package org.apache.lucene.index;
/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Field.Index;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.Field.TermVector;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.MockDirectoryWrapper;
import org.apache.lucene.store.AlreadyClosedException;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util._TestUtil;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.ThreadInterruptedException;
import java.util.concurrent.atomic.AtomicInteger;
public class TestIndexWriterReader extends LuceneTestCase {
static PrintStream infoStream;
private Random random;
@Override
public void setUp() throws Exception {
super.setUp();
random = newRandom();
}
public static int count(Term t, IndexReader r) throws IOException {
int count = 0;
DocsEnum td = MultiFields.getTermDocsEnum(r,
MultiFields.getDeletedDocs(r),
t.field(), new BytesRef(t.text()));
if (td != null) {
while (td.nextDoc() != DocsEnum.NO_MORE_DOCS) {
td.docID();
count++;
}
}
return count;
}
public void testUpdateDocument() throws Exception {
boolean optimize = true;
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
// create the index
createIndexNoClose(!optimize, "index1", writer);
// writer.flush(false, true, true);
// get a reader
IndexReader r1 = writer.getReader();
assertTrue(r1.isCurrent());
String id10 = r1.document(10).getField("id").stringValue();
Document newDoc = r1.document(10);
newDoc.removeField("id");
newDoc.add(new Field("id", Integer.toString(8000), Store.YES, Index.NOT_ANALYZED));
writer.updateDocument(new Term("id", id10), newDoc);
assertFalse(r1.isCurrent());
IndexReader r2 = writer.getReader();
assertTrue(r2.isCurrent());
assertEquals(0, count(new Term("id", id10), r2));
assertEquals(1, count(new Term("id", Integer.toString(8000)), r2));
r1.close();
writer.close();
assertTrue(r2.isCurrent());
IndexReader r3 = IndexReader.open(dir1, true);
assertTrue(r3.isCurrent());
assertTrue(r2.isCurrent());
assertEquals(0, count(new Term("id", id10), r3));
assertEquals(1, count(new Term("id", Integer.toString(8000)), r3));
writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
Document doc = new Document();
doc.add(new Field("field", "a b c", Field.Store.NO, Field.Index.ANALYZED));
writer.addDocument(doc);
assertTrue(r2.isCurrent());
assertTrue(r3.isCurrent());
writer.close();
assertFalse(r2.isCurrent());
assertTrue(!r3.isCurrent());
r2.close();
r3.close();
dir1.close();
}
/**
* Test using IW.addIndexes
*
* @throws Exception
*/
public void testAddIndexes() throws Exception {
boolean optimize = false;
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
// create the index
createIndexNoClose(!optimize, "index1", writer);
writer.flush(false, true, true);
// create a 2nd index
Directory dir2 = newDirectory(random);
IndexWriter writer2 = new IndexWriter(dir2, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer2.setInfoStream(infoStream);
createIndexNoClose(!optimize, "index2", writer2);
writer2.close();
IndexReader r0 = writer.getReader();
assertTrue(r0.isCurrent());
writer.addIndexes(new Directory[] { dir2 });
assertFalse(r0.isCurrent());
r0.close();
IndexReader r1 = writer.getReader();
assertTrue(r1.isCurrent());
writer.commit();
assertTrue(r1.isCurrent());
assertEquals(200, r1.maxDoc());
int index2df = r1.docFreq(new Term("indexname", "index2"));
assertEquals(100, index2df);
// verify the docs are from different indexes
Document doc5 = r1.document(5);
assertEquals("index1", doc5.get("indexname"));
Document doc150 = r1.document(150);
assertEquals("index2", doc150.get("indexname"));
r1.close();
writer.close();
dir1.close();
dir2.close();
}
