From b80feabb97c4ac0548c594b3edb12303b4608c28 Mon Sep 17 00:00:00 2001
From: Andrea Cavalli <andrea@cavallium.it>
Date: Wed, 30 Jun 2021 23:43:46 +0200
Subject: [PATCH] Use NIOFSDirectory

---
 .../cavallium/dbengine/database/disk/LLLocalLuceneIndex.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalLuceneIndex.java b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalLuceneIndex.java
index bb37032..379bea8 100644
--- a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalLuceneIndex.java
+++ b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalLuceneIndex.java
@@ -67,6 +67,7 @@ import org.apache.lucene.search.similarities.TFIDFSimilarity;
 import org.apache.lucene.store.ByteBuffersDirectory;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.FSDirectory;
+import org.apache.lucene.store.FSLockFactory;
 import org.apache.lucene.store.IOContext;
 import org.apache.lucene.store.MMapDirectory;
 import org.apache.lucene.store.NIOFSDirectory;
@@ -87,6 +88,8 @@ import reactor.util.function.Tuples;
 
 public class LLLocalLuceneIndex implements LLLuceneIndex {
 
+	private static final boolean ALLOW_MMAP = false;
+
 	protected static final Logger logger = LoggerFactory.getLogger(LLLocalLuceneIndex.class);
 	private static final LuceneStreamSearcher streamSearcher = new AdaptiveStreamSearcher();
 	private static final AllowOnlyQueryParsingCollectorStreamSearcher allowOnlyQueryParsingCollectorStreamSearcher
@@ -147,7 +150,7 @@ public class LLLocalLuceneIndex implements LLLuceneIndex {
 		} else {
 			Directory directory;
 			{
-				FSDirectory fsDirectory = FSDirectory.open(directoryPath);
+				FSDirectory fsDirectory = ALLOW_MMAP ? FSDirectory.open(directoryPath) : new NIOFSDirectory(directoryPath);
 				if (Constants.LINUX || Constants.MAC_OS_X) {
 					if (!lowMemory) {
 						directory = new DirectIODirectory(fsDirectory, 5 * 1024 * 1024, 60 * 1024 * 1024);