sse 推送2版

README.md

@@ -15,4 +15,8 @@
 
 5 [SpringBoot使用WebSocket](https://blog.csdn.net/weixin_44185837/article/details/124942482)
 
-[【ServerSentEvents】服务端单向消息推送](http://www.manongjc.com/detail/40-envenmxrmjsschv.html)
+[【ServerSentEvents】服务端单向消息推送](https://www.cnblogs.com/mindzone/p/16877161.html)
+
+[java实现web实时消息推送的七种方案--个人学习记录](https://blog.csdn.net/weixin_44705301/article/details/128670957)
+
+

src/main/java/com/xtong/zhbs/controller/PassFlowController.java

@@ -3,37 +3,36 @@ package com.xtong.zhbs.controller;
 import com.alibaba.fastjson.JSONObject;
 import com.xtong.zhbs.bean.PassengerFlow;
 import com.xtong.zhbs.service.PassengerFlowService;
+import com.xtong.zhbs.service.SeverSentEventService;
 import com.xtong.zhbs.utils.AjaxResult;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiImplicitParam;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.ResponseBody;
-import org.springframework.web.context.request.async.DeferredResult;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
 
-
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
+import javax.annotation.Resource;
 import java.util.List;
+import java.util.Map;
 
 /**
  *  实时客流
  */
 @Api(tags = "客流趋势")
-@Controller
+@RestController
 @RequestMapping(value = "/real/")
 public class PassFlowController {
+    @Resource
+    private SeverSentEventService severSentEventService;
+
     @Autowired
     private PassengerFlowService passengerFlowService;
 
     @ApiImplicitParam(name = "page",value = "姓名",required = true)
     @ApiOperation(value = "客流列表")
     @GetMapping(value = "/psflist")
-    @ResponseBody
     public JSONObject psflist(@RequestParam String page, @RequestParam("limit") String limit){
         int ipage = 1;
         int ilimit=10;
@@ -42,25 +41,43 @@ public class PassFlowController {
     }
 
     /**
-     * 数据流方式输出内容
-     * @param response
-     * @return
-     * @throws IOException
+     * web连接的SSE目标地址, 保管凭证并返回这个会话资源给web，注意produces属性必须是文本事件流形式
+     * 凭证可以使用@PathVariable或者Url参数获取
+     * /approve/sse/message
+     * @param token
+     * @return SseEmitter
+     * @author cloud9
+     * @date 2022/11/10 09:57
+     *
      */
-    @ResponseBody
-    @RequestMapping(value = "/getMsg", produces="text/event-stream;charset=UTF-8")
-    DeferredResult<String> getMsg(HttpServletResponse response) throws IOException {
-        response.setContentType("text/event-stream");
-        response.setCharacterEncoding("UTF-8");
-        response.setStatus(200);
-        List<PassengerFlow> passengerFlowList = passengerFlowService.getPassengerFlowList(1,10);
-//        msgService.removeErrorResponse();
-//        msgService.getListRes().add(response);
-        if(!response.getWriter().checkError()){
-            response.getWriter().write("data:hello\n\n");
-            response.getWriter().flush();
-        }
-        DeferredResult<String> df = new DeferredResult<String>(60000l);
-        return df;
+    @GetMapping(value = "/sse/message", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
+    public SseEmitter message(@RequestParam("clientToken") String token) {
+        return severSentEventService.createConnection(token);
     }
+
+    @GetMapping(value = "/boardcast")
+    public JSONObject boardCast(){
+        String message="this is your Dad!!";
+//        SseEmitter.SseEventBuilder builder = SseEmitter
+//                .event()
+//                .data(message);
+        severSentEventService.sendMessageToClient(message);
+        return AjaxResult.renderMsg("ookk");
+    }
+
+    /**
+     * 提供给POSTMAN测试调用，方便给web发送消息调试
+     * /approve/sse/message/send
+     * @param map
+     * @author cloud9
+     * @date 2022/11/10 10:25
+     *
+     */
+    @PostMapping("/sse/message/send")
+    public void send(@RequestBody Map<String, String> map) {
+        String client = map.get("client");
+        String txt = map.get("txt");
+        severSentEventService.sendMessageToClient(client, txt);
+    }
+
 }

src/main/java/com/xtong/zhbs/service/SeverSentEventService.java

@@ -23,7 +23,8 @@ public class SeverSentEventService {
     /**
      * 连接超时时限1小时 （客户端不活跃的时长上限？）
      */
-    private static final Long TIME_OUT = 1000L * 60L * 60L;
+    private static final Long TIME_OUT = 3600L;
+//    private static final Long TIME_OUT = 1000L * 60L * 60L;
 
     /**
      * 根据客户端标识创建SSE连接

src/main/java/com/xtong/zhbs/utils/AjaxResult.java

@@ -40,6 +40,12 @@ public class AjaxResult {
         return result;
     }
 
+    public static JSONObject renderMsg(String msg){
+        JSONObject result = new JSONObject();
+        result.put("code",200);
+        result.put("msg",msg);
+        return result;
+    }
     /**
      * 异常信息
      * @param msg