/**
* 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.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocalFileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.SequenceFile.CompressionType;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.CompressionInputStream;
import org.apache.hadoop.io.compress.CompressionOutputStream;
import org.apache.hadoop.io.compress.Compressor;
import org.apache.hadoop.io.compress.Decompressor;
import org.apache.hadoop.util.Progressable;
import org.junit.Assert;
public class TestBloomMapFile extends TestCase {
private static Configuration conf = new Configuration();
private static final Path TEST_ROOT = new Path(
System.getProperty("test.build.data", "/tmp"),
TestMapFile.class.getSimpleName());
private static final Path TEST_DIR = new Path(TEST_ROOT, "testfile");
private static final Path TEST_FILE = new Path(TEST_ROOT, "testfile");
@Override
public void setUp() throws Exception {
LocalFileSystem fs = FileSystem.getLocal(conf);
if (fs.exists(TEST_ROOT) && !fs.delete(TEST_ROOT, true)) {
Assert.fail("Can't clean up test root dir");
}
fs.mkdirs(TEST_ROOT);
}
@SuppressWarnings("deprecation")
public void testMembershipTest() throws Exception {
// write the file
FileSystem fs = FileSystem.getLocal(conf);
Path qualifiedDirName = fs.makeQualified(TEST_DIR);
conf.setInt("io.mapfile.bloom.size", 2048);
BloomMapFile.Writer writer = new BloomMapFile.Writer(conf, fs,
qualifiedDirName.toString(), IntWritable.class, Text.class);
IntWritable key = new IntWritable();
Text value = new Text();
for (int i = 0; i < 2000; i += 2) {
key.set(i);
value.set("00" + i);
writer.append(key, value);
}
writer.close();
BloomMapFile.Reader reader = new BloomMapFile.Reader(fs,
qualifiedDirName.toString(), conf);
// check false positives rate
int falsePos = 0;
int falseNeg = 0;
for (int i = 0; i < 2000; i++) {
key.set(i);
boolean exists = reader.probablyHasKey(key);
if (i % 2 == 0) {
if (!exists)
falseNeg++;
} else {
if (exists)
falsePos++;
}
}
reader.close();
fs.delete(qualifiedDirName, true);
System.out.println("False negatives: " + falseNeg);
assertEquals(0, falseNeg);
System.out.println("False positives: " + falsePos);
assertTrue(falsePos < 2);
}
@SuppressWarnings("deprecation")
private void checkMembershipVaryingSizedKeys(String name, List<Text> keys)
throws Exception {
FileSystem fs = FileSystem.getLocal(conf);
Path qualifiedDirName = fs.makeQualified(TEST_DIR);
BloomMapFile.Writer writer = new BloomMapFile.Writer(conf, fs,
qualifiedDirName.toString(), Text.class, NullWritable.class);
for (Text key : keys) {
writer.append(key, NullWritable.get());
}
writer.close();
// will check for membership in the opposite order of how keys were inserted
BloomMapFile.Reader reader = new BloomMapFile.Reader(fs,
qualifiedDirName.toString(), conf);
Collections.reverse(keys);
for (Text key : keys) {
assertTrue("False negative for existing key " + key,
reader.probablyHasKey(key));
}
reader.close();
fs.delete(qualifiedDirName, true);
}
public void testMembershipVaryingSizedKeysTest1() throws Exception {
ArrayList<Text> list = new ArrayList<Text>();
list.add(new Text("A"));
list.add(new Text("BB"));
checkMembershipVaryingSizedKeys(getName(), list);
}
public void testMembershipVaryingSizedKeysTest2() throws Exception {
ArrayList<Text> list = new ArrayList<Text>();
list.add(new Text("AA"));
list.add(new Text("B"));
checkMembershipVaryingSizedKeys(getName(), list);
}
/**
* test {@code BloomMapFile.delete()} method
*/
public void testDeleteFile() {
try {
FileSystem fs = FileSystem.getLocal(conf);
BloomMapFile.Writer writer = new BloomMapFile.Writer(conf, TEST_FILE,
MapFile.Writer.keyClass(IntWritable.class),
MapFile.Writer.valueClass(Text.class));
assertNotNull("testDeleteFile error !!!", writer);
BloomMapFile.delete(fs, "." + TEST_FILE);
} catch (Exception ex) {
fail("unexpect ex in testDeleteFile !!!");
}
}
/**
* test {@link BloomMapFile.Reader} constructor with
* IOException
*/
public void testIOExceptionInWriterConstructor() {
Path dirNameSpy = org.mockito.Mockito.spy(TEST_FILE);
try {
BloomMapFile.Writer writer = new BloomMapFile.Writer(conf, TEST_FILE,
MapFile.Writer.keyClass(IntWritable.class),
