#62: Migration to Lucene 5 (without rebuilding old index)

docs-core/pom.xml

@@ -93,11 +93,6 @@
       <artifactId>lucene-queryparser</artifactId>
     </dependency>
     
-    <dependency>
-      <groupId>org.apache.lucene</groupId>
-      <artifactId>lucene-highlighter</artifactId>
-    </dependency>
-    
     <dependency>
       <groupId>org.imgscalr</groupId>
       <artifactId>imgscalr-lib</artifactId>

docs-core/src/main/java/com/sismics/docs/core/dao/lucene/DocsStandardAnalyzer.java

@@ -1,135 +0,0 @@
-package com.sismics.docs.core.dao.lucene;
-
-/*
- * 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.
- */
-
-import org.apache.lucene.analysis.TokenStream;
-import org.apache.lucene.analysis.charfilter.HTMLStripCharFilter;
-import org.apache.lucene.analysis.core.LowerCaseFilter;
-import org.apache.lucene.analysis.core.StopAnalyzer;
-import org.apache.lucene.analysis.core.StopFilter;
-import org.apache.lucene.analysis.standard.ClassicAnalyzer;
-import org.apache.lucene.analysis.standard.ClassicTokenizer;
-import org.apache.lucene.analysis.standard.StandardFilter;
-import org.apache.lucene.analysis.standard.StandardTokenizer;
-import org.apache.lucene.analysis.util.CharArraySet;
-import org.apache.lucene.analysis.util.StopwordAnalyzerBase;
-import org.apache.lucene.util.Version;
-
-import java.io.IOException;
-import java.io.Reader;
-
-/**
- * Filters {@link StandardTokenizer} with {@link StandardFilter}, {@link
- * LowerCaseFilter} and {@link StopFilter}, using a list of
- * English stop words.
- *
- * <a name="version"/>
- * <p>You must specify the required {@link Version}
- * compatibility when creating StandardAnalyzer:
- * <ul>
- *   <li> As of 3.4, Hiragana and Han characters are no longer wrongly split
- *        from their combining characters. If you use a previous version number,
- *        you get the exact broken behavior for backwards compatibility.
- *   <li> As of 3.1, StandardTokenizer implements Unicode text segmentation,
- *        and StopFilter correctly handles Unicode 4.0 supplementary characters
- *        in stopwords.  {@link ClassicTokenizer} and {@link ClassicAnalyzer} 
- *        are the pre-3.1 implementations of StandardTokenizer and
- *        StandardAnalyzer.
- *   <li> As of 2.9, StopFilter preserves position increments
- *   <li> As of 2.4, Tokens incorrectly identified as acronyms
- *        are corrected (see <a href="https://issues.apache.org/jira/browse/LUCENE-1068">LUCENE-1068</a>)
- * </ul>
- */
-public final class DocsStandardAnalyzer extends StopwordAnalyzerBase {
-
-  /** Default maximum allowed token length */
-  public static final int DEFAULT_MAX_TOKEN_LENGTH = 255;
-
-  private int maxTokenLength = DEFAULT_MAX_TOKEN_LENGTH;
-
-  /** An unmodifiable set containing some common English words that are usually not
-  useful for searching. */
-  public static final CharArraySet STOP_WORDS_SET = StopAnalyzer.ENGLISH_STOP_WORDS_SET; 
-
-  /** Builds an analyzer with the given stop words.
-   * @param matchVersion Lucene version to match See {@link
-   * <a href="#version">above</a>}
-   * @param stopWords stop words */
-  public DocsStandardAnalyzer(Version matchVersion, CharArraySet stopWords) {
-    super(matchVersion, stopWords);
-  }
-
-  /** Builds an analyzer with the default stop words ({@link
-   * #STOP_WORDS_SET}).
-   * @param matchVersion Lucene version to match See {@link
-   * <a href="#version">above</a>}
-   */
-  public DocsStandardAnalyzer(Version matchVersion) {
-    this(matchVersion, STOP_WORDS_SET);
-  }
-
-  /** Builds an analyzer with the stop words from the given reader.
-   * @see WordlistLoader#getWordSet(Reader, Version)
-   * @param matchVersion Lucene version to match See {@link
-   * <a href="#version">above</a>}
-   * @param stopwords Reader to read stop words from */
-  public DocsStandardAnalyzer(Version matchVersion, Reader stopwords) throws IOException {
-    this(matchVersion, loadStopwordSet(stopwords, matchVersion));
-  }
-
-  /**
-   * Set maximum allowed token length.  If a token is seen
-   * that exceeds this length then it is discarded.  This
-   * setting only takes effect the next time tokenStream or
-   * tokenStream is called.
-   */
-  public void setMaxTokenLength(int length) {
-    maxTokenLength = length;
-  }
-    
-  /**
-   * @see #setMaxTokenLength
-   */
-  public int getMaxTokenLength() {
-    return maxTokenLength;
-  }
-
-  @Override
-  protected TokenStreamComponents createComponents(final String fieldName, final Reader reader) {
-    final StandardTokenizer src = new StandardTokenizer(matchVersion, reader);
-    src.setMaxTokenLength(maxTokenLength);
-    TokenStream tok = new StandardFilter(matchVersion, src);
-    tok = new LowerCaseFilter(matchVersion, tok);
-    tok = new StopFilter(matchVersion, tok, stopwords);
-    return new TokenStreamComponents(src, tok) {
-      @Override
-      protected void setReader(final Reader reader) throws IOException {
-        src.setMaxTokenLength(DocsStandardAnalyzer.this.maxTokenLength);
-        super.setReader(reader);
-      }
-    };
-  }
-  
-  @Override
-    protected Reader initReader(String fieldName, Reader reader) {
-        if (fieldName.equals("title") || fieldName.equals("description")) {
-            return new HTMLStripCharFilter(super.initReader(fieldName, reader));
-        }
-        return super.initReader(fieldName, reader);
-    }
-}

