From f20c11a4e2d60b9902b9be9eaeb99f2570d04856 Mon Sep 17 00:00:00 2001
From: Feng Chang <chang_196700@hotmail.com>
Date: Mon, 4 Feb 2019 02:18:24 +0800
Subject: [PATCH] Ensure sequential execution of configuration writer threads
 (#516)

* Ensure sequential execution of configuration writer threads

Signed-off-by: Chang Feng <chang_196700@hotmail.com>

* Change method to add synchronized to action

Signed-off-by: Chang Feng <chang_196700@hotmail.com>
---
 .../java/org/jackhuang/hmcl/util/InvocationDispatcher.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/InvocationDispatcher.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/InvocationDispatcher.java
index d67020aad..274e05edb 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/InvocationDispatcher.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/InvocationDispatcher.java
@@ -33,7 +33,9 @@ public class InvocationDispatcher<ARG> implements Consumer<ARG> {
 
     public static <ARG> InvocationDispatcher<ARG> runOn(Consumer<Runnable> executor, Consumer<ARG> action) {
         return new InvocationDispatcher<>(arg -> executor.accept(() -> {
-            action.accept(arg.get());
+            synchronized (action) {
+                action.accept(arg.get());
+            }
         }));
     }