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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.index.cache.bitset;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.LogByteSizeMergePolicy;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.join.BitSetProducer;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Accountable;
import org.apache.lucene.util.BitSet;
import org.apache.lucene.util.IOUtils;
import org.elasticsearch.common.lucene.index.ElasticsearchDirectoryReader;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.test.ESTestCase;
import org.junit.Test;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import static org.hamcrest.Matchers.equalTo;
public class BitSetFilterCacheTests extends ESTestCase {
private static int matchCount(BitSetProducer producer, IndexReader reader) throws IOException {
int count = 0;
for (LeafReaderContext ctx : reader.leaves()) {
final BitSet bitSet = producer.getBitSet(ctx);
if (bitSet != null) {
count += bitSet.cardinality();
}
}
return count;
}
@Test
public void testInvalidateEntries() throws Exception {
IndexWriter writer = new IndexWriter(
new RAMDirectory(),
new IndexWriterConfig(new StandardAnalyzer()).setMergePolicy(new LogByteSizeMergePolicy())
);
Document document = new Document();
document.add(new StringField("field", "value", Field.Store.NO));
writer.addDocument(document);
writer.commit();
document = new Document();
document.add(new StringField("field", "value", Field.Store.NO));
writer.addDocument(document);
writer.commit();
document = new Document();
document.add(new StringField("field", "value", Field.Store.NO));
writer.addDocument(document);
writer.commit();
IndexReader reader = DirectoryReader.open(writer, false);
IndexSearcher searcher = new IndexSearcher(reader);
BitsetFilterCache cache = new BitsetFilterCache(new Index("test"), Settings.EMPTY);
BitSetProducer filter = cache.getBitSetProducer(new TermQuery(new Term("field", "value")));
assertThat(matchCount(filter, reader), equalTo(3));
// now cached
assertThat(matchCount(filter, reader), equalTo(3));
// There are 3 segments
assertThat(cache.getLoadedFilters().weight(), equalTo(3L));
writer.forceMerge(1);
reader.close();
reader = DirectoryReader.open(writer, false);
searcher = new IndexSearcher(reader);
assertThat(matchCount(filter, reader), equalTo(3));
// now cached
assertThat(matchCount(filter, reader), equalTo(3));
// Only one segment now, so the size must be 1
assertThat(cache.getLoadedFilters().weight(), equalTo(1L));
reader.close();
writer.close();
// There is no reference from readers and writer to any segment in the test index, so the size in the fbs cache must be 0
assertThat(cache.getLoadedFilters().weight(), equalTo(0L));
}
public void testListener() throws IOException {
IndexWriter writer = new IndexWriter(
new RAMDirectory(),
new IndexWriterConfig(new StandardAnalyzer()).setMergePolicy(new LogByteSizeMergePolicy())
);
Document document = new Document();
document.add(new StringField("field", "value", Field.Store.NO));
writer.addDocument(document);
writer.commit();
final DirectoryReader writerReader = DirectoryReader.open(writer, false);
final IndexReader reader = randomBoolean() ? writerReader : ElasticsearchDirectoryReader.wrap(writerReader, new ShardId("test", 0));
final AtomicLong stats = new AtomicLong();
final AtomicInteger onCacheCalls = new AtomicInteger();
final AtomicInteger onRemoveCalls = new AtomicInteger();
final BitsetFilterCache cache = new BitsetFilterCache(new Index("test"), Settings.EMPTY);
cache.setListener(new BitsetFilterCache.Listener() {
@Override
public void onCache(ShardId shardId, Accountable accountable) {
onCacheCalls.incrementAndGet();
stats.addAndGet(accountable.ramBytesUsed());
if (writerReader != reader) {
assertNotNull(shardId);
assertEquals("test", shardId.index().name());
assertEquals(0, shardId.id());
} else {
assertNull(shardId);
}
}
@Override
public void onRemoval(ShardId shardId, Accountable accountable) {
onRemoveCalls.incrementAndGet();
stats.addAndGet(-accountable.ramBytesUsed());
if (writerReader != reader) {
assertNotNull(shardId);
assertEquals("test", shardId.index().name());
assertEquals(0, shardId.id());
} else {
assertNull(shardId);
}
}
});
BitSetProducer filter = cache.getBitSetProducer(new TermQuery(new Term("field", "value")));
assertThat(matchCount(filter, reader), equalTo(1));
assertTrue(stats.get() > 0);
assertEquals(1, onCacheCalls.get());
assertEquals(0, onRemoveCalls.get());
IOUtils.close(reader, writer);
assertEquals(1, onRemoveCalls.get());
assertEquals(0, stats.get());
}
public void testSetListenerTwice() {
final BitsetFilterCache cache = new BitsetFilterCache(new Index("test"), Settings.EMPTY);
cache.setListener(new BitsetFilterCache.Listener() {
@Override
public void onCache(ShardId shardId, Accountable accountable) {
}
@Override
public void onRemoval(ShardId shardId, Accountable accountable) {
}
});
try {
cache.setListener(new BitsetFilterCache.Listener() {
@Override
public void onCache(ShardId shardId, Accountable accountable) {
}
@Override
public void onRemoval(ShardId shardId, Accountable accountable) {
}
});
fail("can't set it twice");
} catch (IllegalStateException ex) {
// all is well
}
}
}
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