docs-core/src/main/java/com/sismics/docs/core/dao/lucene/LuceneDao.java

@@ -6,6 +6,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+import org.apache.lucene.analysis.standard.StandardAnalyzer;
 import org.apache.lucene.document.Field;
 import org.apache.lucene.document.StringField;
 import org.apache.lucene.document.TextField;
@@ -19,7 +20,6 @@ import org.apache.lucene.search.BooleanQuery;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.ScoreDoc;
 import org.apache.lucene.search.TopDocs;
-import org.apache.lucene.util.Version;
 
 import com.sismics.docs.core.model.context.AppContext;
 import com.sismics.docs.core.model.jpa.Document;
@@ -152,22 +152,23 @@ public class LuceneDao {
         fullSearchQuery = "\"" + QueryParserUtil.escape(fullSearchQuery) + "\"";
         
         // Build search query
-        StandardQueryParser qpHelper = new StandardQueryParser(new DocsStandardAnalyzer(Version.LUCENE_42));
+        StandardQueryParser qpHelper = new StandardQueryParser(new StandardAnalyzer());
         qpHelper.setPhraseSlop(100000); // PhraseQuery add terms
         
         // Search on documents and files
-        BooleanQuery query = new BooleanQuery();
+        BooleanQuery query = new BooleanQuery.Builder()
-        query.add(qpHelper.parse(searchQuery, "title"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "title"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "description"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "description"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "subject"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "subject"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "identifier"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "identifier"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "publisher"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "publisher"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "format"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "format"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "source"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "source"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "type"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "type"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "coverage"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "coverage"), Occur.SHOULD)
-        query.add(qpHelper.parse(searchQuery, "rights"), Occur.SHOULD);
+                .add(qpHelper.parse(searchQuery, "rights"), Occur.SHOULD)
-        query.add(qpHelper.parse(fullSearchQuery, "content"), Occur.SHOULD);
+                .add(qpHelper.parse(fullSearchQuery, "content"), Occur.SHOULD)
+                .build();
         
         // Search
         DirectoryReader directoryReader = AppContext.getInstance().getIndexingService().getDirectoryReader();
@@ -183,7 +184,7 @@ public class LuceneDao {
         // Extract document IDs
         for (int i = 0; i < docs.length; i++) {
             org.apache.lucene.document.Document document = searcher.doc(docs[i].doc);
-            String type = document.get("type");
+            String type = document.get("doctype");
             String documentId = null;
             if (type.equals("document")) {
                 documentId = document.get("id");
@@ -205,7 +206,7 @@ public class LuceneDao {
     private org.apache.lucene.document.Document getDocumentFromDocument(Document document) {
         org.apache.lucene.document.Document luceneDocument = new org.apache.lucene.document.Document();
         luceneDocument.add(new StringField("id", document.getId(), Field.Store.YES));
-        luceneDocument.add(new StringField("type", "document", Field.Store.YES));
+        luceneDocument.add(new StringField("doctype", "document", Field.Store.YES));
         luceneDocument.add(new TextField("title", document.getTitle(), Field.Store.NO));
         if (document.getDescription() != null) {
             luceneDocument.add(new TextField("description", document.getDescription(), Field.Store.NO));
@@ -248,7 +249,7 @@ public class LuceneDao {
     private org.apache.lucene.document.Document getDocumentFromFile(File file, Document document) {
         org.apache.lucene.document.Document luceneDocument = new org.apache.lucene.document.Document();
         luceneDocument.add(new StringField("id", file.getId(), Field.Store.YES));
-        luceneDocument.add(new StringField("type", "file", Field.Store.YES));
+        luceneDocument.add(new StringField("doctype", "file", Field.Store.YES));
         luceneDocument.add(new StringField("document_id", file.getDocumentId(), Field.Store.YES));
         if (file.getContent() != null) {
             luceneDocument.add(new TextField("content", file.getContent(), Field.Store.NO));