public void testAddIndexes2() throws Exception {
boolean optimize = false;
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
// create a 2nd index
Directory dir2 = newDirectory(random);
IndexWriter writer2 = new IndexWriter(dir2, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer2.setInfoStream(infoStream);
createIndexNoClose(!optimize, "index2", writer2);
writer2.close();
writer.addIndexes(new Directory[] { dir2 });
writer.addIndexes(new Directory[] { dir2 });
writer.addIndexes(new Directory[] { dir2 });
writer.addIndexes(new Directory[] { dir2 });
writer.addIndexes(new Directory[] { dir2 });
IndexReader r1 = writer.getReader();
assertEquals(500, r1.maxDoc());
r1.close();
writer.close();
dir1.close();
dir2.close();
}
/**
* Deletes using IW.deleteDocuments
*
* @throws Exception
*/
public void testDeleteFromIndexWriter() throws Exception {
boolean optimize = true;
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()).setReaderTermsIndexDivisor(2));
writer.setInfoStream(infoStream);
// create the index
createIndexNoClose(!optimize, "index1", writer);
writer.flush(false, true, true);
// get a reader
IndexReader r1 = writer.getReader();
String id10 = r1.document(10).getField("id").stringValue();
// deleted IW docs should not show up in the next getReader
writer.deleteDocuments(new Term("id", id10));
IndexReader r2 = writer.getReader();
assertEquals(1, count(new Term("id", id10), r1));
assertEquals(0, count(new Term("id", id10), r2));
String id50 = r1.document(50).getField("id").stringValue();
assertEquals(1, count(new Term("id", id50), r1));
writer.deleteDocuments(new Term("id", id50));
IndexReader r3 = writer.getReader();
assertEquals(0, count(new Term("id", id10), r3));
assertEquals(0, count(new Term("id", id50), r3));
String id75 = r1.document(75).getField("id").stringValue();
writer.deleteDocuments(new TermQuery(new Term("id", id75)));
IndexReader r4 = writer.getReader();
assertEquals(1, count(new Term("id", id75), r3));
assertEquals(0, count(new Term("id", id75), r4));
r1.close();
r2.close();
r3.close();
r4.close();
writer.close();
// reopen the writer to verify the delete made it to the directory
writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
IndexReader w2r1 = writer.getReader();
assertEquals(0, count(new Term("id", id10), w2r1));
w2r1.close();
writer.close();
dir1.close();
}
public void testAddIndexesAndDoDeletesThreads() throws Throwable {
final int numIter = 2;
int numDirs = 3;
Directory mainDir = newDirectory(random);
IndexWriter mainWriter = new IndexWriter(mainDir, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
mainWriter.setInfoStream(infoStream);
AddDirectoriesThreads addDirThreads = new AddDirectoriesThreads(numIter, mainWriter);
addDirThreads.launchThreads(numDirs);
addDirThreads.joinThreads();
//assertEquals(100 + numDirs * (3 * numIter / 4) * addDirThreads.NUM_THREADS
// * addDirThreads.NUM_INIT_DOCS, addDirThreads.mainWriter.numDocs());
assertEquals(addDirThreads.count.intValue(), addDirThreads.mainWriter.numDocs());
addDirThreads.close(true);
assertTrue(addDirThreads.failures.size() == 0);
_TestUtil.checkIndex(mainDir);
IndexReader reader = IndexReader.open(mainDir, true);
assertEquals(addDirThreads.count.intValue(), reader.numDocs());
//assertEquals(100 + numDirs * (3 * numIter / 4) * addDirThreads.NUM_THREADS
// * addDirThreads.NUM_INIT_DOCS, reader.numDocs());
reader.close();
addDirThreads.closeDir();
mainDir.close();
}
private class AddDirectoriesThreads {
Directory addDir;
final static int NUM_THREADS = 5;
final static int NUM_INIT_DOCS = 100;
int numDirs;
final Thread[] threads = new Thread[NUM_THREADS];
