package org.apache.lucene.index;
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* 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
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* Unless required by applicable law or agreed to in writing, software
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import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.MockDirectoryWrapper;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.TestUtil;
import org.apache.lucene.util.TestUtil;
public class TestForTooMuchCloning extends LuceneTestCase {
// Make sure we don't clone IndexInputs too frequently
// during merging:
public void test() throws Exception {
// NOTE: if we see a fail on this test with "NestedPulsing" its because its
// reuse isnt perfect (but reasonable). see TestPulsingReuse.testNestedPulsing
// for more details
final MockDirectoryWrapper dir = newMockDirectory();
final TieredMergePolicy tmp = new TieredMergePolicy();
tmp.setMaxMergeAtOnce(2);
final RandomIndexWriter w = new RandomIndexWriter(random(), dir,
newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())).setMaxBufferedDocs(2).setMergePolicy(tmp));
final int numDocs = 20;
for(int docs=0;docs<numDocs;docs++) {
StringBuilder sb = new StringBuilder();
for(int terms=0;terms<100;terms++) {
sb.append(TestUtil.randomRealisticUnicodeString(random()));
sb.append(' ');
}
final Document doc = new Document();
doc.add(new TextField("field", sb.toString(), Field.Store.NO));
w.addDocument(doc);
}
final IndexReader r = w.getReader();
w.close();
final int cloneCount = dir.getInputCloneCount();
//System.out.println("merge clone count=" + cloneCount);
assertTrue("too many calls to IndexInput.clone during merging: " + dir.getInputCloneCount(), cloneCount < 500);
final IndexSearcher s = newSearcher(r);
// MTQ that matches all terms so the AUTO_REWRITE should
// cutover to filter rewrite and reuse a single DocsEnum
// across all terms;
final TopDocs hits = s.search(new TermRangeQuery("field",
new BytesRef(),
new BytesRef("\uFFFF"),
true,
true), 10);
assertTrue(hits.totalHits > 0);
final int queryCloneCount = dir.getInputCloneCount() - cloneCount;
//System.out.println("query clone count=" + queryCloneCount);
assertTrue("too many calls to IndexInput.clone during TermRangeQuery: " + queryCloneCount, queryCloneCount < 50);
r.close();
dir.close();
}
}