| /** |
| * 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.io; |
| |
| import java.io.*; |
| |
| |
| import org.apache.commons.logging.*; |
| import org.apache.hadoop.fs.*; |
| import org.apache.hadoop.io.SequenceFile.CompressionType; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.apache.hadoop.util.Progressable; |
| import org.apache.hadoop.conf.*; |
| import org.junit.Test; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.fail; |
| |
| /** Support for flat files of binary key/value pairs. */ |
| public class TestArrayFile { |
| private static final Log LOG = LogFactory.getLog(TestArrayFile.class); |
| |
| private static final Path TEST_DIR = new Path(GenericTestUtils.getTempPath( |
| TestMapFile.class.getSimpleName())); |
| private static String TEST_FILE = new Path(TEST_DIR, "test.array").toString(); |
| |
| @Test |
| public void testArrayFile() throws Exception { |
| Configuration conf = new Configuration(); |
| FileSystem fs = FileSystem.getLocal(conf); |
| RandomDatum[] data = generate(10000); |
| writeTest(fs, data, TEST_FILE); |
| readTest(fs, data, TEST_FILE, conf); |
| } |
| |
| @Test |
| public void testEmptyFile() throws Exception { |
| Configuration conf = new Configuration(); |
| FileSystem fs = FileSystem.getLocal(conf); |
| writeTest(fs, new RandomDatum[0], TEST_FILE); |
| ArrayFile.Reader reader = new ArrayFile.Reader(fs, TEST_FILE, conf); |
| assertNull(reader.get(0, new RandomDatum())); |
| reader.close(); |
| } |
| |
| private static RandomDatum[] generate(int count) { |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("generating " + count + " records in debug"); |
| } |
| RandomDatum[] data = new RandomDatum[count]; |
| RandomDatum.Generator generator = new RandomDatum.Generator(); |
| for (int i = 0; i < count; i++) { |
| generator.next(); |
| data[i] = generator.getValue(); |
| } |
| return data; |
| } |
| |
| private static void writeTest(FileSystem fs, RandomDatum[] data, String file) |
| throws IOException { |
| Configuration conf = new Configuration(); |
| MapFile.delete(fs, file); |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("creating with " + data.length + " debug"); |
| } |
| ArrayFile.Writer writer = new ArrayFile.Writer(conf, fs, file, RandomDatum.class); |
| writer.setIndexInterval(100); |
| for (int i = 0; i < data.length; i++) |
| writer.append(data[i]); |
| writer.close(); |
| } |
| |
| private static void readTest(FileSystem fs, RandomDatum[] data, String file, Configuration conf) |
| throws IOException { |
| RandomDatum v = new RandomDatum(); |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("reading " + data.length + " debug"); |
| } |
| ArrayFile.Reader reader = new ArrayFile.Reader(fs, file, conf); |
| try { |
| for (int i = 0; i < data.length; i++) { // try forwards |
| reader.get(i, v); |
| if (!v.equals(data[i])) { |
| throw new RuntimeException("wrong value at " + i); |
| } |
| } |
| for (int i = data.length-1; i >= 0; i--) { // then backwards |
| reader.get(i, v); |
| if (!v.equals(data[i])) { |
| throw new RuntimeException("wrong value at " + i); |
| } |
| } |
| if(LOG.isDebugEnabled()) { |
| LOG.debug("done reading " + data.length + " debug"); |
| } |
| } finally { |
| reader.close(); |
| } |
| } |
| |
| /** |
| * test on {@link ArrayFile.Reader} iteration methods |
| * <pre> |
| * {@code next(), seek()} in and out of range. |
| * </pre> |
| */ |
| @Test |
| public void testArrayFileIteration() { |
| int SIZE = 10; |
| Configuration conf = new Configuration(); |
| try { |
| FileSystem fs = FileSystem.get(conf); |
| ArrayFile.Writer writer = new ArrayFile.Writer(conf, fs, TEST_FILE, |
| LongWritable.class, CompressionType.RECORD, defaultProgressable); |
| assertNotNull("testArrayFileIteration error !!!", writer); |
| |
| for (int i = 0; i < SIZE; i++) |
| writer.append(new LongWritable(i)); |
| |
| writer.close(); |
| |
| ArrayFile.Reader reader = new ArrayFile.Reader(fs, TEST_FILE, conf); |
| LongWritable nextWritable = new LongWritable(0); |
| |
| for (int i = 0; i < SIZE; i++) { |
| nextWritable = (LongWritable)reader.next(nextWritable); |
| assertEquals(nextWritable.get(), i); |
| } |
| |
| assertTrue("testArrayFileIteration seek error !!!", |
| reader.seek(new LongWritable(6))); |
| nextWritable = (LongWritable) reader.next(nextWritable); |
| assertTrue("testArrayFileIteration error !!!", reader.key() == 7); |
| assertTrue("testArrayFileIteration error !!!", |
| nextWritable.equals(new LongWritable(7))); |
| assertFalse("testArrayFileIteration error !!!", |
| reader.seek(new LongWritable(SIZE + 5))); |
| reader.close(); |
| } catch (Exception ex) { |
| fail("testArrayFileWriterConstruction error !!!"); |
| } |
| } |
| |
| /** For debugging and testing. */ |
| public static void main(String[] args) throws Exception { |
| int count = 1024 * 1024; |
| boolean create = true; |
| boolean check = true; |
| String file = TEST_FILE; |
| String usage = "Usage: TestArrayFile [-count N] [-nocreate] [-nocheck] file"; |
| |
| if (args.length == 0) { |
| System.err.println(usage); |
| System.exit(-1); |
| } |
| |
| Configuration conf = new Configuration(); |
| int i = 0; |
| Path fpath = null; |
| FileSystem fs = null; |
| try { |
| for (; i < args.length; i++) { // parse command line |
| if (args[i] == null) { |
| continue; |
| } else if (args[i].equals("-count")) { |
| count = Integer.parseInt(args[++i]); |
| } else if (args[i].equals("-nocreate")) { |
| create = false; |
| } else if (args[i].equals("-nocheck")) { |
| check = false; |
| } else { |
| // file is required parameter |
| file = args[i]; |
| fpath=new Path(file); |
| } |
| } |
| |
| fs = fpath.getFileSystem(conf); |
| |
| LOG.info("count = " + count); |
| LOG.info("create = " + create); |
| LOG.info("check = " + check); |
| LOG.info("file = " + file); |
| |
| RandomDatum[] data = generate(count); |
| |
| if (create) { |
| writeTest(fs, data, file); |
| } |
| |
| if (check) { |
| readTest(fs, data, file, conf); |
| } |
| } finally { |
| fs.close(); |
| } |
| } |
| |
| private static final Progressable defaultProgressable = new Progressable() { |
| @Override |
| public void progress() { |
| } |
| }; |
| |
| } |