Merge pull request #1168 from lucamilanesio/bump-to-lucene-5.5.2

Bump to Lucene 5.5.2

The new code will create Lucene indices in a new directory named after codec and index version.
This provides for easy and safe up- and downgrades. But it also means that the old indices will
stick around on disk. What this version is missing is a kind of "garbage collection" deleting old, unused
indices when they are no longer needed. That task needs to be done manually currently. We should
at leas at some point provide a script for it.

.classpath

@@ -21,13 +21,13 @@
 	<classpathentry kind="lib" path="ext/wicket-1.4.22.jar" sourcepath="ext/src/wicket-1.4.22.jar" />
 	<classpathentry kind="lib" path="ext/wicket-auth-roles-1.4.22.jar" sourcepath="ext/src/wicket-auth-roles-1.4.22.jar" />
 	<classpathentry kind="lib" path="ext/wicket-extensions-1.4.22.jar" sourcepath="ext/src/wicket-extensions-1.4.22.jar" />
-	<classpathentry kind="lib" path="ext/lucene-core-4.10.4.jar" sourcepath="ext/src/lucene-core-4.10.4.jar" />
-	<classpathentry kind="lib" path="ext/lucene-analyzers-common-4.10.4.jar" sourcepath="ext/src/lucene-analyzers-common-4.10.4.jar" />
-	<classpathentry kind="lib" path="ext/lucene-highlighter-4.10.4.jar" sourcepath="ext/src/lucene-highlighter-4.10.4.jar" />
-	<classpathentry kind="lib" path="ext/lucene-memory-4.10.4.jar" sourcepath="ext/src/lucene-memory-4.10.4.jar" />
-	<classpathentry kind="lib" path="ext/lucene-queries-4.10.4.jar" sourcepath="ext/src/lucene-queries-4.10.4.jar" />
-	<classpathentry kind="lib" path="ext/lucene-queryparser-4.10.4.jar" sourcepath="ext/src/lucene-queryparser-4.10.4.jar" />
-	<classpathentry kind="lib" path="ext/lucene-sandbox-4.10.4.jar" sourcepath="ext/src/lucene-sandbox-4.10.4.jar" />
+	<classpathentry kind="lib" path="ext/lucene-core-5.5.2.jar" sourcepath="ext/src/lucene-core-5.5.2.jar" />
+	<classpathentry kind="lib" path="ext/lucene-analyzers-common-5.5.2.jar" sourcepath="ext/src/lucene-analyzers-common-5.5.2.jar" />
+	<classpathentry kind="lib" path="ext/lucene-highlighter-5.5.2.jar" sourcepath="ext/src/lucene-highlighter-5.5.2.jar" />
+	<classpathentry kind="lib" path="ext/lucene-memory-5.5.2.jar" sourcepath="ext/src/lucene-memory-5.5.2.jar" />
+	<classpathentry kind="lib" path="ext/lucene-queries-5.5.2.jar" sourcepath="ext/src/lucene-queries-5.5.2.jar" />
+	<classpathentry kind="lib" path="ext/lucene-queryparser-5.5.2.jar" sourcepath="ext/src/lucene-queryparser-5.5.2.jar" />
+	<classpathentry kind="lib" path="ext/lucene-sandbox-5.5.2.jar" sourcepath="ext/src/lucene-sandbox-5.5.2.jar" />
 	<classpathentry kind="lib" path="ext/jakarta-regexp-1.4.jar" />
 	<classpathentry kind="lib" path="ext/pegdown-1.5.0.jar" sourcepath="ext/src/pegdown-1.5.0.jar" />
 	<classpathentry kind="lib" path="ext/parboiled-java-1.1.7.jar" sourcepath="ext/src/parboiled-java-1.1.7.jar" />

build.moxie

@@ -106,7 +106,7 @@ properties: {
   jetty.version  : 9.2.13.v20150730
   slf4j.version  : 1.7.12
   wicket.version : 1.4.22
-  lucene.version : 4.10.4
+  lucene.version : 5.5.2
   jgit.version   : 4.1.1.201511131810-r
   groovy.version : 2.4.4
   bouncycastle.version : 1.52
@@ -146,9 +146,9 @@ dependencies:
 - compile 'org.apache.wicket:wicket-extensions:${wicket.version}' :war !org.mockito
 - compile 'org.apache.lucene:lucene-core:${lucene.version}' :war :fedclient
 - compile 'org.apache.lucene:lucene-analyzers-common:${lucene.version}' :war :fedclient
-- compile 'org.apache.lucene:lucene-highlighter:${lucene.version}' :war :fedclient
+- compile 'org.apache.lucene:lucene-highlighter:${lucene.version}' :war :fedclient !org.apache.lucene:lucene-join
 - compile 'org.apache.lucene:lucene-memory:${lucene.version}' :war :fedclient
-- compile 'org.apache.lucene:lucene-queryparser:${lucene.version}' :war :fedclient
+- compile 'org.apache.lucene:lucene-queryparser:${lucene.version}' :war :fedclient !org.apache.lucene:lucene-spatial
 - compile 'org.pegdown:pegdown:1.5.0' :war
 - compile 'org.fusesource.wikitext:wikitext-core:${wikitext.version}' :war
 - compile 'org.fusesource.wikitext:twiki-core:${wikitext.version}' :war

gitblit.iml

@@ -180,79 +180,79 @@
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-core-4.10.4.jar">
+      <library name="lucene-core-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-core-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-core-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-core-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-core-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-analyzers-common-4.10.4.jar">
+      <library name="lucene-analyzers-common-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-analyzers-common-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-analyzers-common-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-analyzers-common-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-analyzers-common-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-highlighter-4.10.4.jar">
+      <library name="lucene-highlighter-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-highlighter-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-highlighter-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-highlighter-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-highlighter-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-memory-4.10.4.jar">
+      <library name="lucene-memory-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-memory-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-memory-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-memory-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-memory-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-queries-4.10.4.jar">
+      <library name="lucene-queries-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-queries-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-queries-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-queries-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-queries-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-queryparser-4.10.4.jar">
+      <library name="lucene-queryparser-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-queryparser-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-queryparser-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-queryparser-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-queryparser-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="lucene-sandbox-4.10.4.jar">
+      <library name="lucene-sandbox-5.5.2.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/lucene-sandbox-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/lucene-sandbox-5.5.2.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/lucene-sandbox-4.10.4.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/lucene-sandbox-5.5.2.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>

src/main/java/com/gitblit/service/LuceneRepoIndexStore.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2017 gitblit.com.
+ *
+ * Licensed 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.gitblit.service;
+
+import java.io.File;
+
+import com.gitblit.utils.LuceneIndexStore;
+
+/**
+ * @author Florian Zschocke
+ *
+ * @since 1.9.0
+ */
+class LuceneRepoIndexStore extends LuceneIndexStore
+{
+
+	private static final String LUCENE_DIR = "lucene";
+	private static final String CONF_FILE = "gb_lucene.conf";
+
+
+	/**
+	 * @param repositoryFolder
+	 * 			The directory of the repository for this index
+	 * @param indexVersion
+	 * 			Version of the index definition
+	 */
+	public LuceneRepoIndexStore(File repositoryFolder, int indexVersion) {
+		super(new File(repositoryFolder, LUCENE_DIR), indexVersion);
+	}
+
+
+	/**
+	 * Get the index config File.
+	 *
+	 * @return	The index config File
+	 */
+	public File getConfigFile() {
+		return new File(this.indexFolder, CONF_FILE);
+	}
+
+}

src/main/java/com/gitblit/service/LuceneService.java

@@ -65,7 +65,6 @@ import org.apache.lucene.search.highlight.SimpleHTMLFormatter;
 import org.apache.lucene.search.highlight.SimpleSpanFragmenter;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.FSDirectory;
-import org.apache.lucene.util.Version;
 import org.eclipse.jgit.diff.DiffEntry.ChangeType;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.FileMode;
@@ -118,15 +117,9 @@ public class LuceneService implements Runnable {
 	private static final String FIELD_DATE = "date";
 	private static final String FIELD_TAG = "tag";
 
-	private static final String CONF_FILE = "lucene.conf";
-	private static final String LUCENE_DIR = "lucene";
-	private static final String CONF_INDEX = "index";
-	private static final String CONF_VERSION = "version";
 	private static final String CONF_ALIAS = "aliases";
 	private static final String CONF_BRANCH = "branches";
 
-	private static final Version LUCENE_VERSION = Version.LUCENE_4_10_0;
-
 	private final Logger logger = LoggerFactory.getLogger(LuceneService.class);
 
 	private final IStoredSettings storedSettings;
@@ -267,7 +260,7 @@ public class LuceneService implements Runnable {
 		// close all writers
 		for (String writer : writers.keySet()) {
 			try {
-				writers.get(writer).close(true);
+				writers.get(writer).close();
 			} catch (Throwable t) {
 				logger.error("Failed to close Lucene writer for " + writer, t);
 			}
@@ -293,26 +286,13 @@ public class LuceneService implements Runnable {
 	 * @return true, if successful
 	 */
 	public boolean deleteIndex(String repositoryName) {
-		try {
-			// close any open writer/searcher
-			close(repositoryName);
-
-			// delete the index folder
-			File repositoryFolder = FileKey.resolve(new File(repositoriesFolder, repositoryName), FS.DETECTED);
-			File luceneIndex = new File(repositoryFolder, LUCENE_DIR);
-			if (luceneIndex.exists()) {
-				org.eclipse.jgit.util.FileUtils.delete(luceneIndex,
-						org.eclipse.jgit.util.FileUtils.RECURSIVE);
-			}
-			// delete the config file
-			File luceneConfig = new File(repositoryFolder, CONF_FILE);
-			if (luceneConfig.exists()) {
-				luceneConfig.delete();
-			}
-			return true;
-		} catch (IOException e) {
-			throw new RuntimeException(e);
-		}
+		// close any open writer/searcher
+		close(repositoryName);
+
+		// delete the index folder
+		File repositoryFolder = FileKey.resolve(new File(repositoriesFolder, repositoryName), FS.DETECTED);
+		LuceneRepoIndexStore luceneIndex = new LuceneRepoIndexStore(repositoryFolder, INDEX_VERSION);
+		return luceneIndex.delete();
 	}
 
