springmvc ajax 長輪詢

前台代碼:

<script type="text/javascript">
$(function(){


   function poll(){
     var param={"searchType":"1","key":"0100008","timestamp":"1409382910" ,"sign":"123" };
     $.ajax({ type: "POST",
	     contentType:"application/json;charset=utf-8",
	url: "xxxx",data:JSON.stringify(param), success:function(data) {
          console.log(data);
          poll();
       }, dataType: "json" }); 
   }

   poll();


});
</script>
           

背景代碼:

private final ExecutorService exec = Executors.newFixedThreadPool(1);
	
	private BlockingQueue queue=new ArrayBlockingQueue<>(5);


@RequestMapping(value = "/findUserAreaList3")
	@ResponseBody
	public  BaseResult<Object> findUserAreaList3()  {
		
		 Callable<Object> call = new Callable<Object>() {
		        public Object call() throws Exception {
		        	Object take = queue.take();
		            return take;
		        }
		    };
			
		    Future<Object> future = exec.submit(call);
		    Object ret;
			try {
				// 任務處理逾時時間設為 10秒
				ret = future.get(10, TimeUnit.SECONDS);
			} catch (Exception e) {
				 return setResponseVo("error");
			}  
            
            return setResponseVo(ret);
		
	}
           

轉載于:https://my.oschina.net/u/3025651/blog/1498894