From 7defbfc18b5e43f1de271419ea37ace7a2984d43 Mon Sep 17 00:00:00 2001
From: Rossen Stoyanchev <rstoyanchev@pivotal.io>
Date: Thu, 13 Aug 2015 08:00:24 -0400
Subject: [PATCH] Ensure concurrent WebSocketSession wrapper is used

Issue: SPR-13326
---
 .../web/socket/messaging/SubProtocolWebSocketHandler.java    | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/spring-websocket/src/main/java/org/springframework/web/socket/messaging/SubProtocolWebSocketHandler.java b/spring-websocket/src/main/java/org/springframework/web/socket/messaging/SubProtocolWebSocketHandler.java
index 0545be849c..e5446696c6 100644
--- a/spring-websocket/src/main/java/org/springframework/web/socket/messaging/SubProtocolWebSocketHandler.java
+++ b/spring-websocket/src/main/java/org/springframework/web/socket/messaging/SubProtocolWebSocketHandler.java
@@ -309,9 +309,12 @@ public class SubProtocolWebSocketHandler implements WebSocketHandler,
 	 */
 	@Override
 	public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
+		WebSocketSessionHolder holder = this.sessions.get(session.getId());
+		if (holder != null) {
+			session = holder.getSession();
+		}
 		SubProtocolHandler protocolHandler = findProtocolHandler(session);
 		protocolHandler.handleMessageFromClient(session, message, this.clientInboundChannel);
-		WebSocketSessionHolder holder = this.sessions.get(session.getId());
 		if (holder != null) {
 			holder.setHasHandledMessages();
 		}