 	/**
@@ -386,29 +366,20 @@ public class LuceneService implements Runnable {
 	 * @return a config object
 	 */
 	private FileBasedConfig getConfig(Repository repository) {
-		File file = new File(repository.getDirectory(), CONF_FILE);
-		FileBasedConfig config = new FileBasedConfig(file, FS.detect());
+		LuceneRepoIndexStore luceneIndex = new LuceneRepoIndexStore(repository.getDirectory(), INDEX_VERSION);
+		FileBasedConfig config = new FileBasedConfig(luceneIndex.getConfigFile(), FS.detect());
 		return config;
 	}
 
 	/**
-	 * Reads the Lucene config file for the repository to check the index
-	 * version. If the index version is different, then rebuild the repository
-	 * index.
+	 * Checks if an index exists for the repository, that is compatible with
+	 * INDEX_VERSION and the Lucene version.
 	 *
 	 * @param repository
-	 * @return true of the on-disk index format is different than INDEX_VERSION
+	 * @return true if no index is found for the repository, false otherwise.
 	 */
 	private boolean shouldReindex(Repository repository) {
-		try {
-			FileBasedConfig config = getConfig(repository);
-			config.load();
-			int indexVersion = config.getInt(CONF_INDEX, CONF_VERSION, 0);
-			// reindex if versions do not match
-			return indexVersion != INDEX_VERSION;
-		} catch (Throwable t) {
-		}
-		return true;
+		return ! (new LuceneRepoIndexStore(repository.getDirectory(), INDEX_VERSION).hasIndex());
 	}
 
 
@@ -618,7 +589,6 @@ public class LuceneService implements Runnable {
 			reader.close();
 
 			// commit all changes and reset the searcher
-			config.setInt(CONF_INDEX, null, CONF_VERSION, INDEX_VERSION);
 			config.save();
 			writer.commit();
 			resetIndexSearcher(model.name);
@@ -721,10 +691,9 @@ public class LuceneService implements Runnable {
 		String pattern = MessageFormat.format("{0}:'{'0} AND {1}:\"'{'1'}'\" AND {2}:\"'{'2'}'\"", FIELD_OBJECT_TYPE, FIELD_BRANCH, FIELD_PATH);
 		String q = MessageFormat.format(pattern, SearchObjectType.blob.name(), branch, path);
 
-		BooleanQuery query = new BooleanQuery();
-		StandardAnalyzer analyzer = new StandardAnalyzer(LUCENE_VERSION);
-		QueryParser qp = new QueryParser(LUCENE_VERSION, FIELD_SUMMARY, analyzer);
-		query.add(qp.parse(q), Occur.MUST);
+		StandardAnalyzer analyzer = new StandardAnalyzer();
+		QueryParser qp = new QueryParser(FIELD_SUMMARY, analyzer);
+		BooleanQuery query = new BooleanQuery.Builder().add(qp.parse(q), Occur.MUST).build();
 
 		IndexWriter writer = getIndexWriter(repositoryName);
 		int numDocsBefore = writer.numDocs();
@@ -848,7 +817,6 @@ public class LuceneService implements Runnable {
 				}
 
 				// update the config
-				config.setInt(CONF_INDEX, null, CONF_VERSION, INDEX_VERSION);
 				config.setString(CONF_ALIAS, null, keyName, branchName);
 				config.setString(CONF_BRANCH, null, keyName, branch.getObjectId().getName());
 				config.save();
@@ -966,16 +934,13 @@ public class LuceneService implements Runnable {
 	 */
 	private IndexWriter getIndexWriter(String repository) throws IOException {
 		IndexWriter indexWriter = writers.get(repository);
-		File repositoryFolder = FileKey.resolve(new File(repositoriesFolder, repository), FS.DETECTED);
-		File indexFolder = new File(repositoryFolder, LUCENE_DIR);
-		Directory directory = FSDirectory.open(indexFolder);
-
 		if (indexWriter == null) {
-			if (!indexFolder.exists()) {
-				indexFolder.mkdirs();
-			}
-			StandardAnalyzer analyzer = new StandardAnalyzer(LUCENE_VERSION);
-			IndexWriterConfig config = new IndexWriterConfig(LUCENE_VERSION, analyzer);
+			File repositoryFolder = FileKey.resolve(new File(repositoriesFolder, repository), FS.DETECTED);
+			LuceneRepoIndexStore indexStore = new LuceneRepoIndexStore(repositoryFolder, INDEX_VERSION);
+			indexStore.create();
+			Directory directory = FSDirectory.open(indexStore.getPath());
+			StandardAnalyzer analyzer = new StandardAnalyzer();
+			IndexWriterConfig config = new IndexWriterConfig(analyzer);
 			config.setOpenMode(OpenMode.CREATE_OR_APPEND);
 			indexWriter = new IndexWriter(directory, config);
 			writers.put(repository, indexWriter);
@@ -1028,18 +993,18 @@ public class LuceneService implements Runnable {
 			return null;
 		}
 		Set<SearchResult> results = new LinkedHashSet<SearchResult>();
-		StandardAnalyzer analyzer = new StandardAnalyzer(LUCENE_VERSION);
+		StandardAnalyzer analyzer = new StandardAnalyzer();
 		try {
 			// default search checks summary and content
-			BooleanQuery query = new BooleanQuery();
+			BooleanQuery.Builder bldr = new BooleanQuery.Builder();
 			QueryParser qp;
-			qp = new QueryParser(LUCENE_VERSION, FIELD_SUMMARY, analyzer);
+			qp = new QueryParser(FIELD_SUMMARY, analyzer);
 			qp.setAllowLeadingWildcard(true);
-			query.add(qp.parse(text), Occur.SHOULD);
+			bldr.add(qp.parse(text), Occur.SHOULD);
 
-			qp = new QueryParser(LUCENE_VERSION, FIELD_CONTENT, analyzer);
+			qp = new QueryParser(FIELD_CONTENT, analyzer);
 			qp.setAllowLeadingWildcard(true);
-			query.add(qp.parse(text), Occur.SHOULD);
+			bldr.add(qp.parse(text), Occur.SHOULD);
 
 			IndexSearcher searcher;
 			if (repositories.length == 1) {
@@ -1057,10 +1022,11 @@ public class LuceneService implements Runnable {
 				searcher = new IndexSearcher(reader);
 			}
 
+			BooleanQuery query = bldr.build();
 			Query rewrittenQuery = searcher.rewrite(query);
 			logger.debug(rewrittenQuery.toString());
 
-			TopScoreDocCollector collector = TopScoreDocCollector.create(5000, true);
+			TopScoreDocCollector collector = TopScoreDocCollector.create(5000);
 			searcher.search(rewrittenQuery, collector);
 			int offset = Math.max(0, (page - 1) * pageSize);
 			ScoreDoc[] hits = collector.topDocs(offset, pageSize).scoreDocs;
@@ -1225,7 +1191,7 @@ public class LuceneService implements Runnable {
 	 */
 	private class MultiSourceReader extends MultiReader {
 
-		MultiSourceReader(IndexReader [] readers) {
+		MultiSourceReader(IndexReader [] readers) throws IOException {
 			super(readers, false);
 		}
 

src/main/java/com/gitblit/tickets/BranchTicketService.java

@@ -110,9 +110,8 @@ public class BranchTicketService extends ITicketService implements RefsChangedLi
 	}
 
 	@Override
-	public BranchTicketService start() {
+	public void onStart() {
 		log.info("{} started", getClass().getSimpleName());
-		return this;
 	}
 
 	@Override

src/main/java/com/gitblit/tickets/FileTicketService.java

@@ -80,9 +80,8 @@ public class FileTicketService extends ITicketService {
 	}
 
 	@Override
-	public FileTicketService start() {
+	public void onStart() {
 		log.info("{} started", getClass().getSimpleName());
-		return this;
 	}
 
 	@Override

src/main/java/com/gitblit/tickets/ITicketService.java

@@ -181,7 +181,24 @@ public abstract class ITicketService implements IManager {
 	 * @since 1.4.0
 	 */
 	@Override
-	public abstract ITicketService start();
+	public final ITicketService start() {
+		onStart();
+		if (shouldReindex()) {
+			log.info("Re-indexing all tickets...");
+//			long startTime = System.currentTimeMillis();
+			reindex();
+//			float duration = (System.currentTimeMillis() - startTime) / 1000f;
+//			log.info("Built Lucene index over all tickets in {} secs", duration);
+		}
+		return this;
+	}
+
+	/**
+	 * Start the specific ticket service implementation.
+	 *
+	 * @since 1.9.0
+	 */
+	public abstract void onStart();
 
 	/**
 	 * Stop the service.
@@ -196,6 +213,12 @@ public abstract class ITicketService implements IManager {
 		return this;
 	}
 
