| /** |
| * 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.file.tfile; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.file.tfile.DTFile.Writer; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.*; |
| |
| public class TestTFileComparator2 { |
| private static final String ROOT = System.getProperty("test.build.data", |
| "target/tfile-test"); |
| private static final String name = "test-tfile-comparator2"; |
| private final static int BLOCK_SIZE = 512; |
| private static final String VALUE = "value"; |
| private static final String jClassLongWritableComparator = "jclass:" |
| + LongWritable.Comparator.class.getName(); |
| private static final long NENTRY = 10000; |
| |
| private static long cube(long n) { |
| return n*n*n; |
| } |
| |
| private static String buildValue(long i) { |
| return String.format("%s-%d", VALUE, i); |
| } |
| |
| @Test |
| public void testSortedLongWritable() throws IOException { |
| Configuration conf = new Configuration(); |
| Path path = new Path(ROOT, name); |
| FileSystem fs = path.getFileSystem(conf); |
| FSDataOutputStream out = fs.create(path); |
| try { |
| DTFile.Writer writer = new Writer(out, BLOCK_SIZE, "gz", |
| jClassLongWritableComparator, conf); |
| try { |
| LongWritable key = new LongWritable(0); |
| for (long i=0; i<NENTRY; ++i) { |
| key.set(cube(i-NENTRY/2)); |
| DataOutputStream dos = writer.prepareAppendKey(-1); |
| try { |
| key.write(dos); |
| } finally { |
| dos.close(); |
| } |
| dos = writer.prepareAppendValue(-1); |
| try { |
| dos.write(buildValue(i).getBytes()); |
| } finally { |
| dos.close(); |
| } |
| } |
| } finally { |
| writer.close(); |
| } |
| } finally { |
| out.close(); |
| } |
| |
| FSDataInputStream in = fs.open(path); |
| try { |
| DTFile.Reader reader = new DTFile.Reader(in, fs.getFileStatus(path) |
| .getLen(), conf); |
| try { |
| DTFile.Reader.Scanner scanner = reader.createScanner(); |
| long i=0; |
| BytesWritable value = new BytesWritable(); |
| for (; !scanner.atEnd(); scanner.advance()) { |
| scanner.entry().getValue(value); |
| assertEquals(buildValue(i), new String(value.getBytes(), 0, value |
| .getLength())); |
| ++i; |
| } |
| } finally { |
| reader.close(); |
| } |
| } finally { |
| in.close(); |
| } |
| } |
| } |