MapFile.Writer.valueClass(Text.class));
writer.append(new IntWritable(1), new Text("123124142"));
writer.close();
org.mockito.Mockito.when(dirNameSpy.getFileSystem(conf)).thenThrow(
new IOException());
BloomMapFile.Reader reader = new BloomMapFile.Reader(dirNameSpy, conf,
MapFile.Reader.comparator(new WritableComparator(IntWritable.class)));
assertNull("testIOExceptionInWriterConstructor error !!!",
reader.getBloomFilter());
reader.close();
} catch (Exception ex) {
fail("unexpect ex in testIOExceptionInWriterConstructor !!!");
}
}
/**
* test {@link BloomMapFile.Reader.get()} method
*/
public void testGetBloomMapFile() {
int SIZE = 10;
try {
BloomMapFile.Writer writer = new BloomMapFile.Writer(conf, TEST_FILE,
MapFile.Writer.keyClass(IntWritable.class),
MapFile.Writer.valueClass(Text.class));
for (int i = 0; i < SIZE; i++) {
writer.append(new IntWritable(i), new Text());
}
writer.close();
BloomMapFile.Reader reader = new BloomMapFile.Reader(TEST_FILE, conf,
MapFile.Reader.comparator(new WritableComparator(IntWritable.class)));
for (int i = 0; i < SIZE; i++) {
assertNotNull("testGetBloomMapFile error !!!",
reader.get(new IntWritable(i), new Text()));
}
assertNull("testGetBloomMapFile error !!!",
reader.get(new IntWritable(SIZE + 5), new Text()));
reader.close();
} catch (Exception ex) {
fail("unexpect ex in testGetBloomMapFile !!!");
}
}
/**
* test {@code BloomMapFile.Writer} constructors
*/
@SuppressWarnings("deprecation")
public void testBloomMapFileConstructors() {
try {
FileSystem ts = FileSystem.get(conf);
String testFileName = TEST_FILE.toString();
BloomMapFile.Writer writer1 = new BloomMapFile.Writer(conf, ts,
testFileName, IntWritable.class, Text.class, CompressionType.BLOCK,
defaultCodec, defaultProgress);
assertNotNull("testBloomMapFileConstructors error !!!", writer1);
BloomMapFile.Writer writer2 = new BloomMapFile.Writer(conf, ts,
testFileName, IntWritable.class, Text.class, CompressionType.BLOCK,
defaultProgress);
assertNotNull("testBloomMapFileConstructors error !!!", writer2);
BloomMapFile.Writer writer3 = new BloomMapFile.Writer(conf, ts,
testFileName, IntWritable.class, Text.class, CompressionType.BLOCK);
assertNotNull("testBloomMapFileConstructors error !!!", writer3);
BloomMapFile.Writer writer4 = new BloomMapFile.Writer(conf, ts,
testFileName, IntWritable.class, Text.class, CompressionType.RECORD,
defaultCodec, defaultProgress);
assertNotNull("testBloomMapFileConstructors error !!!", writer4);
BloomMapFile.Writer writer5 = new BloomMapFile.Writer(conf, ts,
testFileName, IntWritable.class, Text.class, CompressionType.RECORD,
defaultProgress);
assertNotNull("testBloomMapFileConstructors error !!!", writer5);
BloomMapFile.Writer writer6 = new BloomMapFile.Writer(conf, ts,
testFileName, IntWritable.class, Text.class, CompressionType.RECORD);
assertNotNull("testBloomMapFileConstructors error !!!", writer6);
BloomMapFile.Writer writer7 = new BloomMapFile.Writer(conf, ts,
testFileName, WritableComparator.get(Text.class), Text.class);
assertNotNull("testBloomMapFileConstructors error !!!", writer7);
} catch (Exception ex) {
fail("testBloomMapFileConstructors error !!!");
}
}
static final Progressable defaultProgress = new Progressable() {
@Override
public void progress() {
}
};
static final CompressionCodec defaultCodec = new CompressionCodec() {
@Override
public String getDefaultExtension() {
return null;
}
@Override
public Class<? extends Decompressor> getDecompressorType() {
return null;
}
@Override
public Class<? extends Compressor> getCompressorType() {
return null;
}
@Override
public CompressionOutputStream createOutputStream(OutputStream out,
Compressor compressor) throws IOException {
return null;
}
@Override
public CompressionOutputStream createOutputStream(OutputStream out)
throws IOException {
return null;
}
@Override
public CompressionInputStream createInputStream(InputStream in,
Decompressor decompressor) throws IOException {
return null;
}
@Override
public CompressionInputStream createInputStream(InputStream in)
throws IOException {
return null;
}
@Override
public Decompressor createDecompressor() {
return null;
}
@Override
public Compressor createCompressor() {
return null;
}
};
}