+	/**
+	 * Closes any open resources used by this service.
+	 * @since 1.4.0
+	 */
+	protected abstract void close();
+
 	/**
 	 * Creates a ticket notifier.  The ticket notifier is not thread-safe!
 	 * @since 1.4.0
@@ -273,12 +296,6 @@ public abstract class ITicketService implements IManager {
 		return indexer.hasTickets(repository);
 	}
 
-	/**
-	 * Closes any open resources used by this service.
-	 * @since 1.4.0
-	 */
-	protected abstract void close();
-
 	/**
 	 * Reset all caches in the service.
 	 * @since 1.4.0
@@ -1343,6 +1360,18 @@ public abstract class ITicketService implements IManager {
 		return indexer.queryFor(query, page, pageSize, sortBy, descending);
 	}
 
+
+	/**
+	 * Checks tickets should get re-indexed.
+	 *
+	 * @return true if tickets should get re-indexed, false otherwise.
+	 */
+	private boolean shouldReindex()
+	{
+		return indexer.shouldReindex();
+	}
+
+
 	/**
 	 * Destroys an existing index and reindexes all tickets.
 	 * This operation may be expensive and time-consuming.

src/main/java/com/gitblit/tickets/NullTicketService.java

@@ -61,9 +61,8 @@ public class NullTicketService extends ITicketService {
 	}
 
 	@Override
-	public NullTicketService start() {
+	public void onStart() {
 		log.info("{} started", getClass().getSimpleName());
-		return this;
 	}
 
 	@Override

src/main/java/com/gitblit/tickets/RedisTicketService.java

@@ -83,12 +83,11 @@ public class RedisTicketService extends ITicketService {
 	}
 
 	@Override
-	public RedisTicketService start() {
+	public void onStart() {
 		log.info("{} started", getClass().getSimpleName());
 		if (!isReady()) {
 			log.warn("{} is not ready!", getClass().getSimpleName());
 		}
-		return this;
 	}
 
 	@Override

src/main/java/com/gitblit/tickets/TicketIndexer.java

@@ -31,6 +31,8 @@ import org.apache.lucene.document.Document;
 import org.apache.lucene.document.Field.Store;
 import org.apache.lucene.document.IntField;
 import org.apache.lucene.document.LongField;
+import org.apache.lucene.document.NumericDocValuesField;
+import org.apache.lucene.document.SortedDocValuesField;
 import org.apache.lucene.document.TextField;
 import org.apache.lucene.index.DirectoryReader;
 import org.apache.lucene.index.IndexWriter;
@@ -49,7 +51,7 @@ import org.apache.lucene.search.TopFieldDocs;
 import org.apache.lucene.search.TopScoreDocCollector;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.FSDirectory;
-import org.apache.lucene.util.Version;
+import org.apache.lucene.util.BytesRef;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -60,7 +62,7 @@ import com.gitblit.models.TicketModel;
 import com.gitblit.models.TicketModel.Attachment;
 import com.gitblit.models.TicketModel.Patchset;
 import com.gitblit.models.TicketModel.Status;
-import com.gitblit.utils.FileUtils;
+import com.gitblit.utils.LuceneIndexStore;
 import com.gitblit.utils.StringUtils;
 
 /**
@@ -108,6 +110,8 @@ public class TicketIndexer {
 		priority(Type.INT),
 		severity(Type.INT);
 
+		final static int INDEX_VERSION = 2;
+
 		final Type fieldType;
 
 		Lucene(Type fieldType) {
@@ -167,16 +171,15 @@ public class TicketIndexer {
 
 	private final Logger log = LoggerFactory.getLogger(getClass());
 
-	private final Version luceneVersion = Version.LUCENE_46;
-
-	private final File luceneDir;
+	private final LuceneIndexStore indexStore;
 
 	private IndexWriter writer;
 
 	private IndexSearcher searcher;
 
 	public TicketIndexer(IRuntimeManager runtimeManager) {
-		this.luceneDir = runtimeManager.getFileOrFolder(Keys.tickets.indexFolder, "${baseFolder}/tickets/lucene");
+		File luceneDir = runtimeManager.getFileOrFolder(Keys.tickets.indexFolder, "${baseFolder}/tickets/lucene");
+		this.indexStore = new LuceneIndexStore(luceneDir, Lucene.INDEX_VERSION);
 	}
 
 	/**
@@ -192,7 +195,7 @@ public class TicketIndexer {
 	 */
 	public void deleteAll() {
 		close();
-		FileUtils.delete(luceneDir);
+		indexStore.delete();
 	}
 
 	/**
@@ -201,10 +204,9 @@ public class TicketIndexer {
 	public boolean deleteAll(RepositoryModel repository) {
 		try {
 			IndexWriter writer = getWriter();
-			StandardAnalyzer analyzer = new StandardAnalyzer(luceneVersion);
-			QueryParser qp = new QueryParser(luceneVersion, Lucene.rid.name(), analyzer);
-			BooleanQuery query = new BooleanQuery();
-			query.add(qp.parse(repository.getRID()), Occur.MUST);
+			StandardAnalyzer analyzer = new StandardAnalyzer();
+			QueryParser qp = new QueryParser(Lucene.rid.name(), analyzer);
+			BooleanQuery query = new BooleanQuery.Builder().add(qp.parse(repository.getRID()), Occur.MUST).build();
 
 			int numDocsBefore = writer.numDocs();
 			writer.deleteDocuments(query);
@@ -224,6 +226,18 @@ public class TicketIndexer {
 		return false;
 	}
 
+	/**
+	 * Checks if a tickets index exists, that is compatible with Lucene.INDEX_VERSION
+	 * and the Lucene codec version.
+	 *
+	 * @return true if no tickets index is found, false otherwise.
+	 *
+	 * @since 1.9.0
+	 */
+	boolean shouldReindex() {
+		return ! this.indexStore.hasIndex();
+	}
+
 	/**
 	 * Bulk Add/Update tickets in the Lucene index
 	 *
@@ -287,10 +301,9 @@ public class TicketIndexer {
 	 * @return true, if deleted, false if no record was deleted
 	 */
 	private boolean delete(String repository, long ticketId, IndexWriter writer) throws Exception {
-		StandardAnalyzer analyzer = new StandardAnalyzer(luceneVersion);
-		QueryParser qp = new QueryParser(luceneVersion, Lucene.did.name(), analyzer);
-		BooleanQuery query = new BooleanQuery();
-		query.add(qp.parse(StringUtils.getSHA1(repository + ticketId)), Occur.MUST);
+		StandardAnalyzer analyzer = new StandardAnalyzer();
+		QueryParser qp = new QueryParser(Lucene.did.name(), analyzer);
+		BooleanQuery query = new BooleanQuery.Builder().add(qp.parse(StringUtils.getSHA1(repository + ticketId)), Occur.MUST).build();
 
 		int numDocsBefore = writer.numDocs();
 		writer.deleteDocuments(query);
@@ -331,30 +344,30 @@ public class TicketIndexer {
 			return Collections.emptyList();
 		}
 		Set<QueryResult> results = new LinkedHashSet<QueryResult>();
-		StandardAnalyzer analyzer = new StandardAnalyzer(luceneVersion);
+		StandardAnalyzer analyzer = new StandardAnalyzer();
 		try {
 			// search the title, description and content
-			BooleanQuery query = new BooleanQuery();
+			BooleanQuery.Builder bldr = new BooleanQuery.Builder();
 			QueryParser qp;
 
-			qp = new QueryParser(luceneVersion, Lucene.title.name(), analyzer);
+			qp = new QueryParser(Lucene.title.name(), analyzer);
 			qp.setAllowLeadingWildcard(true);
-			query.add(qp.parse(text), Occur.SHOULD);
+			bldr.add(qp.parse(text), Occur.SHOULD);
 
-			qp = new QueryParser(luceneVersion, Lucene.body.name(), analyzer);
+			qp = new QueryParser(Lucene.body.name(), analyzer);
 			qp.setAllowLeadingWildcard(true);
-			query.add(qp.parse(text), Occur.SHOULD);
+			bldr.add(qp.parse(text), Occur.SHOULD);
 
-			qp = new QueryParser(luceneVersion, Lucene.content.name(), analyzer);
+			qp = new QueryParser(Lucene.content.name(), analyzer);
 			qp.setAllowLeadingWildcard(true);
-			query.add(qp.parse(text), Occur.SHOULD);
+			bldr.add(qp.parse(text), Occur.SHOULD);
 
 			IndexSearcher searcher = getSearcher();
-			Query rewrittenQuery = searcher.rewrite(query);
+			Query rewrittenQuery = searcher.rewrite(bldr.build());
 
 			log.debug(rewrittenQuery.toString());
 
-			TopScoreDocCollector collector = TopScoreDocCollector.create(5000, true);
+			TopScoreDocCollector collector = TopScoreDocCollector.create(5000);
 			searcher.search(rewrittenQuery, collector);
 			int offset = Math.max(0, (page - 1) * pageSize);
 			ScoreDoc[] hits = collector.topDocs(offset, pageSize).scoreDocs;
@@ -392,9 +405,9 @@ public class TicketIndexer {
 		}
 
 		Set<QueryResult> results = new LinkedHashSet<QueryResult>();
-		StandardAnalyzer analyzer = new StandardAnalyzer(luceneVersion);
+		StandardAnalyzer analyzer = new StandardAnalyzer();
 		try {
-			QueryParser qp = new QueryParser(luceneVersion, Lucene.content.name(), analyzer);
+			QueryParser qp = new QueryParser(Lucene.content.name(), analyzer);
 			Query query = qp.parse(queryText);
 
