Java tutorial
/* * 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 com.rocana.lucene.codec.v1; import java.io.IOException; import org.apache.lucene.analysis.MockAnalyzer; import org.apache.lucene.codecs.Codec; import org.apache.lucene.codecs.PostingsFormat; import org.apache.lucene.codecs.asserting.AssertingCodec; import org.apache.lucene.codecs.blockterms.LuceneVarGapFixedInterval; import org.apache.lucene.codecs.memory.MemoryPostingsFormat; import org.apache.lucene.codecs.simpletext.SimpleTextPostingsFormat; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.document.FieldType; import org.apache.lucene.document.TextField; 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.IndexWriterConfig.OpenMode; import org.apache.lucene.index.LogDocMergePolicy; import org.apache.lucene.index.RandomIndexWriter; 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.LuceneTestCase; import org.apache.lucene.util.TestUtil; import org.junit.Test; /** * Fork of Lucene's {@link org.apache.lucene.codecs.perfield.TestPerFieldPostingsFormat2} * from Lucene's git repository, tag: releases/lucene-solr/5.5.0 * * Why we forked: * - To get an extra test for our fork of Lucene's * {@link org.apache.lucene.codecs.perfield.PerFieldPostingsFormat} * * What changed in the fork? * - Use {@link RocanaLucene50PostingsFormat} instead of Lucene's own * {@link org.apache.lucene.codecs.lucene50.Lucene50PostingsFormat}. * - Removed trailing whitespace. * - Changed these javadocs. * - Renamed class to have 'Rocana' in the name. * - Moved to a different package. */ //TODO: would be better in this test to pull termsenums and instanceof or something? // this way we can verify PFPF is doing the right thing. // for now we do termqueries. public class TestRocanaPerFieldPostingsFormat2 extends LuceneTestCase { private IndexWriter newWriter(Directory dir, IndexWriterConfig conf) throws IOException { LogDocMergePolicy logByteSizeMergePolicy = new LogDocMergePolicy(); logByteSizeMergePolicy.setNoCFSRatio(0.0); // make sure we use plain // files conf.setMergePolicy(logByteSizeMergePolicy); final IndexWriter writer = new IndexWriter(dir, conf); return writer; } private void addDocs(IndexWriter writer, int numDocs) throws IOException { for (int i = 0; i < numDocs; i++) { Document doc = new Document(); doc.add(newTextField("content", "aaa", Field.Store.NO)); writer.addDocument(doc); } } private void addDocs2(IndexWriter writer, int numDocs) throws IOException { for (int i = 0; i < numDocs; i++) { Document doc = new Document(); doc.add(newTextField("content", "bbb", Field.Store.NO)); writer.addDocument(doc); } } private void addDocs3(IndexWriter writer, int numDocs) throws IOException { for (int i = 0; i < numDocs; i++) { Document doc = new Document(); doc.add(newTextField("content", "ccc", Field.Store.NO)); doc.add(newStringField("id", "" + i, Field.Store.YES)); writer.addDocument(doc); } } /* * Test that heterogeneous index segments are merge successfully */ @Test public void testMergeUnusedPerFieldCodec() throws IOException { Directory dir = newDirectory(); IndexWriterConfig iwconf = newIndexWriterConfig(new MockAnalyzer(random())).setOpenMode(OpenMode.CREATE) .setCodec(new MockCodec()); IndexWriter writer = newWriter(dir, iwconf); addDocs(writer, 10); writer.commit(); addDocs3(writer, 10); writer.commit(); addDocs2(writer, 10); writer.commit(); assertEquals(30, writer.maxDoc()); TestUtil.checkIndex(dir); writer.forceMerge(1); assertEquals(30, writer.maxDoc()); writer.close(); dir.close(); } /* * Test that heterogeneous index segments are merged sucessfully */ // TODO: not sure this test is that great, we should probably peek inside PerFieldPostingsFormat or something?! @Test public void testChangeCodecAndMerge() throws IOException { Directory dir = newDirectory(); if (VERBOSE) { System.out.println("TEST: make new index"); } IndexWriterConfig iwconf = newIndexWriterConfig(new MockAnalyzer(random())).setOpenMode(OpenMode.CREATE) .setCodec(new MockCodec()); iwconf.setMaxBufferedDocs(IndexWriterConfig.DISABLE_AUTO_FLUSH); //((LogMergePolicy) iwconf.getMergePolicy()).setMergeFactor(10); IndexWriter writer = newWriter(dir, iwconf); addDocs(writer, 10); writer.commit(); assertQuery(new Term("content", "aaa"), dir, 10); if (VERBOSE) { System.out.println("TEST: addDocs3"); } addDocs3(writer, 10); writer.commit(); writer.close(); assertQuery(new Term("content", "ccc"), dir, 10); assertQuery(new Term("content", "aaa"), dir, 10); Codec codec = iwconf.getCodec(); iwconf = newIndexWriterConfig(new MockAnalyzer(random())).setOpenMode(OpenMode.APPEND).setCodec(codec); //((LogMergePolicy) iwconf.getMergePolicy()).setNoCFSRatio(0.0); //((LogMergePolicy) iwconf.getMergePolicy()).setMergeFactor(10); iwconf.setMaxBufferedDocs(IndexWriterConfig.DISABLE_AUTO_FLUSH); iwconf.setCodec(new MockCodec2()); // uses standard for field content writer = newWriter(dir, iwconf); // swap