From 435c3e59682795fddaa9663e2f1e8401b90896e9 Mon Sep 17 00:00:00 2001
From: guoshilong <123456>
Date: Sat, 23 Sep 2023 15:29:00 +0800
Subject: [PATCH] Merge remote-tracking branch 'origin/main'

---
 src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java b/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java
index a54b97f..ff57dd4 100644
--- a/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java
+++ b/src/main/java/com/dji/sample/component/websocket/service/impl/SendMessageServiceImpl.java
@@ -62,12 +62,14 @@
             TextMessage data = new TextMessage(mapper.writeValueAsBytes(message));
 
             for (ConcurrentWebSocketSession session : sessions) {
-                if (!session.isOpen()) {
-                    session.close();
-                    log.debug("This session is closed.");
-                    return;
+                if (!Objects.isNull(session)) {
+                    if (!session.isOpen()) {
+                        session.close();
+                        log.debug("This session is closed.");
+                        return;
+                    }
+                    session.sendMessage(data);
                 }
-                session.sendMessage(data);
             }
 
         } catch (IOException e) {

--
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