 			IndexSearcher searcher = getSearcher();
@@ -409,7 +422,7 @@ public class TicketIndexer {
 				sort = new Sort(Lucene.fromString(sortBy).asSortField(desc));
 			}
 			int maxSize = 5000;
-			TopFieldDocs docs = searcher.search(rewrittenQuery, null, maxSize, sort, false, false);
+			TopFieldDocs docs = searcher.search(rewrittenQuery, maxSize, sort, false, false);
 			int size = (pageSize <= 0) ? maxSize : pageSize;
 			int offset = Math.max(0, (page - 1) * size);
 			ScoreDoc[] hits = subset(docs.scoreDocs, offset, size);
@@ -443,14 +456,11 @@ public class TicketIndexer {
 
 	private IndexWriter getWriter() throws IOException {
 		if (writer == null) {
-			Directory directory = FSDirectory.open(luceneDir);
-
-			if (!luceneDir.exists()) {
-				luceneDir.mkdirs();
-			}
+			indexStore.create();
 
-			StandardAnalyzer analyzer = new StandardAnalyzer(luceneVersion);
-			IndexWriterConfig config = new IndexWriterConfig(luceneVersion, analyzer);
+			Directory directory = FSDirectory.open(indexStore.getPath());
+			StandardAnalyzer analyzer = new StandardAnalyzer();
+			IndexWriterConfig config = new IndexWriterConfig(analyzer);
 			config.setOpenMode(OpenMode.CREATE_OR_APPEND);
 			writer = new IndexWriter(directory, config);
 		}
@@ -554,14 +564,17 @@ public class TicketIndexer {
 			return;
 		}
 		doc.add(new LongField(lucene.name(), value.getTime(), Store.YES));
+		doc.add(new NumericDocValuesField(lucene.name(), value.getTime()));
 	}
 
 	private void toDocField(Document doc, Lucene lucene, long value) {
 		doc.add(new LongField(lucene.name(), value, Store.YES));
+		doc.add(new NumericDocValuesField(lucene.name(), value));
 	}
 
 	private void toDocField(Document doc, Lucene lucene, int value) {
 		doc.add(new IntField(lucene.name(), value, Store.YES));
+		doc.add(new NumericDocValuesField(lucene.name(), value));
 	}
 
 	private void toDocField(Document doc, Lucene lucene, String value) {
@@ -569,6 +582,7 @@ public class TicketIndexer {
 			return;
 		}
 		doc.add(new org.apache.lucene.document.Field(lucene.name(), value, TextField.TYPE_STORED));
+		doc.add(new SortedDocValuesField(lucene.name(), new BytesRef(value)));
 	}
 
 	/**
@@ -663,4 +677,4 @@ public class TicketIndexer {
 		int i = Integer.parseInt(val);
 		return i;
 	}
-}
+}

src/main/java/com/gitblit/utils/LuceneIndexStore.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2017 gitblit.com.
+ *
+ * Licensed 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.gitblit.utils;
+
+import java.io.File;
+import java.nio.file.Path;
+
+/**
+ * @author Florian Zschocke
+ *
+ * @since 1.9.0
+ */
+public class LuceneIndexStore
+{
+
+	public static final int LUCENE_CODEC_VERSION = 54;
+
+	protected File indexFolder;
+
+	/**
+	 * Constructor for a base folder that contains the version specific index folders
+	 * and an index version.
+	 *
+	 * @param luceneFolder
+	 * 			Path to the base folder for the Lucene indices, i.e. the common "lucene" directory.
+	 * @param indexVersion
+	 * 			Version of the index definition
+	 */
+	public LuceneIndexStore(File luceneFolder, int indexVersion)
+	{
+		this.indexFolder = new File(luceneFolder, indexVersion + "_" + LUCENE_CODEC_VERSION);
+	}
+
+
+
+	/**
+	 * Create the Lucene index directory for this index version and Lucene codec version
+	 */
+	public void create()
+	{
+		if (! indexFolder.exists()) {
+			indexFolder.mkdirs();
+		}
+	}
+
+
+	/**
+	 * Delete the Lucene index directory for this index version and Lucene codec version
+	 *
+	 * @return	True if the directory could successfully be deleted.
+	 */
+	public boolean delete()
+	{
+		if (indexFolder.exists()) {
+			return FileUtils.delete(indexFolder);
+		}
+		return true;
+	}
+
+
+
+	/**
+	 * @return	The Path to the index folder
+	 */
+	public Path getPath()
+	{
+		return indexFolder.toPath();
+	}
+
+
+
+	/**
+	 * Check if an index of the respective version, or compatible, already exists.
+	 *
+	 * @return	True if an index exists, False otherwise
+	 */
+	public boolean hasIndex()
+	{
+		return indexFolder.exists() &&
+				indexFolder.isDirectory() &&
+				(indexFolder.list().length > 1);  // Must have more than 'write.lock'
+	}
+
+}

src/main/java/com/gitblit/wicket/GitBlitWebApp.properties

@@ -218,7 +218,8 @@ gb.pages = pages
 gb.workingCopy = working copy
 gb.workingCopyWarning = this repository has a working copy and can not receive pushes
 gb.query = query
-gb.queryHelp = Standard query syntax is supported.<p/><p/>Please see <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> for details.
+gb.queryHelp = Standard query syntax is supported.<p/><p/>Please see ${querySyntax} for details.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = results {0} - {1} ({2} hits)
 gb.noHits = no hits
 gb.authored = authored

src/main/java/com/gitblit/wicket/GitBlitWebApp_cs.properties

@@ -773,7 +773,8 @@ gb.transportPreferenceDescription=Vyberte transport, kter\u00fd preferujete pro
 gb.sortHighestSeverity=nejvy\u0161\u0161\u00ed z\u00e1va\u017enost
 gb.diffFileDiffTooLarge=Rozd\u00edl je p\u0159\u00edli\u0161 velk\u00fd
 gb.missingIntegrationBranchMore=C\u00edlov\u00e1 integra\u010dn\u00ed v\u011btev v repozit\u00e1\u0159i neexistuje!
-gb.queryHelp=Standardn\u00ed syntaxe dotaz\u016f je podporov\u00e1na.<p/><p/>Pod\u00edvejte se pros\u00edm na <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> pro detaily.
+gb.queryHelp=Standardn\u00ed syntaxe dotaz\u016f je podporov\u00e1na.<p/><p/>Pod\u00edvejte se pros\u00edm na ${querySyntax} pro detaily.
+gb.querySyntax=Lucene Query Parser Syntax
 gb.diffTruncated=Diff o\u0159iznut po p\u0159edchoz\u00edm souboru
 gb.blame=blame
 gb.imgdiffSubtract=Od\u010d\u00edtat (\u010dern\u00e1 = stejn\u00e9l)

src/main/java/com/gitblit/wicket/GitBlitWebApp_de.properties

@@ -218,7 +218,8 @@ gb.pages = Seiten
 gb.workingCopy = Arbeitskopie
 gb.workingCopyWarning = Dieses Repository besitzt eine Arbeitskopie und kann keine Pushes empfangen
 gb.query = Abfrage
-gb.queryHelp = Standard Abfragesyntax wird unterst\u00fctzt.<p/><p/>Unter <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> finden Sie weitere Details.
+gb.queryHelp = Standard Abfragesyntax wird unterst\u00fctzt.<p/><p/>Unter ${querySyntax} finden Sie weitere Details.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = Ergebnisse {0} - {1} ({2} Treffer)
 gb.noHits = Keine Treffer
 gb.authored = ist Autor von

src/main/java/com/gitblit/wicket/GitBlitWebApp_es.properties

@@ -218,7 +218,8 @@ gb.pages = P\u00E1ginas
 gb.workingCopy = Copia de trabajo
 gb.workingCopyWarning = Este repositorio tiene una copia de trabajo y no se le puede empujar
 gb.query = Consulta
-gb.queryHelp = Se admite la sintaxis de consulta est\u00E1ndar.<p/>Por favor, lee el: <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Analizador sint\u00E1ctico de consultas de Lucene</a> para m\u00E1s detalles.
+gb.queryHelp = Se admite la sintaxis de consulta est\u00E1ndar.<p/>Por favor, lee el: ${querySyntax} para m\u00E1s detalles.
+gb.querySyntax = Analizador sint\u00E1ctico de consultas de Lucene
 gb.queryResults = Resultados {0} - {1} ({2} coincidencias)
 gb.noHits = Sin coincidencias
 gb.authored = Autor

src/main/java/com/gitblit/wicket/GitBlitWebApp_fr.properties

@@ -218,7 +218,8 @@ gb.pages = pages
 gb.workingCopy = d\u00e9p\u00f4t de travail
 gb.workingCopyWarning = ce d\u00e9p\u00f4t poss\u00e8de un d\u00e9p\u00f4t de travail et ne peut donc pas recevoir de pushes
 gb.query = recherche
-gb.queryHelp = La syntaxe Lucene standard est support\u00e9e.<p/><p/>Se r\u00e9f\u00e9rer \u00e0 la <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Syntaxe de recherche Lucene</a> pour plus de d\u00e9tails.
+gb.queryHelp = La syntaxe Lucene standard est support\u00e9e.<p/><p/>Se r\u00e9f\u00e9rer \u00e0 la ${querySyntax} pour plus de d\u00e9tails.
+gb.querySyntax = Syntaxe de recherche Lucene
 gb.queryResults = r\u00e9sultats {0} - {1} ({2} hits)
 gb.noHits = aucun r\u00e9sultats
 gb.authored = authored

