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* 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.
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package org.apache.lucene.index;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import org.apache.lucene.codecs.Codec;
import org.apache.lucene.document.Document;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.IOContext;
import org.apache.lucene.store.MergeInfo;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.FixedBitSet;
import org.apache.lucene.util.InfoStream;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.StringHelper;
import org.apache.lucene.util.TestUtil;
import org.apache.lucene.util.Version;
import org.apache.lucene.util.packed.PackedLongValues;
public class TestSegmentMerger extends LuceneTestCase {
//The variables for the new merged segment
private Directory mergedDir;
private String mergedSegment = "test";
//First segment to be merged
private Directory merge1Dir;
private Document doc1 = new Document();
private SegmentReader reader1 = null;
//Second Segment to be merged
private Directory merge2Dir;
private Document doc2 = new Document();
private SegmentReader reader2 = null;
@Override
public void setUp() throws Exception {
super.setUp();
mergedDir = newDirectory();
merge1Dir = newDirectory();
merge2Dir = newDirectory();
DocHelper.setupDoc(doc1);
SegmentCommitInfo info1 = DocHelper.writeDoc(random(), merge1Dir, doc1);
DocHelper.setupDoc(doc2);
SegmentCommitInfo info2 = DocHelper.writeDoc(random(), merge2Dir, doc2);
reader1 = new SegmentReader(info1, Version.LATEST.major, newIOContext(random()));
reader2 = new SegmentReader(info2, Version.LATEST.major, newIOContext(random()));
}
@Override
public void tearDown() throws Exception {
reader1.close();
reader2.close();
mergedDir.close();
merge1Dir.close();
merge2Dir.close();
super.tearDown();
}
public void test() {
assertTrue(mergedDir != null);
assertTrue(merge1Dir != null);
assertTrue(merge2Dir != null);
assertTrue(reader1 != null);
assertTrue(reader2 != null);
}
public void testMerge() throws IOException {
final Codec codec = Codec.getDefault();
final SegmentInfo si = new SegmentInfo(mergedDir, Version.LATEST, null, mergedSegment, -1, false, codec, Collections.emptyMap(), StringHelper.randomId(), new HashMap<>(), null);
SegmentMerger merger = new SegmentMerger(Arrays.<CodecReader>asList(reader1, reader2),
si, InfoStream.getDefault(), mergedDir,
new FieldInfos.FieldNumbers(),
newIOContext(random(), new IOContext(new MergeInfo(-1, -1, false, -1))));
MergeState mergeState = merger.merge();
int docsMerged = mergeState.segmentInfo.maxDoc();
assertTrue(docsMerged == 2);
//Should be able to open a new SegmentReader against the new directory
SegmentReader mergedReader = new SegmentReader(new SegmentCommitInfo(
mergeState.segmentInfo,
0, -1L, -1L, -1L),
Version.LATEST.major,
newIOContext(random()));
assertTrue(mergedReader != null);
assertTrue(mergedReader.numDocs() == 2);
Document newDoc1 = mergedReader.document(0);
assertTrue(newDoc1 != null);
//There are 2 unstored fields on the document
assertTrue(DocHelper.numFields(newDoc1) == DocHelper.numFields(doc1) - DocHelper.unstored.size());
Document newDoc2 = mergedReader.document(1);
assertTrue(newDoc2 != null);
assertTrue(DocHelper.numFields(newDoc2) == DocHelper.numFields(doc2) - DocHelper.unstored.size());
PostingsEnum termDocs = TestUtil.docs(random(), mergedReader,
DocHelper.TEXT_FIELD_2_KEY,
new BytesRef("field"),
null,
0);
assertTrue(termDocs != null);
assertTrue(termDocs.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
int tvCount = 0;
for(FieldInfo fieldInfo : mergedReader.getFieldInfos()) {
if (fieldInfo.hasVectors()) {
tvCount++;
}
}
//System.out.println("stored size: " + stored.size());
assertEquals("We do not have 3 fields that were indexed with term vector", 3, tvCount);
Terms vector = mergedReader.getTermVectors(0).terms(DocHelper.TEXT_FIELD_2_KEY);
assertNotNull(vector);
assertEquals(3, vector.size());
TermsEnum termsEnum = vector.iterator();
int i = 0;
while (termsEnum.next() != null) {
String term = termsEnum.term().utf8ToString();
int freq = (int) termsEnum.totalTermFreq();
//System.out.println("Term: " + term + " Freq: " + freq);
assertTrue(DocHelper.FIELD_2_TEXT.indexOf(term) != -1);
assertTrue(DocHelper.FIELD_2_FREQS[i] == freq);
i++;
}
TestSegmentReader.checkNorms(mergedReader);
mergedReader.close();
}
public void testBuildDocMap() {
final int maxDoc = TestUtil.nextInt(random(), 1, 128);
final int numDocs = TestUtil.nextInt(random(), 0, maxDoc);
final FixedBitSet liveDocs = new FixedBitSet(maxDoc);
for (int i = 0; i < numDocs; ++i) {
while (true) {
final int docID = random().nextInt(maxDoc);
if (!liveDocs.get(docID)) {
liveDocs.set(docID);
break;
}
}
}
final PackedLongValues docMap = MergeState.removeDeletes(maxDoc, liveDocs);
// assert the mapping is compact
for (int i = 0, del = 0; i < maxDoc; ++i) {
if (liveDocs.get(i) == false) {
++del;
} else {
assertEquals(i - del, docMap.get(i));
}
}
}
}