package org.apache.lucene.util;
/*
* 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.
*/
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.RandomAccessFile;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CodingErrorAction;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.zip.GZIPInputStream;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.document.SortedDocValuesField;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
/** Minimal port of benchmark's LneDocSource +
* DocMaker, so tests can enum docs from a line file created
* by benchmark's WriteLineDoc task */
public class LineFileDocs implements Closeable {
private BufferedReader reader;
private final static int BUFFER_SIZE = 1 << 16; // 64K
private final AtomicInteger id = new AtomicInteger();
private final String path;
private final boolean useDocValues;
/** If forever is true, we rewind the file at EOF (repeat
* the docs over and over) */
public LineFileDocs(Random random, String path, boolean useDocValues) throws IOException {
this.path = path;
this.useDocValues = useDocValues;
open(random);
}
public LineFileDocs(Random random) throws IOException {
this(random, LuceneTestCase.TEST_LINE_DOCS_FILE, true);
}
public LineFileDocs(Random random, boolean useDocValues) throws IOException {
this(random, LuceneTestCase.TEST_LINE_DOCS_FILE, useDocValues);
}
@Override
public synchronized void close() throws IOException {
if (reader != null) {
reader.close();
reader = null;
}
}
private long randomSeekPos(Random random, long size) {
if (random == null || size <= 3L)
return 0L;
return (random.nextLong()&Long.MAX_VALUE) % (size/3);
}
private synchronized void open(Random random) throws IOException {
InputStream is = getClass().getResourceAsStream(path);
boolean needSkip = true;
long size = 0L, seekTo = 0L;
if (is == null) {
// if its not in classpath, we load it as absolute filesystem path (e.g. Hudson's home dir)
File file = new File(path);
size = file.length();
if (path.endsWith(".gz")) {
// if it is a gzip file, we need to use InputStream and slowly skipTo:
is = new FileInputStream(file);
} else {
// optimized seek using RandomAccessFile:
seekTo = randomSeekPos(random, size);
final FileChannel channel = new RandomAccessFile(path, "r").getChannel();
if (LuceneTestCase.VERBOSE) {
System.out.println("TEST: LineFileDocs: file seek to fp=" + seekTo + " on open");
}
channel.position(seekTo);
is = Channels.newInputStream(channel);
needSkip = false;
}
} else {
// if the file comes from Classpath:
size = is.available();
}
if (path.endsWith(".gz")) {
is = new GZIPInputStream(is);
// guestimate:
size *= 2.8;
}
// If we only have an InputStream, we need to seek now,
// but this seek is a scan, so very inefficient!!!
if (needSkip) {
seekTo = randomSeekPos(random, size);
if (LuceneTestCase.VERBOSE) {
System.out.println("TEST: LineFileDocs: stream skip to fp=" + seekTo + " on open");
}
is.skip(seekTo);
}
// if we seeked somewhere, read until newline char
if (seekTo > 0L) {
int b;
do {
b = is.read();
} while (b >= 0 && b != 13 && b != 10);
}
CharsetDecoder decoder = IOUtils.CHARSET_UTF_8.newDecoder()
.onMalformedInput(CodingErrorAction.REPORT)
.onUnmappableCharacter(CodingErrorAction.REPORT);
reader = new BufferedReader(new InputStreamReader(is, decoder), BUFFER_SIZE);
if (seekTo > 0L) {
// read one more line, to make sure we are not inside a Windows linebreak (\r\n):
reader.readLine();
}
}
public synchronized void reset(Random random) throws IOException {
close();
open(random);
id.set(0);
}
private final static char SEP = '\t';
private static final class DocState {
final Document doc;
final Field titleTokenized;
final Field title;
final Field titleDV;
final Field body;
final Field id;
final Field date;
public DocState(boolean useDocValues) {
doc = new Document();
title = new StringField("title", "", Field.Store.NO);
doc.add(title);
FieldType ft = new FieldType(TextField.TYPE_STORED);
ft.setStoreTermVectors(true);
ft.setStoreTermVectorOffsets(true);
ft.setStoreTermVectorPositions(true);
titleTokenized = new Field("titleTokenized", "", ft);
doc.add(titleTokenized);
body = new Field("body", "", ft);
doc.add(body);
id = new StringField("docid", "", Field.Store.YES);
doc.add(id);
date = new StringField("date", "", Field.Store.YES);
doc.add(date);
if (useDocValues) {
titleDV = new SortedDocValuesField("titleDV", new BytesRef());
doc.add(titleDV);
} else {
titleDV = null;
}
}
}
private final ThreadLocal<DocState> threadDocs = new ThreadLocal<DocState>();
/** Note: Document instance is re-used per-thread */
public Document nextDoc() throws IOException {
String line;
synchronized(this) {
line = reader.readLine();
if (line == null) {
// Always rewind at end:
if (LuceneTestCase.VERBOSE) {
System.out.println("TEST: LineFileDocs: now rewind file...");
}
close();
open(null);
line = reader.readLine();
}
}
DocState docState = threadDocs.get();
if (docState == null) {
docState = new DocState(useDocValues);
threadDocs.set(docState);
}
int spot = line.indexOf(SEP);
if (spot == -1) {
throw new RuntimeException("line: [" + line + "] is in an invalid format !");
}
int spot2 = line.indexOf(SEP, 1 + spot);
if (spot2 == -1) {
throw new RuntimeException("line: [" + line + "] is in an invalid format !");
}
docState.body.setStringValue(line.substring(1+spot2, line.length()));
final String title = line.substring(0, spot);
docState.title.setStringValue(title);
if (docState.titleDV != null) {
docState.titleDV.setBytesValue(new BytesRef(title));
}
docState.titleTokenized.setStringValue(title);
docState.date.setStringValue(line.substring(1+spot, spot2));
docState.id.setStringValue(Integer.toString(id.getAndIncrement()));
return docState.doc;
}
}