docs-core/src/main/java/com/sismics/docs/core/service/IndexingService.java

@@ -8,7 +8,7 @@ import org.apache.lucene.index.DirectoryReader;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.RAMDirectory;
 import org.apache.lucene.store.SimpleFSDirectory;
-import org.apache.lucene.store.SimpleFSLockFactory;
+import org.apache.lucene.store.SingleInstanceLockFactory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -59,7 +59,7 @@ public class IndexingService extends AbstractScheduledService {
             Path luceneDirectory = DirectoryUtil.getLuceneDirectory();
             log.info("Using file Lucene storage: {}", luceneDirectory);
             try {
-                directory = new SimpleFSDirectory(luceneDirectory.toFile(), new SimpleFSLockFactory());
+                directory = new SimpleFSDirectory(luceneDirectory, new SingleInstanceLockFactory());
             } catch (IOException e) {
                 log.error("Error initializing Lucene index", e);
             }
@@ -127,10 +127,10 @@ public class IndexingService extends AbstractScheduledService {
      */
     public DirectoryReader getDirectoryReader() {
         if (directoryReader == null) {
-            if (!DirectoryReader.indexExists(directory)) {
-                return null;
-            }
             try {
+                if (!DirectoryReader.indexExists(directory)) {
+                    return null;
+                }
                 directoryReader = DirectoryReader.open(directory);
             } catch (IOException e) {
                 log.error("Error creating the directory reader", e);

docs-core/src/main/java/com/sismics/docs/core/util/LuceneUtil.java

@@ -1,16 +1,16 @@
 package com.sismics.docs.core.util;
 
-import com.sismics.docs.core.dao.lucene.DocsStandardAnalyzer;
+import java.io.IOException;
-import com.sismics.docs.core.model.context.AppContext;
+
+import org.apache.lucene.analysis.standard.StandardAnalyzer;
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.index.SerialMergeScheduler;
 import org.apache.lucene.store.Directory;
-import org.apache.lucene.util.Version;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.IOException;
+import com.sismics.docs.core.model.context.AppContext;
 
 /**
  * Lucene utils.
@@ -31,7 +31,7 @@ public class LuceneUtil {
      */
     public static void handle(LuceneRunnable runnable) {
         // Standard analyzer
-        IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_42, new DocsStandardAnalyzer(Version.LUCENE_42));
+        IndexWriterConfig config = new IndexWriterConfig(new StandardAnalyzer());
         
         // Merge sequentially, because Lucene writing is already done asynchronously 
         config.setMergeScheduler(new SerialMergeScheduler());
@@ -45,15 +45,6 @@ public class LuceneUtil {
             log.error("Cannot create IndexWriter", e);
         }
 
-        // Unlock index if needed
-        try {
-            if (IndexWriter.isLocked(directory)) {
-                IndexWriter.unlock(directory);
-            }
-        } catch (IOException e) {
-            log.error("Cannot unlock Lucene directory", e);
-        }
-        
         try {
             runnable.run(indexWriter);
         } catch (Exception e) {

docs-parent/pom.xml

@@ -28,7 +28,7 @@
     <com.h2database.h2.version>1.4.191</com.h2database.h2.version>
     <org.glassfish.jersey.version>2.22.1</org.glassfish.jersey.version>
     <org.mindrot.jbcrypt>0.3m</org.mindrot.jbcrypt>
-    <org.apache.lucene.version>4.2.0</org.apache.lucene.version>
+    <org.apache.lucene.version>5.5.0</org.apache.lucene.version>
     <org.imgscalr.imgscalr-lib.version>4.2</org.imgscalr.imgscalr-lib.version>
     <org.apache.pdfbox.pdfbox.version>2.0.0-RC3</org.apache.pdfbox.pdfbox.version>
     <org.bouncycastle.bcprov-jdk15on.version>1.54</org.bouncycastle.bcprov-jdk15on.version>
@@ -339,12 +339,6 @@
         <version>${org.apache.lucene.version}</version>
       </dependency>
       
-      <dependency>
-        <groupId>org.apache.lucene</groupId>
-        <artifactId>lucene-highlighter</artifactId>
-        <version>${org.apache.lucene.version}</version>
-      </dependency>
-      
       <dependency>
         <groupId>org.imgscalr</groupId>
         <artifactId>imgscalr-lib</artifactId>