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fix(ai): 修复 AI 聊天缓存类型异常和 SSE 连接关闭问题 #1678

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fix(ai): 修复 AI 聊天缓存类型异常和 SSE 连接关闭问题 #1678

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20 changes: 17 additions & 3 deletions ...-server-web-api/src/main/java/ai/chat2db/server/web/api/controller/ai/ChatController.java
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Original file line number Diff line number Diff line change
Expand Up @@ -462,14 +462,28 @@ private SseEmitter chatWithBaichuanAi(ChatQueryRequest queryRequest, SseEmitter
* @return
*/
private List<FastChatMessage> getFastChatMessage(String uid, String prompt) {
List<FastChatMessage> messages = (List<FastChatMessage>)LocalCache.CACHE.get(uid);
List<FastChatMessage> messages = null;
Object cachedItem = LocalCache.CACHE.get(uid);

if (cachedItem instanceof List) {
try {
messages = (List<FastChatMessage>) cachedItem;
} catch (ClassCastException e) {
// 处理类型转换异常，创建新的消息列表
log.warn("Error casting cached item to List<FastChatMessage>: {}", e.getMessage());
messages = Lists.newArrayList();
}
} else {
// 如果缓存项不是List类型，创建新的消息列表
messages = Lists.newArrayList();
}

if (CollectionUtils.isNotEmpty(messages)) {
if (messages.size() >= contextLength) {
messages = messages.subList(1, contextLength);
}
} else {
messages = Lists.newArrayList();
}

FastChatMessage currentMessage = new FastChatMessage(FastChatRole.USER).setContent(prompt);
messages.add(currentMessage);
return messages;
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10 changes: 6 additions & 4 deletions ...java/ai/chat2db/server/web/api/controller/ai/rest/listener/RestAIEventSourceListener.java
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Original file line number Diff line number Diff line change
Expand Up @@ -77,14 +77,16 @@ public void onEvent(EventSource eventSource, String id, String type, String data
public void onClosed(EventSource eventSource) {
log.info("REST AI close sse connection...");
try {
sseEmitter.send(SseEmitter.event()
// 使用 try-catch 直接尝试发送事件，如果已完成会抛出异常被捕获
this.sseEmitter.send(SseEmitter.event()
.id("[DONE]")
.data("[DONE]")
.reconnectTime(3000));
} catch (IOException e) {
throw new RuntimeException(e);
this.sseEmitter.complete();
} catch (Exception e) {
// 可能是 SseEmitter 已经完成状态，记录日志但不重新抛出异常
log.info("SseEmitter may already be completed: {}", e.getMessage());
}
sseEmitter.complete();
}

@Override
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