src/main/java/com/gitblit/wicket/GitBlitWebApp_it.properties

@@ -218,7 +218,8 @@ gb.pages = pagine
 gb.workingCopy = copia di lavoro
 gb.workingCopyWarning = questo repository è una copia di lavoro a non ammette push
 gb.query = interrogazione
-gb.queryHelp = La sintassi standard è supportata.<p/><p/>Si vedi <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> per ulteriori dettagli.
+gb.queryHelp = La sintassi standard è supportata.<p/><p/>Si vedi ${querySyntax} per ulteriori dettagli.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = risultati {0} - {1} ({2} corrispondenze)
 gb.noHits = nessuna corrispondenza
 gb.authored = creato da

src/main/java/com/gitblit/wicket/GitBlitWebApp_ja.properties

@@ -217,7 +217,8 @@ gb.pages = \u30da\u30fc\u30b8
 gb.workingCopy = \u4f5c\u696d\u30b3\u30d4\u30fc
 gb.workingCopyWarning = \u3053\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u306f\u4f5c\u696d\u30b3\u30d4\u30fc\u304c\u3042\u308b\u305f\u3081 push \u3067\u304d\u307e\u305b\u3093
 gb.query = \u30af\u30a8\u30ea\u30fc
-gb.queryHelp = \u6a19\u6e96\u7684\u306a\u30af\u30a8\u30ea\u30fc\u66f8\u5f0f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<p/><p/>\u8a73\u7d30\u306f <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> \u3092\u53c2\u7167\u3057\u3066\u4e0b\u3055\u3044\u3002
+gb.queryHelp = \u6a19\u6e96\u7684\u306a\u30af\u30a8\u30ea\u30fc\u66f8\u5f0f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<p/><p/>\u8a73\u7d30\u306f ${querySyntax} \u3092\u53c2\u7167\u3057\u3066\u4e0b\u3055\u3044\u3002
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = \u691c\u7d22\u7d50\u679c {0} - {1} ({2} \u30d2\u30c3\u30c8)
 gb.noHits = \u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002
 gb.authored = authored

src/main/java/com/gitblit/wicket/GitBlitWebApp_ko.properties

@@ -180,110 +180,111 @@ gb.free = \uD504\uB9AC
 gb.version = \uBC84\uC804
 gb.releaseDate = \uB9B4\uB9AC\uC988 \uB0A0\uC9DC
 gb.date = date
-gb.activity = \uC561\uD2F0\uBE44\uD2F0
-gb.subscribe = \uAD6C\uB3C5
-gb.branch = \uBE0C\uB79C\uCE58
-gb.maxHits = \uB9E5\uC2A4\uD788\uD2B8
-gb.recentActivity = \uCD5C\uADFC \uC561\uD2F0\uBE44\uD2F0
-gb.recentActivityStats = \uC9C0\uB09C {0}\uC77C / \uC791\uC131\uC790 {2}\uBA85\uC774 {1}\uAC1C \uCEE4\uBC0B\uD568
-gb.recentActivityNone = \uC9C0\uB09C {0}\uC77C / \uC5C6\uC74C
-gb.dailyActivity = \uC77C\uC77C \uC561\uD2F0\uBE44\uD2F0
-gb.activeRepositories = \uC0AC\uC6A9\uC911\uC778 \uC800\uC7A5\uC18C
-gb.activeAuthors = \uC0AC\uC6A9\uC911\uC778 \uC791\uC131\uC790
-gb.commits = \uCEE4\uBC0B
-gb.teams = \uD300
-gb.teamName = \uD300 \uC774\uB984
-gb.teamMembers = \uD300 \uBA64\uBC84
-gb.teamMemberships = \uD300 \uB9F4\uBC84\uC27D
-gb.newTeam = \uC0C8\uB85C\uC6B4 \uD300
-gb.permittedTeams = \uD5C8\uC6A9\uB41C \uD300
-gb.emptyRepository = \uBE48 \uC800\uC7A5\uC18C
-gb.repositoryUrl = \uC800\uC7A5\uC18C url
-gb.mailingLists = \uBA54\uC77C\uB9C1 \uB9AC\uC2A4\uD2B8
-gb.preReceiveScripts = pre-receive \uC2A4\uD06C\uB9BD\uD2B8
-gb.postReceiveScripts = post-receive \uC2A4\uD06C\uB9BD\uD2B8
-gb.hookScripts = \uD6C4\uD06C \uC2A4\uD06C\uB9BD\uD2B8
-gb.customFields = \uC0AC\uC6A9\uC790 \uD544\uB4DC
-gb.customFieldsDescription = \uADF8\uB8E8\uBE44 \uD6C5\uC5D0 \uC0AC\uC6A9\uC790 \uD544\uB4DC \uC0AC\uC6A9 \uAC00\uB2A5
-gb.accessPermissions = \uC811\uC18D \uAD8C\uD55C
-gb.filters = \uD544\uD130
-gb.generalDescription = \uC77C\uBC18 \uC124\uC815
-gb.accessPermissionsDescription = \uC720\uC800\uC640 \uD300\uC73C\uB85C \uC811\uC18D\uAD8C\uD55C \uBD80\uC5EC
-gb.accessPermissionsForUserDescription = \uD300\uC744 \uC9C0\uC815\uD558\uAC70\uB098 \uC811\uC18D \uAD8C\uD55C\uC744 \uC9C0\uC815\uD560 \uC800\uC7A5\uC18C \uC120\uD0DD
-gb.accessPermissionsForTeamDescription = \uD300 \uB9F4\uBC84\uB97C \uC120\uD0DD\uD558\uACE0, \uC811\uC18D \uAD8C\uD55C\uC744 \uC9C0\uC815\uD560 \uC800\uC7A5\uC18C \uC120\uD0DD
-gb.federationRepositoryDescription = \uC774 \uC800\uC7A5\uC18C\uB97C \uB2E4\uB978 Gitblit \uC11C\uBC84\uC640 \uACF5\uC720
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+gb.teamNameUnavailable = ''{0}'' \ud300\uc740 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uc5b4\uc694.
+gb.teamMustSpecifyRepository = \ud300\uc740 \uc801\uc5b4\ub3c4 \ud558\ub098\uc758 \uc800\uc7a5\uc18c\ub97c \uc9c0\uc815\ud574\uc57c \ud569\ub2c8\ub2e4.
+gb.teamCreated = \uc0c8\ub85c\uc6b4 \ud300 ''{0}'' \uc0dd\uc131 \uc644\ub8cc.
+gb.pleaseSetUsername = \uc720\uc800\ub124\uc784\uc744 \uc785\ub825\ud558\uc138\uc694!
+gb.usernameUnavailable = ''{0}'' \uc720\uc800\ub124\uc784\uc740 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uc5b4\uc694.
+gb.combinedMd5Rename = Gitblit \uc740 combined-md5 \ud574\uc2f1 \ud328\uc2a4\uc6cc\ub4dc\ub85c \uc124\uc815\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uacc4\uc815 \uc774\ub984 \ubcc0\uacbd \uc2dc \uc0c8 \ud328\uc2a4\uc6cc\ub4dc\ub97c \uc785\ub825\ud574\uc57c \ud569\ub2c8\ub2e4.
+gb.userCreated = \uc0c8\ub85c\uc6b4 \uc720\uc800 ''{0}'' \uc0dd\uc131 \uc644\ub8cc.
+gb.couldNotFindFederationRegistration = \ud398\ub354\ub808\uc774\uc158 \ub4f1\ub85d\uc744 \ucc3e\uc744 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4!
+gb.failedToFindGravatarProfile = {0} \uc758 Gravatar \ud504\ub85c\ud30c\uc77c \ucc3e\uae30 \uc2e4\ud328
+gb.branchStats = {2} \uc548\uc5d0 {0} \ucee4\ubc0b {1} \ud0dc\uadf8
+gb.repositoryNotSpecified = \uc800\uc7a5\uc18c\uac00 \uc9c0\uc815\ub418\uc9c0 \uc54a\uc74c!
+gb.repositoryNotSpecifiedFor = {0} \ub97c \uc704\ud55c \uc800\uc7a5\uc18c\uac00 \uc9c0\uc815\ub418\uc9c0 \uc54a\uc74c!
+gb.canNotLoadRepository = \uc800\uc7a5\uc18c\ub97c \ubd88\ub7ec\uc62c \uc218 \uc5c6\uc74c
+gb.commitIsNull = \ub110 \ucee4\ubc0b
+gb.unauthorizedAccessForRepository = \uc800\uc7a5\uc18c\uc5d0 \uc811\uadfc \ud5c8\uc6a9\ub418\uc9c0 \uc54a\uc74c
+gb.failedToFindCommit = \ucee4\ubc0b\uc744 \ucc3e\uc744 \uc218 \uc5c6\uc74c \"{0}\" in {1} for {2} \ud398\uc774\uc9c0!
+gb.couldNotFindFederationProposal = \ud398\ub354\ub808\uc774\uc158 \uc81c\uc548\uc744 \ucc3e\uc744 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4!
+gb.invalidUsernameOrPassword = \uc798\ubabb\ub41c \uc720\uc800\ub124\uc784 \ub610\ub294 \ud328\uc2a4\uc6cc\ub4dc!
+gb.OneProposalToReview = \uac80\ud1a0\ub97c \uae30\ub2e4\ub9ac\uace0 \uc788\ub294 1\uac1c\uc758 \ud398\ub354\ub808\uc774\uc158 \uc81c\uc548\uc774 \uc788\uc2b5\ub2c8\ub2e4.
+gb.nFederationProposalsToReview = \uac80\ud1a0\ub97c \uae30\ub2e4\ub9ac\uace0 \uc788\ub294 {0} \uac1c\uc758 \ud398\ub354\ub808\uc774\uc158 \uc81c\uc548\uc774 \uc788\uc2b5\ub2c8\ub2e4.
+gb.couldNotFindTag = \ud0dc\uadf8 {0} \ub97c(\uc744) \ucc3e\uc744 \uc218 \uc5c6\uc74c
+gb.couldNotCreateFederationProposal = \ud398\ub354\ub808\uc774\uc158 \uc81c\uc548 \uc0dd\uc131 \uc2e4\ud328!
+gb.pleaseSetGitblitUrl = Gitblit url \uc744 \uc785\ub825\ud558\uc138\uc694!
+gb.pleaseSetDestinationUrl = \ub2f9\uc2e0\uc758 \uc81c\uc548\uc5d0 \ub300\ud55c \ub300\uc0c1 url \uc744 \uc785\ub825\ud558\uc138\uc694!
+gb.proposalReceived = {0} \uc758 \uc81c\uc548 \uc131\uacf5\uc801 \uc218\uc2e0
+gb.noGitblitFound = \uc8c4\uc1a1\ud569\ub2c8\ub2e4, Gitblit \uc778\uc2a4\ud134\uc2a4 {1} \uc5d0\uc11c {0} \ub97c \ucc3e\uc744 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.
+gb.noProposals = \uc8c4\uc1a1\ud569\ub2c8\ub2e4, \uc774\ubc88\uc5d0\ub294 {0} \uc758 \uc81c\uc548\uc744 \uc218\uc6a9\ud558\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4.
+gb.noFederation = \uc8c4\uc1a1\ud569\ub2c8\ub2e4, {0} \uc5d0\ub294 \ud398\ub354\ub808\uc774\uc158 \uc124\uc815\ub41c Gitblit \uc778\uc2a4\ud134\uc2a4\uac00 \uc5c6\uc2b5\ub2c8\ub2e4.
+gb.proposalFailed = \uc8c4\uc1a1\ud569\ub2c8\ub2e4, {0} \uc5d0\ub294 \uc81c\uc548 \ub370\uc774\ud130\ub97c \ubc1b\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4.
+gb.proposalError = \uc8c4\uc1a1\ud569\ub2c8\ub2e4, {0} \uc5d0 \ub300\ud55c \uc624\ub958 \ubc1c\uc0dd \ubcf4\uace0
+gb.failedToSendProposal = \uc81c\uc548 \ubcf4\ub0b4\uae30 \uc2e4\ud328!
+gb.userServiceDoesNotPermitAddUser = {0} \uc0c8\ub85c\uc6b4 \uc720\uc800\ub97c \ucd94\uac00\ud560 \uc218 \uc5c6\uc74c!
+gb.userServiceDoesNotPermitPasswordChanges = {0} \ud328\uc2a4\uc6cc\ub4dc\ub97c \ubcc0\uacbd\ud560 \uc218 \uc5c6\uc74c!
+gb.displayName = \ud45c\uc2dc\ub418\ub294 \uc774\ub984
+gb.emailAddress = \uc774\uba54\uc77c \uc8fc\uc18c
+gb.errorAdminLoginRequired = \uad00\ub9ac\ub97c \uc704\ud574\uc11c\ub294 \ub85c\uadf8\uc778\uc774 \ud544\uc694
+gb.errorOnlyAdminMayCreateRepository = \uad00\ub9ac\uc790\ub9cc \uc800\uc7a5\uc18c\ub97c \ub9cc\ub4e4\uc218 \uc788\uc74c
+gb.errorOnlyAdminOrOwnerMayEditRepository = \uad00\ub9ac\uc790\uc640 \uc18c\uc720\uc790\ub9cc \uc800\uc7a5\uc18c\ub97c \uc218\uc815\ud560 \uc218 \uc788\uc74c
+gb.errorAdministrationDisabled = \uad00\ub9ac\uae30\ub2a5 \ube44\ud65c\uc131\ud654\ub428
+gb.lastNDays = {0} \uc77c\uc804
+gb.completeGravatarProfile = Gravatar.com \uc5d0 \ud504\ub85c\ud30c\uc77c \uc0dd\uc131\ub428
 gb.none = none
 gb.line = \uB77C\uC778
 gb.content = \uB0B4\uC6A9
@@ -782,4 +783,4 @@ gb.deletePatchset = {0} \uD328\uCE58\uC14B \uC0AD\uC81C
 gb.deletePatchsetSuccess = {0} \uD328\uCE58\uC14B\uC774 \uC0AD\uC81C\uB418\uC5C8\uC5B4\uC694.
 gb.deletePatchsetFailure = {0} \uD328\uCE58\uC14B \uC0AD\uC81C \uC624\uB958.
 gb.referencedByCommit = \uCEE4\uBC0B\uC5D0 \uCC38\uC870\uB428.
-gb.referencedByTicket = \uD2F0\uCF13\uC5D0 \uCC38\uC870\uB428.
+gb.referencedByTicket = \uD2F0\uCF13\uC5D0 \uCC38\uC870\uB428.

