Paper/CraftBukkit-Patches/0042-Close-Unloaded-World-s-Save-Files.patch

From 7c270c3974b72f4338387b224b1bc3683062e721 Mon Sep 17 00:00:00 2001
From: Antony Riley <antony@cyberiantiger.org>
Date: Wed, 27 Mar 2013 01:41:54 +0200
Subject: [PATCH] Close Unloaded World's Save Files


diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
index 900ed68..829f4a3 100644
--- a/src/main/java/net/minecraft/server/RegionFileCache.java
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -10,7 +10,7 @@ import java.util.Map;
 
 public class RegionFileCache {
 
-    private static final Map a = new HashMap();
+    public static final Map a = new HashMap(); // CraftBukkit - private -> public
 
     public static synchronized RegionFile a(File file1, int i, int j) {
         File file2 = new File(file1, "region");
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 2485ef9..b6fe332 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -37,6 +37,8 @@ import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.MobEffectList;
 import net.minecraft.server.PropertyManager;
 import net.minecraft.server.ServerCommand;
+import net.minecraft.server.RegionFile;
+import net.minecraft.server.RegionFileCache;
 import net.minecraft.server.ServerNBTManager;
 import net.minecraft.server.WorldLoaderServer;
 import net.minecraft.server.WorldManager;
@@ -831,6 +833,30 @@ public final class CraftServer implements Server {
         worlds.remove(world.getName().toLowerCase());
         console.worlds.remove(console.worlds.indexOf(handle));
 
+        File parentFolder = world.getWorldFolder().getAbsoluteFile();
+
+        // Synchronized because access to RegionFileCache.a is guarded by this lock.
+        synchronized (RegionFileCache.class) {
+            // RegionFileCache.a should be RegionFileCache.cache
+            Iterator<Map.Entry<File, RegionFile>> i = RegionFileCache.a.entrySet().iterator();
+            while(i.hasNext()) {
+                Map.Entry<File, RegionFile> entry = i.next();
+                File child = entry.getKey().getAbsoluteFile();
+                while (child != null) {
+                    if (child.equals(parentFolder)) {
+                        i.remove();
+                        try {
+                            entry.getValue().c(); // Should be RegionFile.close();
+                        } catch (IOException ex) {
+                            getLogger().log(Level.SEVERE, null, ex);
+                        }
+                        break;
+                    }
+                    child = child.getParentFile();
+                }
+            }
+        }
+
         return true;
     }
 
-- 
1.8.1.2