/**
* 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.contrib.index.mapred;
import java.io.File;
import java.io.IOException;
import java.text.NumberFormat;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.contrib.index.lucene.FileSystemDirectory;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.KeepOnlyLastCommitDeletionPolicy;
import org.apache.lucene.index.MultiReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.store.Directory;
import junit.framework.TestCase;
public class TestIndexUpdater extends TestCase {
private static final NumberFormat NUMBER_FORMAT = NumberFormat.getInstance();
static {
NUMBER_FORMAT.setMinimumIntegerDigits(5);
NUMBER_FORMAT.setGroupingUsed(false);
}
// however, "we only allow 0 or 1 reducer in local mode" - from
// LocalJobRunner
private Configuration conf;
private Path localInputPath = new Path(System.getProperty("build.test") + "/sample/data.txt");
private Path inputPath = new Path("/myexample/data.txt");
private Path outputPath = new Path("/myoutput");
private Path indexPath = new Path("/myindex");
private int initNumShards = 3;
private int numMapTasks = 5;
private int numDataNodes = 3;
private int numTaskTrackers = 3;
private int numRuns = 3;
private int numDocsPerRun = 10; // num of docs in local input path
private FileSystem fs;
private MiniDFSCluster dfsCluster;
private MiniMRCluster mrCluster;
public TestIndexUpdater() throws IOException {
super();
if (System.getProperty("hadoop.log.dir") == null) {
String base = new File(".").getPath(); // getAbsolutePath();
System.setProperty("hadoop.log.dir", new Path(base).toString() + "/logs");
}
conf = new Configuration();
}
protected void setUp() throws Exception {
super.setUp();
try {
dfsCluster =
new MiniDFSCluster(conf, numDataNodes, true, (String[]) null);
fs = dfsCluster.getFileSystem();
if (fs.exists(inputPath)) {
fs.delete(inputPath);
}
fs.copyFromLocalFile(localInputPath, inputPath);
if (fs.exists(outputPath)) {
// do not create, mapred will create
fs.delete(outputPath);
}
if (fs.exists(indexPath)) {
fs.delete(indexPath);
}
mrCluster =
new MiniMRCluster(numTaskTrackers, fs.getUri().toString(), 1);
} catch (IOException e) {
if (dfsCluster != null) {
dfsCluster.shutdown();
dfsCluster = null;
}
if (fs != null) {
fs.close();
fs = null;
}
if (mrCluster != null) {
mrCluster.shutdown();
mrCluster = null;
}
throw e;
}
}
protected void tearDown() throws Exception {
if (dfsCluster != null) {
dfsCluster.shutdown();
dfsCluster = null;
}
if (fs != null) {
fs.close();
fs = null;
}
if (mrCluster != null) {
mrCluster.shutdown();
mrCluster = null;
}
super.tearDown();
}
public void testIndexUpdater() throws IOException {
IndexUpdateConfiguration iconf = new IndexUpdateConfiguration(conf);
// max field length, compound file and number of segments will be checked
// later
iconf.setIndexMaxFieldLength(2);
iconf.setIndexUseCompoundFile(true);
iconf.setIndexMaxNumSegments(1);
long versionNumber = -1;
long generation = -1;
for (int i = 0; i < numRuns; i++) {
if (fs.exists(outputPath)) {
fs.delete(outputPath);
}
Shard[] shards = new Shard[initNumShards + i];
for (int j = 0; j < shards.length; j++) {
shards[j] =
new Shard(versionNumber, new Path(indexPath,
NUMBER_FORMAT.format(j)).toString(), generation);
}
run(i + 1, shards);
}
}
private void run(int numRuns, Shard[] shards) throws IOException {
IIndexUpdater updater = new IndexUpdater();
updater.run(conf, new Path[] { inputPath }, outputPath, numMapTasks,
shards);
// verify the done files
Path[] doneFileNames = new Path[shards.length];
int count = 0;
FileStatus[] fileStatus = fs.listStatus(outputPath);
for (int i = 0; i < fileStatus.length; i++) {
FileStatus[] doneFiles = fs.listStatus(fileStatus[i].getPath());
for (int j = 0; j < doneFiles.length; j++) {
doneFileNames[count++] = doneFiles[j].getPath();
}
}
assertEquals(shards.length, count);
for (int i = 0; i < count; i++) {
assertTrue(doneFileNames[i].getName().startsWith(
IndexUpdateReducer.DONE.toString()));
}
// verify the index
IndexReader[] readers = new IndexReader[shards.length];
for (int i = 0; i < shards.length; i++) {
Directory dir =
new FileSystemDirectory(fs, new Path(shards[i].getDirectory()),
false, conf);
readers[i] = IndexReader.open(dir);
}
IndexReader reader = new MultiReader(readers);
IndexSearcher searcher = new IndexSearcher(reader);
Hits hits = searcher.search(new TermQuery(new Term("content", "apache")));
assertEquals(numRuns * numDocsPerRun, hits.length());
int[] counts = new int[numDocsPerRun];
for (int i = 0; i < hits.length(); i++) {
Document doc = hits.doc(i);
counts[Integer.parseInt(doc.get("id"))]++;
}
for (int i = 0; i < numDocsPerRun; i++) {
assertEquals(numRuns, counts[i]);
}
// max field length is 2, so "dot" is also indexed but not "org"
hits = searcher.search(new TermQuery(new Term("content", "dot")));
assertEquals(numRuns, hits.length());
hits = searcher.search(new TermQuery(new Term("content", "org")));
assertEquals(0, hits.length());
searcher.close();
reader.close();
// open and close an index writer with KeepOnlyLastCommitDeletionPolicy
// to remove earlier checkpoints
for (int i = 0; i < shards.length; i++) {
Directory dir =
new FileSystemDirectory(fs, new Path(shards[i].getDirectory()),
false, conf);
IndexWriter writer =
new IndexWriter(dir, false, null,
new KeepOnlyLastCommitDeletionPolicy());
writer.close();
}
// verify the number of segments, must be done after an writer with
// KeepOnlyLastCommitDeletionPolicy so that earlier checkpoints are removed
for (int i = 0; i < shards.length; i++) {
PathFilter cfsFilter = new PathFilter() {
public boolean accept(Path path) {
return path.getName().endsWith(".cfs");
}
};
FileStatus[] cfsFiles =
fs.listStatus(new Path(shards[i].getDirectory()), cfsFilter);
assertEquals(1, cfsFiles.length);
}
}
}