| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.lucene.analysis.MockAnalyzer; |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.NumericDocValuesField; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.RAMDirectory; |
| import org.apache.lucene.util.TestUtil; |
| import org.apache.lucene.util.packed.PackedInts; |
| |
| import com.carrotsearch.randomizedtesting.generators.RandomPicks; |
| |
| /** Extends {@link BaseDocValuesFormatTestCase} to add compression checks. */ |
| public abstract class BaseCompressingDocValuesFormatTestCase extends BaseDocValuesFormatTestCase { |
| |
| static long dirSize(Directory d) throws IOException { |
| long size = 0; |
| for (String file : d.listAll()) { |
| size += d.fileLength(file); |
| } |
| return size; |
| } |
| |
| public void testUniqueValuesCompression() throws IOException { |
| final Directory dir = new RAMDirectory(); |
| final IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random())); |
| final IndexWriter iwriter = new IndexWriter(dir, iwc); |
| |
| final int uniqueValueCount = TestUtil.nextInt(random(), 1, 256); |
| final List<Long> values = new ArrayList<>(); |
| |
| final Document doc = new Document(); |
| final NumericDocValuesField dvf = new NumericDocValuesField("dv", 0); |
| doc.add(dvf); |
| for (int i = 0; i < 300; ++i) { |
| final long value; |
| if (values.size() < uniqueValueCount) { |
| value = random().nextLong(); |
| values.add(value); |
| } else { |
| value = RandomPicks.randomFrom(random(), values); |
| } |
| dvf.setLongValue(value); |
| iwriter.addDocument(doc); |
| } |
| iwriter.forceMerge(1); |
| final long size1 = dirSize(dir); |
| for (int i = 0; i < 20; ++i) { |
| dvf.setLongValue(RandomPicks.randomFrom(random(), values)); |
| iwriter.addDocument(doc); |
| } |
| iwriter.forceMerge(1); |
| final long size2 = dirSize(dir); |
| // make sure the new longs did not cost 8 bytes each |
| assertTrue(size2 < size1 + 8 * 20); |
| } |
| |
| public void testDateCompression() throws IOException { |
| final Directory dir = new RAMDirectory(); |
| final IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random())); |
| final IndexWriter iwriter = new IndexWriter(dir, iwc); |
| |
| final long base = 13; // prime |
| final long day = 1000L * 60 * 60 * 24; |
| |
| final Document doc = new Document(); |
| final NumericDocValuesField dvf = new NumericDocValuesField("dv", 0); |
| doc.add(dvf); |
| for (int i = 0; i < 300; ++i) { |
| dvf.setLongValue(base + random().nextInt(1000) * day); |
| iwriter.addDocument(doc); |
| } |
| iwriter.forceMerge(1); |
| final long size1 = dirSize(dir); |
| for (int i = 0; i < 50; ++i) { |
| dvf.setLongValue(base + random().nextInt(1000) * day); |
| iwriter.addDocument(doc); |
| } |
| iwriter.forceMerge(1); |
| final long size2 = dirSize(dir); |
| // make sure the new longs costed less than if they had only been packed |
| assertTrue(size2 < size1 + (PackedInts.bitsRequired(day) * 50) / 8); |
| } |
| |
| public void testSingleBigValueCompression() throws IOException { |
| final Directory dir = new RAMDirectory(); |
| final IndexWriterConfig iwc = new IndexWriterConfig(new MockAnalyzer(random())); |
| final IndexWriter iwriter = new IndexWriter(dir, iwc); |
| |
| final Document doc = new Document(); |
| final NumericDocValuesField dvf = new NumericDocValuesField("dv", 0); |
| doc.add(dvf); |
| for (int i = 0; i < 20000; ++i) { |
| dvf.setLongValue(i & 1023); |
| iwriter.addDocument(doc); |
| } |
| iwriter.forceMerge(1); |
| final long size1 = dirSize(dir); |
| dvf.setLongValue(Long.MAX_VALUE); |
| iwriter.addDocument(doc); |
| iwriter.forceMerge(1); |
| final long size2 = dirSize(dir); |
| // make sure the new value did not grow the bpv for every other value |
| assertTrue(size2 < size1 + (20000 * (63 - 10)) / 8); |
| } |
| |
| } |