IndexWriter mainWriter;
final List<Throwable> failures = new ArrayList<Throwable>();
IndexReader[] readers;
boolean didClose = false;
AtomicInteger count = new AtomicInteger(0);
AtomicInteger numaddIndexes = new AtomicInteger(0);
public AddDirectoriesThreads(int numDirs, IndexWriter mainWriter) throws Throwable {
this.numDirs = numDirs;
this.mainWriter = mainWriter;
addDir = newDirectory(random);
IndexWriter writer = new IndexWriter(addDir, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()).setMaxBufferedDocs(2));
for (int i = 0; i < NUM_INIT_DOCS; i++) {
Document doc = createDocument(i, "addindex", 4);
writer.addDocument(doc);
}
writer.close();
readers = new IndexReader[numDirs];
for (int i = 0; i < numDirs; i++)
readers[i] = IndexReader.open(addDir, false);
}
void joinThreads() {
for (int i = 0; i < NUM_THREADS; i++)
try {
threads[i].join();
} catch (InterruptedException ie) {
throw new ThreadInterruptedException(ie);
}
}
void close(boolean doWait) throws Throwable {
didClose = true;
mainWriter.close(doWait);
}
void closeDir() throws Throwable {
for (int i = 0; i < numDirs; i++)
readers[i].close();
addDir.close();
}
void handle(Throwable t) {
t.printStackTrace(System.out);
synchronized (failures) {
failures.add(t);
}
}
void launchThreads(final int numIter) {
for (int i = 0; i < NUM_THREADS; i++) {
threads[i] = new Thread() {
@Override
public void run() {
try {
final Directory[] dirs = new Directory[numDirs];
for (int k = 0; k < numDirs; k++)
dirs[k] = new MockDirectoryWrapper(new RAMDirectory(addDir));
//int j = 0;
//while (true) {
// System.out.println(Thread.currentThread().getName() + ": iter
// j=" + j);
for (int x=0; x < numIter; x++) {
// only do addIndexes
doBody(x, dirs);
}
//if (numIter > 0 && j == numIter)
// break;
//doBody(j++, dirs);
//doBody(5, dirs);
//}
} catch (Throwable t) {
handle(t);
}
}
};
}
for (int i = 0; i < NUM_THREADS; i++)
threads[i].start();
}
void doBody(int j, Directory[] dirs) throws Throwable {
switch (j % 4) {
case 0:
mainWriter.addIndexes(dirs);
mainWriter.optimize();
break;
case 1:
mainWriter.addIndexes(dirs);
numaddIndexes.incrementAndGet();
break;
case 2:
mainWriter.addIndexes(readers);
break;
case 3:
mainWriter.commit();
}
count.addAndGet(dirs.length*NUM_INIT_DOCS);
}
}
public void testIndexWriterReopenSegmentOptimize() throws Exception {
doTestIndexWriterReopenSegment(true);
}
public void testIndexWriterReopenSegment() throws Exception {
doTestIndexWriterReopenSegment(false);
}
/**
* Tests creating a segment, then check to insure the segment can be seen via
* IW.getReader
*/
public void doTestIndexWriterReopenSegment(boolean optimize) throws Exception {
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
IndexReader r1 = writer.getReader();
assertEquals(0, r1.maxDoc());
createIndexNoClose(false, "index1", writer);
writer.flush(!optimize, true, true);
IndexReader iwr1 = writer.getReader();
assertEquals(100, iwr1.maxDoc());
IndexReader r2 = writer.getReader();
assertEquals(r2.maxDoc(), 100);
// add 100 documents
for (int x = 10000; x < 10000 + 100; x++) {
Document d = createDocument(x, "index1", 5);
writer.addDocument(d);
}
writer.flush(false, true, true);
// verify the reader was reopened internally
IndexReader iwr2 = writer.getReader();
assertTrue(iwr2 != r1);
assertEquals(200, iwr2.maxDoc());
// should have flushed out a segment
IndexReader r3 = writer.getReader();
assertTrue(r2 != r3);
assertEquals(200, r3.maxDoc());
// dec ref the readers rather than close them because
// closing flushes changes to the writer
r1.close();
iwr1.close();
r2.close();
r3.close();
iwr2.close();
writer.close();
