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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.shard;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.FieldFilterLeafReader;
import org.apache.lucene.index.FilterDirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.IOUtils;
import org.elasticsearch.common.lucene.index.ElasticsearchDirectoryReader;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.engine.EngineException;
import org.elasticsearch.test.ESTestCase;
import java.io.IOException;
import java.util.Collections;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
public class IndexSearcherWrapperTests extends ESTestCase {
public void testReaderCloseListenerIsCalled() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig();
IndexWriter writer = new IndexWriter(dir, iwc);
Document doc = new Document();
doc.add(new StringField("id", "1", random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
doc.add(new TextField("field", "doc", random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
writer.addDocument(doc);
DirectoryReader open = ElasticsearchDirectoryReader.wrap(DirectoryReader.open(writer), new ShardId("foo", "_na_", 1));
IndexSearcher searcher = new IndexSearcher(open);
assertEquals(1, searcher.search(new TermQuery(new Term("field", "doc")), 1).totalHits);
final AtomicInteger closeCalls = new AtomicInteger(0);
IndexSearcherWrapper wrapper = new IndexSearcherWrapper() {
@Override
public DirectoryReader wrap(DirectoryReader reader) throws IOException {
return new FieldMaskingReader("field", reader, closeCalls);
}
@Override
public IndexSearcher wrap(IndexSearcher searcher) throws EngineException {
return searcher;
}
};
final int sourceRefCount = open.getRefCount();
final AtomicInteger count = new AtomicInteger();
final AtomicInteger outerCount = new AtomicInteger();
try (Engine.Searcher engineSearcher = new Engine.Searcher("foo", searcher)) {
final Engine.Searcher wrap = wrapper.wrap(engineSearcher);
assertEquals(1, wrap.reader().getRefCount());
ElasticsearchDirectoryReader.addReaderCloseListener(wrap.getDirectoryReader(), key -> {
if (key == open.getReaderCacheHelper().getKey()) {
count.incrementAndGet();
}
outerCount.incrementAndGet();
});
assertEquals(0, wrap.searcher().search(new TermQuery(new Term("field", "doc")), 1).totalHits);
wrap.close();
assertFalse("wrapped reader is closed", wrap.reader().tryIncRef());
assertEquals(sourceRefCount, open.getRefCount());
}
assertEquals(1, closeCalls.get());
IOUtils.close(open, writer, dir);
assertEquals(1, outerCount.get());
assertEquals(1, count.get());
assertEquals(0, open.getRefCount());
assertEquals(1, closeCalls.get());
}
public void testIsCacheable() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig();
IndexWriter writer = new IndexWriter(dir, iwc);
Document doc = new Document();
doc.add(new StringField("id", "1", random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
doc.add(new TextField("field", "doc", random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
writer.addDocument(doc);
DirectoryReader open = ElasticsearchDirectoryReader.wrap(DirectoryReader.open(writer), new ShardId("foo", "_na_", 1));
IndexSearcher searcher = new IndexSearcher(open);
assertEquals(1, searcher.search(new TermQuery(new Term("field", "doc")), 1).totalHits);
searcher.setSimilarity(iwc.getSimilarity());
final AtomicInteger closeCalls = new AtomicInteger(0);
IndexSearcherWrapper wrapper = new IndexSearcherWrapper() {
@Override
public DirectoryReader wrap(DirectoryReader reader) throws IOException {
return new FieldMaskingReader("field", reader, closeCalls);
}
@Override
public IndexSearcher wrap(IndexSearcher searcher) throws EngineException {
return searcher;
}
};
final ConcurrentHashMap<Object, TopDocs> cache = new ConcurrentHashMap<>();
try (Engine.Searcher engineSearcher = new Engine.Searcher("foo", searcher)) {
try (Engine.Searcher wrap = wrapper.wrap(engineSearcher)) {
ElasticsearchDirectoryReader.addReaderCloseListener(wrap.getDirectoryReader(), key -> {
cache.remove(key);
});
TopDocs search = wrap.searcher().search(new TermQuery(new Term("field", "doc")), 1);
cache.put(wrap.reader().getReaderCacheHelper().getKey(), search);
}
}
assertEquals(1, closeCalls.get());
assertEquals(1, cache.size());
IOUtils.close(open, writer, dir);
assertEquals(0, cache.size());
assertEquals(1, closeCalls.get());
}
public void testNoWrap() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig();
IndexWriter writer = new IndexWriter(dir, iwc);
Document doc = new Document();
doc.add(new StringField("id", "1", random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
doc.add(new TextField("field", "doc", random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
writer.addDocument(doc);
DirectoryReader open = ElasticsearchDirectoryReader.wrap(DirectoryReader.open(writer), new ShardId("foo", "_na_", 1));
IndexSearcher searcher = new IndexSearcher(open);
assertEquals(1, searcher.search(new TermQuery(new Term("field", "doc")), 1).totalHits);
searcher.setSimilarity(iwc.getSimilarity());
IndexSearcherWrapper wrapper = new IndexSearcherWrapper();
try (Engine.Searcher engineSearcher = new Engine.Searcher("foo", searcher)) {
final Engine.Searcher wrap = wrapper.wrap(engineSearcher);
assertSame(wrap, engineSearcher);
}
IOUtils.close(open, writer, dir);
}
private static class FieldMaskingReader extends FilterDirectoryReader {
private final String field;
private final AtomicInteger closeCalls;
FieldMaskingReader(String field, DirectoryReader in, AtomicInteger closeCalls) throws IOException {
super(in, new SubReaderWrapper() {
@Override
public LeafReader wrap(LeafReader reader) {
return new FieldFilterLeafReader(reader, Collections.singleton(field), true);
}
});
this.closeCalls = closeCalls;
this.field = field;
}
@Override
protected DirectoryReader doWrapDirectoryReader(DirectoryReader in) throws IOException {
return new FieldMaskingReader(field, in, closeCalls);
}
@Override
public CacheHelper getReaderCacheHelper() {
return in.getReaderCacheHelper();
}
@Override
protected void doClose() throws IOException {
super.doClose();
closeCalls.incrementAndGet();
}
}
}
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