package org.apache.lucene.index;
/*
* 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.*;
import java.util.*;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.codecs.Codec;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IndexInput;
import org.apache.lucene.store.IndexOutput;
import org.apache.lucene.store.MockDirectoryWrapper;
import org.apache.lucene.util.LuceneTestCase;
/*
Verify we can read the pre-2.1 file format, do searches
against it, and add documents to it.
*/
public class TestIndexFileDeleter extends LuceneTestCase {
public void testDeleteLeftoverFiles() throws IOException {
Directory dir = newDirectory();
if (dir instanceof MockDirectoryWrapper) {
((MockDirectoryWrapper)dir).setPreventDoubleWrite(false);
}
MergePolicy mergePolicy = newLogMergePolicy(true, 10);
// This test expects all of its segments to be in CFS
mergePolicy.setNoCFSRatio(1.0);
mergePolicy.setMaxCFSSegmentSizeMB(Double.POSITIVE_INFINITY);
IndexWriter writer = new IndexWriter(
dir,
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())).
setMaxBufferedDocs(10).
setMergePolicy(mergePolicy).setUseCompoundFile(true)
);
int i;
for(i=0;i<35;i++) {
addDoc(writer, i);
}
writer.getConfig().getMergePolicy().setNoCFSRatio(0.0);
writer.getConfig().setUseCompoundFile(false);
for(;i<45;i++) {
addDoc(writer, i);
}
writer.close();
// Delete one doc so we get a .del file:
writer = new IndexWriter(
dir,
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())).
setMergePolicy(NoMergePolicy.NO_COMPOUND_FILES).setUseCompoundFile(true)
);
Term searchTerm = new Term("id", "7");
writer.deleteDocuments(searchTerm);
writer.close();
// Now, artificially create an extra .del file & extra
// .s0 file:
String[] files = dir.listAll();
/*
for(int j=0;j<files.length;j++) {
System.out.println(j + ": " + files[j]);
}
*/
// TODO: fix this test better
String ext = Codec.getDefault().getName().equals("SimpleText") ? ".liv" : ".del";
// Create a bogus separate del file for a
// segment that already has a separate del file:
copyFile(dir, "_0_1" + ext, "_0_2" + ext);
// Create a bogus separate del file for a
// segment that does not yet have a separate del file:
copyFile(dir, "_0_1" + ext, "_1_1" + ext);
// Create a bogus separate del file for a
// non-existent segment:
copyFile(dir, "_0_1" + ext, "_188_1" + ext);
// Create a bogus segment file:
copyFile(dir, "_0.cfs", "_188.cfs");
// Create a bogus fnm file when the CFS already exists:
copyFile(dir, "_0.cfs", "_0.fnm");
// Create some old segments file:
copyFile(dir, "segments_2", "segments");
copyFile(dir, "segments_2", "segments_1");
// Create a bogus cfs file shadowing a non-cfs segment:
// TODO: assert is bogus (relies upon codec-specific filenames)
assertTrue(dir.fileExists("_3.fdt") || dir.fileExists("_3.fld"));
assertTrue(!dir.fileExists("_3.cfs"));
copyFile(dir, "_1.cfs", "_3.cfs");
String[] filesPre = dir.listAll();
// Open & close a writer: it should delete the above 4
// files and nothing more:
writer = new IndexWriter(dir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())).setOpenMode(OpenMode.APPEND));
writer.close();
String[] files2 = dir.listAll();
dir.close();
Arrays.sort(files);
Arrays.sort(files2);
Set<String> dif = difFiles(files, files2);
if (!Arrays.equals(files, files2)) {
fail("IndexFileDeleter failed to delete unreferenced extra files: should have deleted " + (filesPre.length-files.length) + " files but only deleted " + (filesPre.length - files2.length) + "; expected files:\n " + asString(files) + "\n actual files:\n " + asString(files2)+"\ndiff: "+dif);
}
}
private static Set<String> difFiles(String[] files1, String[] files2) {
Set<String> set1 = new HashSet<>();
Set<String> set2 = new HashSet<>();
Set<String> extra = new HashSet<>();
for (int x=0; x < files1.length; x++) {
set1.add(files1[x]);
}
for (int x=0; x < files2.length; x++) {
set2.add(files2[x]);
}
Iterator<String> i1 = set1.iterator();
while (i1.hasNext()) {
String o = i1.next();
if (!set2.contains(o)) {
extra.add(o);
}
}
Iterator<String> i2 = set2.iterator();
while (i2.hasNext()) {
String o = i2.next();
if (!set1.contains(o)) {
extra.add(o);
}
}
return extra;
}
private String asString(String[] l) {
String s = "";
for(int i=0;i<l.length;i++) {
if (i > 0) {
s += "\n ";
}
s += l[i];
}
return s;
}
public void copyFile(Directory dir, String src, String dest) throws IOException {
IndexInput in = dir.openInput(src, newIOContext(random()));
IndexOutput out = dir.createOutput(dest, newIOContext(random()));
byte[] b = new byte[1024];
long remainder = in.length();
while(remainder > 0) {
int len = (int) Math.min(b.length, remainder);
in.readBytes(b, 0, len);
out.writeBytes(b, len);
remainder -= len;
}
in.close();
out.close();
}
private void addDoc(IndexWriter writer, int id) throws IOException
{
Document doc = new Document();
doc.add(newTextField("content", "aaa", Field.Store.NO));
doc.add(newStringField("id", Integer.toString(id), Field.Store.NO));
writer.addDocument(doc);
}
}