// test whether the changes made it to the directory
writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
IndexReader w2r1 = writer.getReader();
// insure the deletes were actually flushed to the directory
assertEquals(200, w2r1.maxDoc());
w2r1.close();
writer.close();
dir1.close();
}
public static Document createDocument(int n, String indexName, int numFields) {
StringBuilder sb = new StringBuilder();
Document doc = new Document();
doc.add(new Field("id", Integer.toString(n), Store.YES, Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
doc.add(new Field("indexname", indexName, Store.YES, Index.NOT_ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
sb.append("a");
sb.append(n);
doc.add(new Field("field1", sb.toString(), Store.YES, Index.ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
sb.append(" b");
sb.append(n);
for (int i = 1; i < numFields; i++) {
doc.add(new Field("field" + (i + 1), sb.toString(), Store.YES,
Index.ANALYZED, TermVector.WITH_POSITIONS_OFFSETS));
}
return doc;
}
/*
* Delete a document by term and return the doc id
*
* public static int deleteDocument(Term term, IndexWriter writer) throws
* IOException { IndexReader reader = writer.getReader(); TermDocs td =
* reader.termDocs(term); int doc = -1; //if (td.next()) { // doc = td.doc();
* //} //writer.deleteDocuments(term); td.close(); return doc; }
*/
public static void createIndex(Random random, Directory dir1, String indexName,
boolean multiSegment) throws IOException {
IndexWriter w = new IndexWriter(dir1, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setMergePolicy(new LogDocMergePolicy()));
for (int i = 0; i < 100; i++) {
w.addDocument(createDocument(i, indexName, 4));
if (multiSegment && (i % 10) == 0) {
}
}
if (!multiSegment) {
w.optimize();
}
w.close();
}
public static void createIndexNoClose(boolean multiSegment, String indexName,
IndexWriter w) throws IOException {
for (int i = 0; i < 100; i++) {
w.addDocument(createDocument(i, indexName, 4));
}
if (!multiSegment) {
w.optimize();
}
}
private static class MyWarmer extends IndexWriter.IndexReaderWarmer {
int warmCount;
@Override
public void warm(IndexReader reader) throws IOException {
warmCount++;
}
}
public void testMergeWarmer() throws Exception {
Directory dir1 = newDirectory(random);
// Enroll warmer
MyWarmer warmer = new MyWarmer();
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random,
TEST_VERSION_CURRENT, new MockAnalyzer())
.setMaxBufferedDocs(2).setMergedSegmentWarmer(warmer).setMergeScheduler(new ConcurrentMergeScheduler()));
writer.setInfoStream(infoStream);
// create the index
createIndexNoClose(false, "test", writer);
// get a reader to put writer into near real-time mode
IndexReader r1 = writer.getReader();
((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(2);
int num = 100 * RANDOM_MULTIPLIER;
for (int i = 0; i < num; i++) {
writer.addDocument(createDocument(i, "test", 4));
}
((ConcurrentMergeScheduler) writer.getConfig().getMergeScheduler()).sync();
assertTrue(warmer.warmCount > 0);
final int count = warmer.warmCount;
writer.addDocument(createDocument(17, "test", 4));
writer.optimize();
assertTrue(warmer.warmCount > count);
writer.close();
r1.close();
dir1.close();
}
public void testAfterCommit() throws Exception {
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()).setMergeScheduler(new ConcurrentMergeScheduler()));
writer.commit();
writer.setInfoStream(infoStream);
// create the index
createIndexNoClose(false, "test", writer);
// get a reader to put writer into near real-time mode
IndexReader r1 = writer.getReader();
_TestUtil.checkIndex(dir1);
writer.commit();
_TestUtil.checkIndex(dir1);
