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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.common.lucene;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.MultiReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Explanation;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.LRUQueryCache;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryCachingPolicy;
import org.apache.lucene.search.QueryUtils;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.Weight;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.Version;
import org.elasticsearch.test.ESTestCase;
import java.io.IOException;
import java.util.Set;
public class IndexCacheableQueryTests extends ESTestCase {
static class DummyIndexCacheableQuery extends IndexCacheableQuery {
@Override
public String toString(String field) {
return "DummyIndexCacheableQuery";
}
@Override
public Weight doCreateWeight(IndexSearcher searcher, boolean needsScores) throws IOException {
return new Weight(this) {
@Override
public void extractTerms(Set<Term> terms) {
throw new UnsupportedOperationException();
}
@Override
public Explanation explain(LeafReaderContext context, int doc) throws IOException {
throw new UnsupportedOperationException();
}
@Override
public float getValueForNormalization() throws IOException {
return 0;
}
@Override
public void normalize(float norm, float topLevelBoost) {
}
@Override
public Scorer scorer(LeafReaderContext context) throws IOException {
return null;
}
};
}
}
public void testBasics() throws IOException {
DummyIndexCacheableQuery query = new DummyIndexCacheableQuery();
QueryUtils.check(query);
Query rewritten = query.rewrite(new MultiReader(new IndexReader[0]));
QueryUtils.check(rewritten);
QueryUtils.checkUnequal(query, rewritten);
Query rewritten2 = query.rewrite(new MultiReader(new IndexReader[0]));
QueryUtils.check(rewritten2);
QueryUtils.checkUnequal(rewritten, rewritten2);
}
public void testCache() throws IOException {
Directory dir = newDirectory();
LRUQueryCache cache = new LRUQueryCache(10000, Long.MAX_VALUE);
QueryCachingPolicy policy = QueryCachingPolicy.ALWAYS_CACHE;
RandomIndexWriter writer = new RandomIndexWriter(getRandom(), dir);
for (int i = 0; i < 10; ++i) {
writer.addDocument(new Document());
}
IndexReader reader = writer.getReader();
IndexSearcher searcher = newSearcher(reader);
reader = searcher.getIndexReader(); // reader might be wrapped
searcher.setQueryCache(cache);
searcher.setQueryCachingPolicy(policy);
assertEquals(0, cache.getCacheSize());
DummyIndexCacheableQuery query = new DummyIndexCacheableQuery();
searcher.count(query);
int expectedCacheSize = reader.leaves().size();
assertEquals(expectedCacheSize, cache.getCacheSize());
searcher.count(query);
assertEquals(expectedCacheSize, cache.getCacheSize());
writer.addDocument(new Document());
IndexReader reader2 = writer.getReader();
searcher = newSearcher(reader2);
reader2 = searcher.getIndexReader(); // reader might be wrapped
searcher.setQueryCache(cache);
searcher.setQueryCachingPolicy(policy);
// since the query is only cacheable at the index level, it has to be recomputed on all leaves
expectedCacheSize += reader2.leaves().size();
searcher.count(query);
assertEquals(expectedCacheSize, cache.getCacheSize());
searcher.count(query);
assertEquals(expectedCacheSize, cache.getCacheSize());
reader.close();
reader2.close();
writer.close();
assertEquals(0, cache.getCacheSize());
dir.close();
}
}
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