From 60ae76fae1d96ac2656ded5594cbb8eea39a9efd Mon Sep 17 00:00:00 2001
From: Bernd Eckenfels <b.eckenfels@seeburger.de>
Date: Thu, 23 May 2024 17:52:34 +0200
Subject: [PATCH] Reduce the number of dangling FileListeners due to collect
 operation.

---
 .../digestarc/DarcFileCollectOperation.java     | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/vfs2provider-digestarc/src/main/java/com/seeburger/vfs2/provider/digestarc/DarcFileCollectOperation.java b/vfs2provider-digestarc/src/main/java/com/seeburger/vfs2/provider/digestarc/DarcFileCollectOperation.java
index 3ff1960..5c27675 100644
--- a/vfs2provider-digestarc/src/main/java/com/seeburger/vfs2/provider/digestarc/DarcFileCollectOperation.java
+++ b/vfs2provider-digestarc/src/main/java/com/seeburger/vfs2/provider/digestarc/DarcFileCollectOperation.java
@@ -48,11 +48,15 @@ public DarcFileCollectOperation(FileObject root)
     public void process()
         throws FileSystemException
     {
-        if (root instanceof DarcFileObject)
+        if !(root instanceof DarcFileObject)
+        {
+            return;
+        }
+        
+        final DarcFileObject darcFile = (DarcFileObject) root;
+        final FileObject delegateFile = darcFile.getDelegateFile();
+        try
         {
-            DarcFileObject darcFile = (DarcFileObject) root;
-            FileObject delegateFile = darcFile.getDelegateFile();
-
             filesList.add(delegateFile.getName().getURI());
 
             if (darcFile.getType() == FileType.FOLDER)
@@ -70,5 +74,10 @@ public void process()
                 }
             }
         }
+        finally
+        {
+            // we can speed up freeing this listener darcFile is no longer needed
+            delegateFile.getFileSystem().removeListener(delegateFile, darcFile);
+        }
     }
 }