assertEquals(100, r1.numDocs());
for (int i = 0; i < 10; i++) {
writer.addDocument(createDocument(i, "test", 4));
}
((ConcurrentMergeScheduler) writer.getConfig().getMergeScheduler()).sync();
IndexReader r2 = r1.reopen();
if (r2 != r1) {
r1.close();
r1 = r2;
}
assertEquals(110, r1.numDocs());
writer.close();
r1.close();
dir1.close();
}
// Make sure reader remains usable even if IndexWriter closes
public void testAfterClose() throws Exception {
Directory dir1 = newDirectory(random);
IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
// create the index
createIndexNoClose(false, "test", writer);
IndexReader r = writer.getReader();
writer.close();
_TestUtil.checkIndex(dir1);
// reader should remain usable even after IndexWriter is closed:
assertEquals(100, r.numDocs());
Query q = new TermQuery(new Term("indexname", "test"));
assertEquals(100, new IndexSearcher(r).search(q, 10).totalHits);
try {
r.reopen();
fail("failed to hit AlreadyClosedException");
} catch (AlreadyClosedException ace) {
// expected
}
r.close();
dir1.close();
}
// Stress test reopen during addIndexes
public void testDuringAddIndexes() throws Exception {
Directory dir1 = newDirectory(random);
final IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(2);
// create the index
createIndexNoClose(false, "test", writer);
writer.commit();
final Directory[] dirs = new Directory[10];
for (int i=0;i<10;i++) {
dirs[i] = new MockDirectoryWrapper(new RAMDirectory(dir1));
}
IndexReader r = writer.getReader();
final int NUM_THREAD = 5;
final float SECONDS = 0.5f;
final long endTime = (long) (System.currentTimeMillis() + 1000.*SECONDS);
final List<Throwable> excs = Collections.synchronizedList(new ArrayList<Throwable>());
final Thread[] threads = new Thread[NUM_THREAD];
for(int i=0;i<NUM_THREAD;i++) {
threads[i] = new Thread() {
@Override
public void run() {
do {
try {
writer.addIndexes(dirs);
writer.maybeMerge();
} catch (Throwable t) {
excs.add(t);
throw new RuntimeException(t);
}
} while(System.currentTimeMillis() < endTime);
}
};
threads[i].setDaemon(true);
threads[i].start();
}
int lastCount = 0;
while(System.currentTimeMillis() < endTime) {
IndexReader r2 = r.reopen();
if (r2 != r) {
r.close();
r = r2;
}
Query q = new TermQuery(new Term("indexname", "test"));
final int count = new IndexSearcher(r).search(q, 10).totalHits;
assertTrue(count >= lastCount);
lastCount = count;
}
for(int i=0;i<NUM_THREAD;i++) {
threads[i].join();
}
// final check
IndexReader r2 = r.reopen();
if (r2 != r) {
r.close();
r = r2;
}
Query q = new TermQuery(new Term("indexname", "test"));
final int count = new IndexSearcher(r).search(q, 10).totalHits;
assertTrue(count >= lastCount);
assertEquals(0, excs.size());
writer.close();
_TestUtil.checkIndex(dir1);
r.close();
dir1.close();
}
// Stress test reopen during add/delete
public void testDuringAddDelete() throws Exception {
Directory dir1 = newDirectory(random);
final IndexWriter writer = new IndexWriter(dir1, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
writer.setInfoStream(infoStream);
((LogMergePolicy) writer.getConfig().getMergePolicy()).setMergeFactor(2);
// create the index
createIndexNoClose(false, "test", writer);
writer.commit();
IndexReader r = writer.getReader();
final int NUM_THREAD = 5;
final float SECONDS = 0.5f;
final long endTime = (long) (System.currentTimeMillis() + 1000.*SECONDS);
final List<Throwable> excs = Collections.synchronizedList(new ArrayList<Throwable>());
final Thread[] threads = new Thread[NUM_THREAD];
for(int i=0;i<NUM_THREAD;i++) {
threads[i] = new Thread() {
@Override
public void run() {
int count = 0;
final Random r = new Random();
do {
try {