src/main/java/com/gitblit/wicket/GitBlitWebApp_nl.properties

@@ -218,7 +218,8 @@ gb.pages = paginas
 gb.workingCopy = werkkopie
 gb.workingCopyWarning = deze repositorie heeft een werkkopie en kan geen pushes ontvangen
 gb.query = query
-gb.queryHelp = Standaard query syntax wordt ondersteund.<p/><p/>Zie aub <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> voor informatie.
+gb.queryHelp = Standaard query syntax wordt ondersteund.<p/><p/>Zie aub ${querySyntax} voor informatie.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = resultaten {0} - {1} ({2} hits)
 gb.noHits = geen hits
 gb.authored = geschreven

src/main/java/com/gitblit/wicket/GitBlitWebApp_no.properties

@@ -218,7 +218,8 @@ gb.pages = sider
 gb.workingCopy = arbeidskopi
 gb.workingCopyWarning = dette repositoriet har en arbeidskopi, og kan ikke pushes til.
 gb.query = sp\u00F8rring
-gb.queryHelp = Standard lucene sp\u00F8rringssyntaks st\u00F8ttes.<p/><p/>Se <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> for mer info.
+gb.queryHelp = Standard lucene sp\u00F8rringssyntaks st\u00F8ttes.<p/><p/>Se ${querySyntax} for mer info.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = resultater {0} - {1} ({2} treff)
 gb.noHits = ingen treff
 gb.authored = forfattet

src/main/java/com/gitblit/wicket/GitBlitWebApp_pl.properties

@@ -217,7 +217,8 @@ gb.pages = Strony
 gb.workingCopy = Kopia robocza
 gb.workingCopyWarning = To repozytorium ma kopi\u0119 robocz\u0105 i nie mo\u017Ce otrzymywa\u0107 zmian
 gb.query = Szukaj
-gb.queryHelp = Standardowa sk\u0142adnia wyszukiwa\u0144 jest wspierana.<p/><p/>Na stronie <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> dost\u0119pne s\u0105 dalsze szczeg\u00F3\u0142y.
+gb.queryHelp = Standardowa sk\u0142adnia wyszukiwa\u0144 jest wspierana.<p/><p/>Na stronie ${querySyntax} dost\u0119pne s\u0105 dalsze szczeg\u00F3\u0142y.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = Wyniki {0} - {1} ({2} wynik\u00F3w)
 gb.noHits = Brak wynik\u00F3w
 gb.authored = utworzy\u0142

src/main/java/com/gitblit/wicket/GitBlitWebApp_pt_BR.properties

@@ -217,7 +217,8 @@ gb.pages = p
 gb.workingCopy = working copy
 gb.workingCopyWarning = este repositório tem uma working copy e não pode receber pushes
 gb.query = query
-gb.queryHelp =  Standard query syntax é suportada.<p/><p/>Por favor veja <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a> para mais detalhes.
+gb.queryHelp = Standard query syntax é suportada.<p/><p/>Por favor veja ${querySyntax} para mais detalhes.
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = resultados {0} - {1} ({2} hits)
 gb.noHits = sem hits
 gb.authored = foi autor de

src/main/java/com/gitblit/wicket/GitBlitWebApp_zh_CN.properties

@@ -218,7 +218,8 @@ gb.pages = \u9875\u9762
 gb.workingCopy = \u5de5\u4f5c\u526f\u672c
 gb.workingCopyWarning = \u6b64\u7248\u672c\u5e93\u5b58\u5728\u4e00\u4efd\u5de5\u4f5c\u526f\u672c\uff0c\u65e0\u6cd5\u8fdb\u884c\u63a8\u9001
 gb.query = \u67e5\u8be2
-gb.queryHelp = \u652f\u6301\u6807\u51c6\u67e5\u8be2\u683c\u5f0f.<p/><p/>\u8bf7\u67e5\u770b <a target="_new" href="http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene \u67e5\u8be2\u5904\u7406\u5668\u683c\u5f0f</a> \u4ee5\u83b7\u53d6\u8be6\u7ec6\u5185\u5bb9\u3002
+gb.queryHelp = \u652f\u6301\u6807\u51c6\u67e5\u8be2\u683c\u5f0f.<p/><p/>\u8bf7\u67e5\u770b ${querySyntax} \u4ee5\u83b7\u53d6\u8be6\u7ec6\u5185\u5bb9\u3002
+gb.querySyntax = Lucene \u67e5\u8be2\u5904\u7406\u5668\u683c\u5f0f
 gb.queryResults = \u7ed3\u679c {0} - {1} ({2} \u6b21\u547d\u4e2d)
 gb.noHits = \u672a\u547d\u4e2d
 gb.authored = authored

