |
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| 65 | } |
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| 66 | |
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| 67 | private static void writeTest(FileSystem fs, RandomDatum[] data, String file) |
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| 68 | throws IOException { |
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| 69 | Configuration conf = new Configuration(); |
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| 70 | MapFile.delete(fs, file); |
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| 71 | LOG.debug("creating with " + data.length + " debug"); |
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| 72 | ArrayFile.Writer writer = new ArrayFile.Writer(conf, fs, file, RandomDatum.class); |
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| 73 | writer.setIndexInterval(100); |
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| 74 | for (int i = 0; i < data.length; i++) |
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| 75 | writer.append(data[i]); |
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| 76 | writer.close(); |
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| 77 | } |
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| 78 | |
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| 79 | private static void readTest(FileSystem fs, RandomDatum[] data, String file, Configuration conf) |
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| 80 | throws IOException { |
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| 81 | RandomDatum v = new RandomDatum(); |
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| 82 | LOG.debug("reading " + data.length + " debug"); |
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| 83 | ArrayFile.Reader reader = new ArrayFile.Reader(fs, file, conf); |
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| 84 | for (int i = 0; i < data.length; i++) { // try forwards |
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| 85 | reader.get(i, v); |
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| 86 | if (!v.equals(data[i])) { |
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| 87 | throw new RuntimeException("wrong value at " + i); |
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| 88 | } |
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| 89 | } |
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| 90 | for (int i = data.length-1; i >= 0; i--) { // then backwards |
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| 91 | reader.get(i, v); |
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| 92 | if (!v.equals(data[i])) { |
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| 93 | throw new RuntimeException("wrong value at " + i); |
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| 94 | } |
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| 95 | } |
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| 96 | reader.close(); |
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| 97 | LOG.debug("done reading " + data.length + " debug"); |
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| 98 | } |
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| 99 | |
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| 100 | |
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| 101 | /** For debugging and testing. */ |
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| 102 | public static void main(String[] args) throws Exception { |
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| 103 | int count = 1024 * 1024; |
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| 104 | boolean create = true; |
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| 105 | boolean check = true; |
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| 106 | String file = FILE; |
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| 107 | String usage = "Usage: TestArrayFile [-count N] [-nocreate] [-nocheck] file"; |
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| 108 | |
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| 109 | if (args.length == 0) { |
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| 110 | System.err.println(usage); |
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| 111 | System.exit(-1); |
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| 112 | } |
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| 113 | |
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| 114 | Configuration conf = new Configuration(); |
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| 115 | int i = 0; |
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| 116 | Path fpath = null; |
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| 117 | FileSystem fs = null; |
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| 118 | try { |
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| 119 | for (; i < args.length; i++) { // parse command line |
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| 120 | if (args[i] == null) { |
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| 121 | continue; |
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| 122 | } else if (args[i].equals("-count")) { |
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| 123 | count = Integer.parseInt(args[++i]); |
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| 124 | } else if (args[i].equals("-nocreate")) { |
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| 125 | create = false; |
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| 126 | } else if (args[i].equals("-nocheck")) { |
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| 127 | check = false; |
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| 128 | } else { |
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| 129 | // file is required parameter |
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| 130 | file = args[i]; |
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| 131 | fpath=new Path(file); |
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| 132 | } |
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| 133 | } |
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| 134 | |
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| 135 | fs = fpath.getFileSystem(conf); |
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| 136 | |
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| 137 | LOG.info("count = " + count); |
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| 138 | LOG.info("create = " + create); |
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| 139 | LOG.info("check = " + check); |
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| 140 | LOG.info("file = " + file); |
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| 141 | |
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| 142 | RandomDatum[] data = generate(count); |
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| 143 | |
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| 144 | if (create) { |
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| 145 | writeTest(fs, data, file); |
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| 146 | } |
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| 147 | |
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| 148 | if (check) { |
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| 149 | readTest(fs, data, file, conf); |
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| 150 | } |
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| 151 | } finally { |
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| 152 | fs.close(); |
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| 153 | } |
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| 154 | } |
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| 155 | } |
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