From eac3de15496fc228e042af19ffd1f9f876776b3c Mon Sep 17 00:00:00 2001
From: twisti <76837088+twisti-dev@users.noreply.github.com>
Date: Sun, 22 Mar 2026 11:28:44 +0100
Subject: [PATCH] Replace HashMap with ConcurrentHashMap for thread-safe
 caching in CacheableRegistry

---
 .../com/turikhay/mc/mapmodcompanion/spigot/IdRegistry.java    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spigot/src/main/java/com/turikhay/mc/mapmodcompanion/spigot/IdRegistry.java b/spigot/src/main/java/com/turikhay/mc/mapmodcompanion/spigot/IdRegistry.java
index ea3b0b0..697ab19 100644
--- a/spigot/src/main/java/com/turikhay/mc/mapmodcompanion/spigot/IdRegistry.java
+++ b/spigot/src/main/java/com/turikhay/mc/mapmodcompanion/spigot/IdRegistry.java
@@ -5,16 +5,16 @@
 import com.turikhay.mc.mapmodcompanion.VerboseLogger;
 import org.bukkit.World;
 
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.logging.Logger;
 
 public interface IdRegistry {
     int getId(World world);
 
     class CacheableRegistry implements IdRegistry {
-        private final Map<String, Integer> cache = new HashMap<>();
+        private final Map<String, Integer> cache = new ConcurrentHashMap<>();
         private final IdRegistry delegate;
 
         public CacheableRegistry(IdRegistry delegate) {