src/main/java/com/gitblit/wicket/GitBlitWebApp_zh_TW.properties

@@ -219,7 +219,8 @@ gb.pages = \u6587\u4ef6
 gb.workingCopy = \u66ab\u5b58\u8907\u672c
 gb.workingCopyWarning = \u8a72\u7248\u672c\u5eab\u4ecd\u6709\u66ab\u5b58\u8907\u672c,\u56e0\u6b64\u7121\u6cd5\u63a5\u53d7\u63a8\u9001(push)
 gb.query = \u67e5\u8a62
-gb.queryHelp = \u652f\u63f4\u6a19\u6e96\u67e5\u8a62\u8a9e\u6cd5.<p/><p/>\u8a73\u60c5\u8acb\u53c3\u8003 <a target\ = "_new" href\ = "http\://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/queryparsersyntax.html">Lucene Query Parser Syntax</a>
+gb.queryHelp = \u652f\u63f4\u6a19\u6e96\u67e5\u8a62\u8a9e\u6cd5.<p/><p/>\u8a73\u60c5\u8acb\u53c3\u8003 ${querySyntax}
+gb.querySyntax = Lucene Query Parser Syntax
 gb.queryResults = \u7d50\u679c {0} - {1} ({2} \u67e5\u8a62)
 gb.noHits = \u7121\u9ede\u64ca
 gb.authored = \u6388\u6b0a

src/main/java/com/gitblit/wicket/pages/LuceneSearchPage.html

@@ -52,7 +52,9 @@
 						</div>
 					</div>
 					<div style="margin-left:10px;" class="span2">
-						<wicket:message key="gb.queryHelp"></wicket:message>
+						<wicket:message key="gb.queryHelp">
+						  <a target="_new" wicket:id="querySyntax"><wicket:message key="gb.querySyntax"/></a>
+						</wicket:message>
 					</div>
 				</div>
 			</div>

src/main/java/com/gitblit/wicket/pages/LuceneSearchPage.java

@@ -27,6 +27,7 @@ import org.apache.wicket.markup.html.basic.Label;
 import org.apache.wicket.markup.html.form.CheckBox;
 import org.apache.wicket.markup.html.form.ListMultipleChoice;
 import org.apache.wicket.markup.html.form.TextField;
+import org.apache.wicket.markup.html.link.ExternalLink;
 import org.apache.wicket.markup.html.panel.Fragment;
 import org.apache.wicket.markup.repeater.Item;
 import org.apache.wicket.markup.repeater.data.DataView;
@@ -50,6 +51,8 @@ import com.gitblit.wicket.panels.PagerPanel;
 
 public class LuceneSearchPage extends RootPage {
 
+	private final static String LUCENE_QUERY_SYNTAX_LINK = "https://lucene.apache.org/core/5_5_0/queryparser/org/apache/lucene/queryparser/classic/package-summary.html#package_description";
+
 	public LuceneSearchPage() {
 		super();
 		setup(null);
@@ -167,6 +170,7 @@ public class LuceneSearchPage extends RootPage {
 		form.add(selections.setEnabled(luceneEnabled));
 		form.add(new TextField<String>("query", queryModel).setEnabled(luceneEnabled));
 		form.add(new CheckBox("allrepos", allreposModel));
+		form.add(new ExternalLink("querySyntax", LUCENE_QUERY_SYNTAX_LINK));
 		add(form.setEnabled(luceneEnabled));
 
 		// execute search

src/test/java/com/gitblit/service/LuceneRepoIndexStoreTest.java

@@ -0,0 +1,267 @@
+/*
+ * Copyright 2017 gitblit.com.
+ *
+ * Licensed 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.gitblit.service;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import com.gitblit.utils.LuceneIndexStore;
+
+/**
+ * @author Florian Zschocke
+ *
+ */
+public class LuceneRepoIndexStoreTest
+{
+
+	private static final int LUCENE_VERSION = LuceneIndexStore.LUCENE_CODEC_VERSION;
+	private static final String LUCENE_DIR = "lucene";
+
+
+	@Rule
+	public TemporaryFolder baseFolder = new TemporaryFolder();
+
+
+	private String getIndexDir(int version)
+	{
+		return version + "_" + LUCENE_VERSION;
+	}
+
+
+	private String getLuceneIndexDir(int version)
+	{
+		return LUCENE_DIR + "/" + version + "_" + LUCENE_VERSION;
+	}
+
+
+	@Test
+	public void testGetConfigFile() throws IOException
+	{
+		int version = 1;
+		File repositoryFolder = baseFolder.getRoot();
+		LuceneRepoIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		File confFile= li.getConfigFile();
+		File luceneDir = new File(repositoryFolder, getLuceneIndexDir(version) + "/gb_lucene.conf");
+		assertEquals(luceneDir, confFile);
+	}
+
+
+	@Test
+	public void testCreate()
+	{
+		int version = 0;
+		File repositoryFolder = baseFolder.getRoot();
+		File luceneDir = new File(repositoryFolder, getLuceneIndexDir(version));
+		assertFalse("Precondition failure: directory exists already", new File(repositoryFolder, LUCENE_DIR).exists());
+		assertFalse("Precondition failure: directory exists already", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		li.create();
+
+		assertTrue(luceneDir.exists());
+		assertTrue(luceneDir.isDirectory());
+	}
+
+	@Test
+	public void testCreateIndexDir()
+	{
+		int version = 7777;
+		File repositoryFolder = baseFolder.getRoot();
+		try {
+			baseFolder.newFolder(LUCENE_DIR);
+		} catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		File luceneDir = new File(repositoryFolder, getLuceneIndexDir(version));
+
+		assertTrue("Precondition failure: directory does not exist", new File(repositoryFolder, LUCENE_DIR).exists());
+		assertFalse("Precondition failure: directory exists already", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		li.create();
+
+		assertTrue(luceneDir.exists());
+		assertTrue(luceneDir.isDirectory());
+
+		// Make sure nothing else was created.
+		assertEquals(0, luceneDir.list().length);
+		assertEquals(1, luceneDir.getParentFile().list().length);
+	}
+
+	@Test
+	public void testCreateIfNecessary()
+	{
+		int version = 7777888;
+		File repositoryFolder = baseFolder.getRoot();
+		File luceneDir = null;
+		try {
+			luceneDir = baseFolder.newFolder(LUCENE_DIR, getIndexDir(version));
+		} catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: directory does not exist", new File(repositoryFolder, LUCENE_DIR).exists());
+		assertTrue("Precondition failure: directory does not exist", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		li.create();
+
+		assertTrue(luceneDir.exists());
+		assertTrue(luceneDir.isDirectory());
+
+		// Make sure nothing else was created.
+		assertEquals(0, luceneDir.list().length);
+		assertEquals(1, luceneDir.getParentFile().list().length);
+	}
+
+
+	@Test
+	public void testDelete()
+	{
+		int version = 111222333;
+
+		File repositoryFolder = baseFolder.getRoot();
+		File luceneDir = null;
+		try {
+			luceneDir = baseFolder.newFolder(LUCENE_DIR, getIndexDir(version));
+		} catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: directory does not exist", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		assertTrue(li.delete());
+
+		assertFalse(luceneDir.exists());
+		assertTrue(new File(repositoryFolder, LUCENE_DIR).exists());
+	}
+
+
+	@Test
+	public void testDeleteNotExist()
+	{
+		int version = 0;
+
+		File repositoryFolder = baseFolder.getRoot();
+		try {
+			baseFolder.newFolder(LUCENE_DIR);
+		} catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		File luceneDir = new File(repositoryFolder, getLuceneIndexDir(version));
+		assertTrue("Precondition failure: directory does not exist", new File(repositoryFolder, LUCENE_DIR).exists());
+		assertFalse("Precondition failure: directory does exist", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		assertTrue(li.delete());
+
+		assertFalse(luceneDir.exists());
+		assertTrue(new File(repositoryFolder, LUCENE_DIR).exists());
+	}
+
+
+	@Test
+	public void testDeleteWithFiles()
+	{
+		int version = 5;
+
+		File repositoryFolder = baseFolder.getRoot();
+		File luceneFolder = new File(baseFolder.getRoot(), LUCENE_DIR);
+		File luceneDir = null;
+
+		File otherDir = new File(luceneFolder, version + "_10");
+		File dbFile = null;
+		try {
+			luceneDir = baseFolder.newFolder(LUCENE_DIR, getIndexDir(version));
+			File file = new File(luceneDir, "_file1");
+			file.createNewFile();
+			file = new File(luceneDir, "_file2.db");
+			file.createNewFile();
+			file = new File(luceneDir, "conf.conf");
+			file.createNewFile();
+
+			otherDir.mkdirs();
+			dbFile = new File(otherDir, "_file2.db");
+			dbFile.createNewFile();
+			file = new File(otherDir, "conf.conf");
+			file.createNewFile();
+		}
+		catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: index directory does not exist", luceneDir.exists());
+		assertTrue("Precondition failure: other index directory does not exist", otherDir.exists());
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		li.delete();
+
+		assertFalse(luceneDir.exists());
+		assertTrue(luceneFolder.exists());
+		assertTrue(otherDir.exists());
+		assertTrue(dbFile.exists());
+	}
+
+
+
+	@Test
+	public void testGetPath() throws IOException
+	{
+		int version = 7;
+		File repositoryFolder = baseFolder.getRoot();
+		LuceneIndexStore li = new LuceneRepoIndexStore(repositoryFolder, version);
+		Path dir = li.getPath();
+		File luceneDir = new File(repositoryFolder, getLuceneIndexDir(version));
+		assertEquals(luceneDir.toPath(), dir);
+	}
+
+
+	@Test
+	public void testHasIndex() throws IOException
+	{
+		int version = 0;
+		File luceneFolder = new File(baseFolder.getRoot(), "lucene");
+
+		LuceneIndexStore li = new LuceneRepoIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		baseFolder.newFolder("lucene");
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		File luceneDir = baseFolder.newFolder("lucene", getIndexDir(version));
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		new File(luceneDir, "write.lock").createNewFile();
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		new File(luceneDir, "segments_1").createNewFile();
+		li = new LuceneIndexStore(luceneFolder, version);
+		System.out.println("Check " + luceneDir);
+		assertTrue(li.hasIndex());
+
+	}
+
+
+}