for(int i=0;i<10;i++) {
writer.addDocument(createDocument(10*count+i, "test", 4));
}
count++;
final int limit = count*10;
for(int i=0;i<5;i++) {
int x = r.nextInt(limit);
writer.deleteDocuments(new Term("field3", "b"+x));
}
} catch (Throwable t) {
excs.add(t);
throw new RuntimeException(t);
}
} while(System.currentTimeMillis() < endTime);
}
};
threads[i].setDaemon(true);
threads[i].start();
}
int sum = 0;
while(System.currentTimeMillis() < endTime) {
IndexReader r2 = r.reopen();
if (r2 != r) {
r.close();
r = r2;
}
Query q = new TermQuery(new Term("indexname", "test"));
sum += new IndexSearcher(r).search(q, 10).totalHits;
}
for(int i=0;i<NUM_THREAD;i++) {
threads[i].join();
}
// at least search once
IndexReader r2 = r.reopen();
if (r2 != r) {
r.close();
r = r2;
}
Query q = new TermQuery(new Term("indexname", "test"));
sum += new IndexSearcher(r).search(q, 10).totalHits;
assertTrue("no documents found at all", sum > 0);
assertEquals(0, excs.size());
writer.close();
_TestUtil.checkIndex(dir1);
r.close();
dir1.close();
}
public void testExpungeDeletes() throws Throwable {
Directory dir = newDirectory(random);
final IndexWriter w = new IndexWriter(dir, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
Document doc = new Document();
doc.add(new Field("field", "a b c", Field.Store.NO, Field.Index.ANALYZED));
Field id = new Field("id", "", Field.Store.NO, Field.Index.NOT_ANALYZED);
doc.add(id);
id.setValue("0");
w.addDocument(doc);
id.setValue("1");
w.addDocument(doc);
w.deleteDocuments(new Term("id", "0"));
IndexReader r = w.getReader();
w.expungeDeletes();
w.close();
r.close();
r = IndexReader.open(dir, true);
assertEquals(1, r.numDocs());
assertFalse(r.hasDeletions());
r.close();
dir.close();
}
public void testDeletesNumDocs() throws Throwable {
Directory dir = newDirectory(random);
final IndexWriter w = new IndexWriter(dir, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
Document doc = new Document();
doc.add(new Field("field", "a b c", Field.Store.NO, Field.Index.ANALYZED));
Field id = new Field("id", "", Field.Store.NO, Field.Index.NOT_ANALYZED);
doc.add(id);
id.setValue("0");
w.addDocument(doc);
id.setValue("1");
w.addDocument(doc);
IndexReader r = w.getReader();
assertEquals(2, r.numDocs());
r.close();
w.deleteDocuments(new Term("id", "0"));
r = w.getReader();
assertEquals(1, r.numDocs());
r.close();
w.deleteDocuments(new Term("id", "1"));
r = w.getReader();
assertEquals(0, r.numDocs());
r.close();
w.close();
dir.close();
}
public void testEmptyIndex() throws Exception {
// Ensures that getReader works on an empty index, which hasn't been committed yet.
Directory dir = newDirectory(random);
IndexWriter w = new IndexWriter(dir, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer()));
IndexReader r = w.getReader();
assertEquals(0, r.numDocs());
r.close();
w.close();
dir.close();
}
public void testSegmentWarmer() throws Exception {
Directory dir = newDirectory(random);
IndexWriter w = new IndexWriter(dir, newIndexWriterConfig(random, TEST_VERSION_CURRENT, new MockAnalyzer())
.setMaxBufferedDocs(2).setReaderPooling(true));
((LogMergePolicy) w.getMergePolicy()).setMergeFactor(10);
w.setMergedSegmentWarmer(new IndexWriter.IndexReaderWarmer() {
public void warm(IndexReader r) throws IOException {
final IndexSearcher s = new IndexSearcher(r);
final TopDocs hits = s.search(new TermQuery(new Term("foo", "bar")), 10);
assertEquals(20, hits.totalHits);
}
});
Document doc = new Document();
doc.add(new Field("foo", "bar", Field.Store.YES, Field.Index.NOT_ANALYZED));
for(int i=0;i<20;i++) {
w.addDocument(doc);
}
w.waitForMerges();
w.close();
dir.close();
}
}