TestSequenceFileAsBinaryInputFormat.java
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:3k
源码类别:
网格计算
开发平台:
Java
- /**
- * 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.mapred;
- import java.io.IOException;
- import java.util.Random;
- import org.apache.hadoop.fs.*;
- import org.apache.hadoop.io.*;
- import junit.framework.TestCase;
- import org.apache.commons.logging.*;
- public class TestSequenceFileAsBinaryInputFormat extends TestCase {
- private static final Log LOG = FileInputFormat.LOG;
- private static final int RECORDS = 10000;
- public void testBinary() throws IOException {
- JobConf job = new JobConf();
- FileSystem fs = FileSystem.getLocal(job);
- Path dir = new Path(System.getProperty("test.build.data",".") + "/mapred");
- Path file = new Path(dir, "testbinary.seq");
- Random r = new Random();
- long seed = r.nextLong();
- r.setSeed(seed);
- fs.delete(dir, true);
- FileInputFormat.setInputPaths(job, dir);
- Text tkey = new Text();
- Text tval = new Text();
- SequenceFile.Writer writer =
- new SequenceFile.Writer(fs, job, file, Text.class, Text.class);
- try {
- for (int i = 0; i < RECORDS; ++i) {
- tkey.set(Integer.toString(r.nextInt(), 36));
- tval.set(Long.toString(r.nextLong(), 36));
- writer.append(tkey, tval);
- }
- } finally {
- writer.close();
- }
- InputFormat<BytesWritable,BytesWritable> bformat =
- new SequenceFileAsBinaryInputFormat();
- int count = 0;
- r.setSeed(seed);
- BytesWritable bkey = new BytesWritable();
- BytesWritable bval = new BytesWritable();
- Text cmpkey = new Text();
- Text cmpval = new Text();
- DataInputBuffer buf = new DataInputBuffer();
- final int NUM_SPLITS = 3;
- FileInputFormat.setInputPaths(job, file);
- for (InputSplit split : bformat.getSplits(job, NUM_SPLITS)) {
- RecordReader<BytesWritable,BytesWritable> reader =
- bformat.getRecordReader(split, job, Reporter.NULL);
- try {
- while (reader.next(bkey, bval)) {
- tkey.set(Integer.toString(r.nextInt(), 36));
- tval.set(Long.toString(r.nextLong(), 36));
- buf.reset(bkey.getBytes(), bkey.getLength());
- cmpkey.readFields(buf);
- buf.reset(bval.getBytes(), bval.getLength());
- cmpval.readFields(buf);
- assertTrue(
- "Keys don't match: " + "*" + cmpkey.toString() + ":" +
- tkey.toString() + "*",
- cmpkey.toString().equals(tkey.toString()));
- assertTrue(
- "Vals don't match: " + "*" + cmpval.toString() + ":" +
- tval.toString() + "*",
- cmpval.toString().equals(tval.toString()));
- ++count;
- }
- } finally {
- reader.close();
- }
- }
- assertEquals("Some records not found", RECORDS, count);
- }
- }