package org.apache.lucene.search;
/**
* 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.IOException;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LogMergePolicy;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.SerialMergeScheduler;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.spans.SpanTermQuery;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
public class TestCachingSpanFilter extends LuceneTestCase {
public void testEnforceDeletions() throws Exception {
Directory dir = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random, dir,
newIndexWriterConfig(random, TEST_VERSION_CURRENT, new WhitespaceAnalyzer(TEST_VERSION_CURRENT)).setMergeScheduler(new SerialMergeScheduler()));
// asserts below requires no unexpected merges:
((LogMergePolicy) writer.w.getMergePolicy()).setMergeFactor(10);
// NOTE: cannot use writer.getReader because RIW (on
// flipping a coin) may give us a newly opened reader,
// but we use .reopen on this reader below and expect to
// (must) get an NRT reader:
IndexReader reader = IndexReader.open(writer.w, true);
IndexSearcher searcher = newSearcher(reader);
// add a doc, refresh the reader, and check that its there
Document doc = new Document();
doc.add(newField("id", "1", Field.Store.YES, Field.Index.NOT_ANALYZED));
writer.addDocument(doc);
reader = refreshReader(reader);
searcher.close();
searcher = newSearcher(reader);
TopDocs docs = searcher.search(new MatchAllDocsQuery(), 1);
assertEquals("Should find a hit...", 1, docs.totalHits);
final SpanFilter startFilter = new SpanQueryFilter(new SpanTermQuery(new Term("id", "1")));
// ignore deletions
CachingSpanFilter filter = new CachingSpanFilter(startFilter, CachingWrapperFilter.DeletesMode.IGNORE);
docs = searcher.search(new MatchAllDocsQuery(), filter, 1);
assertEquals("[query + filter] Should find a hit...", 1, docs.totalHits);
ConstantScoreQuery constantScore = new ConstantScoreQuery(filter);
docs = searcher.search(constantScore, 1);
assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
// now delete the doc, refresh the reader, and see that it's not there
writer.deleteDocuments(new Term("id", "1"));
reader = refreshReader(reader);
searcher.close();
searcher = newSearcher(reader);
docs = searcher.search(new MatchAllDocsQuery(), filter, 1);
assertEquals("[query + filter] Should *not* find a hit...", 0, docs.totalHits);
docs = searcher.search(constantScore, 1);
assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
// force cache to regenerate:
filter = new CachingSpanFilter(startFilter, CachingWrapperFilter.DeletesMode.RECACHE);
writer.addDocument(doc);
reader = refreshReader(reader);
searcher.close();
searcher = newSearcher(reader);
docs = searcher.search(new MatchAllDocsQuery(), filter, 1);
assertEquals("[query + filter] Should find a hit...", 1, docs.totalHits);
constantScore = new ConstantScoreQuery(filter);
docs = searcher.search(constantScore, 1);
assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
// NOTE: important to hold ref here so GC doesn't clear
// the cache entry! Else the assert below may sometimes
// fail:
IndexReader oldReader = reader;
// make sure we get a cache hit when we reopen readers
// that had no new deletions
reader = refreshReader(reader);
assertTrue(reader != oldReader);
searcher.close();
searcher = newSearcher(reader);
int missCount = filter.missCount;
docs = searcher.search(constantScore, 1);
assertEquals("[just filter] Should find a hit...", 1, docs.totalHits);
assertEquals(missCount, filter.missCount);
// now delete the doc, refresh the reader, and see that it's not there
writer.deleteDocuments(new Term("id", "1"));
reader = refreshReader(reader);
searcher.close();
searcher = newSearcher(reader);
docs = searcher.search(new MatchAllDocsQuery(), filter, 1);
assertEquals("[query + filter] Should *not* find a hit...", 0, docs.totalHits);
docs = searcher.search(constantScore, 1);
assertEquals("[just filter] Should *not* find a hit...", 0, docs.totalHits);
// NOTE: silliness to make sure JRE does not optimize
// away our holding onto oldReader to prevent
// CachingWrapperFilter's WeakHashMap from dropping the
// entry:
assertTrue(oldReader != null);
searcher.close();
writer.close();
reader.close();
dir.close();
}
private static IndexReader refreshReader(IndexReader reader) throws IOException {
IndexReader oldReader = reader;
reader = reader.reopen();
if (reader != oldReader) {
oldReader.close();
}
return reader;
}
}