src/test/java/com/gitblit/tests/BranchTicketServiceTest.java

@@ -59,7 +59,7 @@ public class BranchTicketServiceTest extends TicketServiceTest {
 		IUserManager userManager = new UserManager(runtimeManager, pluginManager).start();
 		IRepositoryManager repositoryManager = new RepositoryManager(runtimeManager, pluginManager, userManager).start();
 
-		BranchTicketService service = new BranchTicketService(
+		BranchTicketService service = (BranchTicketService) new BranchTicketService(
 				runtimeManager,
 				pluginManager,
 				notificationManager,

src/test/java/com/gitblit/tests/FileTicketServiceTest.java

@@ -58,7 +58,7 @@ public class FileTicketServiceTest extends TicketServiceTest {
 		IUserManager userManager = new UserManager(runtimeManager, pluginManager).start();
 		IRepositoryManager repositoryManager = new RepositoryManager(runtimeManager, pluginManager, userManager).start();
 
-		FileTicketService service = new FileTicketService(
+		FileTicketService service = (FileTicketService) new FileTicketService(
 				runtimeManager,
 				pluginManager,
 				notificationManager,

src/test/java/com/gitblit/tests/RedisTicketServiceTest.java

@@ -66,7 +66,7 @@ public class RedisTicketServiceTest extends TicketServiceTest {
 		IUserManager userManager = new UserManager(runtimeManager, pluginManager).start();
 		IRepositoryManager repositoryManager = new RepositoryManager(runtimeManager, pluginManager, userManager).start();
 
-		RedisTicketService service = new RedisTicketService(
+		RedisTicketService service = (RedisTicketService) new RedisTicketService(
 				runtimeManager,
 				pluginManager,
 				notificationManager,

src/test/java/com/gitblit/tests/UITicketTest.java

@@ -83,7 +83,7 @@ public class UITicketTest extends GitblitUnitTest {
 		IUserManager userManager = new UserManager(runtimeManager, pluginManager).start();
 		IRepositoryManager repositoryManager = new RepositoryManager(runtimeManager, pluginManager, userManager).start();
 
-		BranchTicketService service = new BranchTicketService(
+		BranchTicketService service = (BranchTicketService) new BranchTicketService(
 				runtimeManager,
 				pluginManager,
 				notificationManager,

src/test/java/com/gitblit/utils/LuceneIndexStoreTest.java

@@ -0,0 +1,245 @@
+/*
+ * Copyright 2017 gitblit.com.
+ *
+ * Licensed 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.gitblit.utils;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+
+/**
+ * @author Florian Zschocke
+ *
+ */
+public class LuceneIndexStoreTest
+{
+
+	private final int LUCENE_VERSION = LuceneIndexStore.LUCENE_CODEC_VERSION;
+
+	@Rule
+	public TemporaryFolder baseFolder = new TemporaryFolder();
+
+	private String getIndexDir(int version)
+	{
+		return version + "_" + LUCENE_VERSION;
+	}
+
+
+
+	@Test
+	public void testCreate()
+	{
+		int version = 0;
+		File luceneFolder = new File(baseFolder.getRoot(), "tickets/lucene");
+		assertFalse("Precondition failure: directory exists already", luceneFolder.exists());
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		li.create();
+
+		File luceneDir = new File(luceneFolder, getIndexDir(version));
+		assertTrue(luceneDir.exists());
+	}
+
+	@Test
+	public void testCreateIndexDir()
+	{
+		int version = 111222;
+		File luceneFolder = null;
+		try {
+			luceneFolder = baseFolder.newFolder("tickets", "lucene");
+		}
+		catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: directory does not exist", luceneFolder.exists());
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		li.create();
+
+		File luceneDir = new File(luceneFolder, getIndexDir(version));
+		assertTrue(luceneDir.exists());
+		assertTrue(luceneDir.isDirectory());
+
+		// Make sure nothing else was created.
+		assertEquals(0, luceneDir.list().length);
+		assertEquals(1, luceneDir.getParentFile().list().length);
+		assertEquals(1, luceneDir.getParentFile().getParentFile().list().length);
+	}
+
+	@Test
+	public void testCreateIfNecessary()
+	{
+		int version = 1;
+		File luceneFolder = new File(baseFolder.getRoot(), "tickets/lucene");
+		File luceneDir = null;
+		try {
+			luceneDir = baseFolder.newFolder("tickets", "lucene", getIndexDir(version));
+		}
+		catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: directory does not exist", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		li.create();
+
+		assertTrue(luceneDir.exists());
+		assertTrue(luceneDir.isDirectory());
+
+		// Make sure nothing else was created.
+		assertEquals(0, luceneDir.list().length);
+		assertEquals(1, luceneDir.getParentFile().list().length);
+		assertEquals(1, luceneDir.getParentFile().getParentFile().list().length);
+	}
+
+	@Test
+	public void testDelete()
+	{
+		int version = 111222333;
+		File luceneFolder = new File(baseFolder.getRoot(), "repo1/lucene");
+		File luceneDir = null;
+		try {
+			luceneDir = baseFolder.newFolder("repo1", "lucene", getIndexDir(version));
+		}
+		catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: index directory does not exist", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		assertTrue(li.delete());
+
+		assertFalse(luceneDir.exists());
+		assertTrue(luceneFolder.exists());
+	}
+
+	@Test
+	public void testDeleteNotExist()
+	{
+		int version = 0;
+
+		File luceneFolder = null;
+		try {
+			luceneFolder = baseFolder.newFolder("repo1", "lucene");
+		}
+		catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		File luceneDir = new File(luceneFolder, getIndexDir(version));
+		assertFalse("Precondition failure: index directory exists already", luceneDir.exists());
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		assertTrue(li.delete());
+
+		assertFalse(luceneDir.exists());
+		assertTrue(luceneFolder.exists());
+	}
+
+	@Test
+	public void testDeleteWithFiles()
+	{
+		int version = 111222333;
+
+		File luceneFolder = new File(baseFolder.getRoot(), "tickets/lucene");
+		File luceneDir = null;
+
+		File otherDir = new File(baseFolder.getRoot(), "tickets/lucene/" + version + "_10");
+		File dbFile = null;
+		try {
+			luceneDir = baseFolder.newFolder("tickets", "lucene", getIndexDir(version));
+			File file = new File(luceneDir, "_file1");
+			file.createNewFile();
+			file = new File(luceneDir, "_file2.db");
+			file.createNewFile();
+			file = new File(luceneDir, "conf.conf");
+			file.createNewFile();
+
+			otherDir.mkdirs();
+			dbFile = new File(otherDir, "_file2.db");
+			dbFile.createNewFile();
+			file = new File(otherDir, "conf.conf");
+			file.createNewFile();
+		}
+		catch (IOException e) {
+			fail("Failed in setup of folder: " + e);
+		}
+		assertTrue("Precondition failure: index directory does not exist", luceneDir.exists());
+		assertTrue("Precondition failure: other index directory does not exist", otherDir.exists());
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		li.delete();
+
+		assertFalse(luceneDir.exists());
+		assertTrue(luceneFolder.exists());
+		assertTrue(otherDir.exists());
+		assertTrue(dbFile.exists());
+	}
+
+
+
+
+	@Test
+	public void testGetPath() throws IOException
+	{
+		int version = 2;
+		File luceneFolder = baseFolder.newFolder("tickets", "lucene");
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		Path dir = li.getPath();
+		File luceneDir = new File(luceneFolder, getIndexDir(version));
+		assertEquals(luceneDir.toPath(), dir);
+	}
+
+
+
+	@Test
+	public void testHasIndex() throws IOException
+	{
+		int version = 0;
+		File luceneFolder = new File(baseFolder.getRoot(), "ticktock/lucene");
+
+		LuceneIndexStore li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		baseFolder.newFolder("ticktock");
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		baseFolder.newFolder("ticktock", "lucene");
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		File luceneDir = baseFolder.newFolder("ticktock", "lucene", getIndexDir(version));
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		new File(luceneDir, "write.lock").createNewFile();
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertFalse(li.hasIndex());
+
+		new File(luceneDir, "segments_1").createNewFile();
+		li = new LuceneIndexStore(luceneFolder, version);
+		assertTrue(li.hasIndex());
+
+	}
+
+}