in new codec for currently written segments if (VERBOSE) { System.out.println("TEST: add docs w/ Standard codec for content field"); } addDocs2(writer, 10); writer.commit(); codec = iwconf.getCodec(); assertEquals(30, writer.maxDoc()); assertQuery(new Term("content", "bbb"), dir, 10); assertQuery(new Term("content", "ccc"), dir, 10); //// assertQuery(new Term("content", "aaa"), dir, 10); if (VERBOSE) { System.out.println("TEST: add more docs w/ new codec"); } addDocs2(writer, 10); writer.commit(); assertQuery(new Term("content", "ccc"), dir, 10); assertQuery(new Term("content", "bbb"), dir, 20); assertQuery(new Term("content", "aaa"), dir, 10); assertEquals(40, writer.maxDoc()); if (VERBOSE) { System.out.println("TEST: now optimize"); } writer.forceMerge(1); assertEquals(40, writer.maxDoc()); writer.close(); assertQuery(new Term("content", "ccc"), dir, 10); assertQuery(new Term("content", "bbb"), dir, 20); assertQuery(new Term("content", "aaa"), dir, 10); dir.close(); } public void assertQuery(Term t, Directory dir, int num) throws IOException { if (VERBOSE) { System.out.println("\nTEST: assertQuery " + t); } IndexReader reader = DirectoryReader.open(dir); IndexSearcher searcher = newSearcher(reader); TopDocs search = searcher.search(new TermQuery(t), num + 10); assertEquals(num, search.totalHits); reader.close(); } public static class MockCodec extends AssertingCodec { final PostingsFormat luceneDefault = new RocanaLucene50PostingsFormat(); final PostingsFormat simpleText = new SimpleTextPostingsFormat(); final PostingsFormat memory = new MemoryPostingsFormat(); @Override public PostingsFormat getPostingsFormatForField(String field) { if (field.equals("id")) { return simpleText; } else if (field.equals("content")) { return memory; } else { return luceneDefault; } } } public static class MockCodec2 extends AssertingCodec { final PostingsFormat luceneDefault = new RocanaLucene50PostingsFormat(); final PostingsFormat simpleText = new SimpleTextPostingsFormat(); @Override public PostingsFormat getPostingsFormatForField(String field) { if (field.equals("id")) { return simpleText; } else { return luceneDefault; } } } /* * Test per field codec support - adding fields with random codecs */ @Test public void testStressPerFieldCodec() throws IOException { Directory dir = newDirectory(random()); final int docsPerRound = 97; int numRounds = atLeast(1); for (int i = 0; i < numRounds; i++) { int num = TestUtil.nextInt(random(), 30, 60); IndexWriterConfig config = newIndexWriterConfig(random(), new MockAnalyzer(random())); config.setOpenMode(OpenMode.CREATE_OR_APPEND); IndexWriter writer = newWriter(dir, config); for (int j = 0; j < docsPerRound; j++) { final Document doc = new Document(); for (int k = 0; k < num; k++) { FieldType customType = new FieldType(TextField.TYPE_NOT_STORED); customType.setTokenized(random().nextBoolean()); customType.setOmitNorms(random().nextBoolean()); Field field = newField("" + k, TestUtil.randomRealisticUnicodeString(random(), 128), customType); doc.add(field); } writer.addDocument(doc); } if (random().nextBoolean()) { writer.forceMerge(1); } writer.commit(); assertEquals((i + 1) * docsPerRound, writer.maxDoc()); writer.close(); } dir.close(); } public void testSameCodecDifferentInstance() throws Exception { Codec codec = new AssertingCodec() { @Override public PostingsFormat getPostingsFormatForField(String field) { if ("id".equals(field)) { return new MemoryPostingsFormat(); } else if ("date".equals(field)) { return new MemoryPostingsFormat(); } else { return super.getPostingsFormatForField(field); } } }; doTestMixedPostings(codec); } public void testSameCodecDifferentParams() throws Exception { Codec codec = new AssertingCodec() { @Override public PostingsFormat getPostingsFormatForField(String field) { if ("id".equals(field)) { return new LuceneVarGapFixedInterval(1); } else if ("date".equals(field)) { return new LuceneVarGapFixedInterval(2); } else { return super.getPostingsFormatForField(field); } } }; doTestMixedPostings(codec); } private void doTestMixedPostings(Codec codec) throws Exception { Directory dir = newDirectory(); IndexWriterConfig iwc = newIndexWriterConfig(new MockAnalyzer(random())); iwc.setCodec(codec); RandomIndexWriter iw = new RandomIndexWriter(random(), dir, iwc); Document doc = new Document(); FieldType ft = new FieldType(TextField.TYPE_NOT_STORED); // turn on vectors for the checkindex cross-check ft.setStoreTermVectors(true); ft.setStoreTermVectorOffsets(true); ft.setStoreTermVectorPositions(true); Field idField = new Field("id", "", ft); Field dateField = new Field("date", "", ft); doc.add(idField); doc.add(dateField); for (int i = 0; i < 100; i++) { idField.setStringValue(Integer.toString(random().nextInt(50))); dateField.setStringValue(Integer.toString(random().nextInt(100))); iw.addDocument(doc); } iw.close(); dir.close(); // checkindex } }