From eb390969fc8d603f3538c372d4666cd4d8d41dac Mon Sep 17 00:00:00 2001
From: Pascal Grimaud <pascalgrimaud@gmail.com>
Date: Thu, 23 Dec 2021 11:37:41 +0100
Subject: [PATCH] Fix OAuth2 refresh token with concurrency

---
 .../package/security/oauth2/CustomClaimConverter.java.ejs     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/generators/server/templates/src/main/java/package/security/oauth2/CustomClaimConverter.java.ejs b/generators/server/templates/src/main/java/package/security/oauth2/CustomClaimConverter.java.ejs
index 4994fd6e14ce..1a1b45581479 100644
--- a/generators/server/templates/src/main/java/package/security/oauth2/CustomClaimConverter.java.ejs
+++ b/generators/server/templates/src/main/java/package/security/oauth2/CustomClaimConverter.java.ejs
@@ -36,9 +36,9 @@ import org.springframework.web.context.request.ServletRequestAttributes;
 
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;
 
@@ -54,7 +54,7 @@ public class CustomClaimConverter implements Converter<Map<String, Object>, Map<
 
     private final ClientRegistration registration;
 
-    private final Map<String, ObjectNode> users = new HashMap<>();
+    private final Map<String, ObjectNode> users = new ConcurrentHashMap<>();
 
     public CustomClaimConverter(ClientRegistration registration, RestTemplate restTemplate) {
         this.registration = registration;