java – 当我们使用servlet3规范中提到的AsyncContext时,http连

final AsyncContext asyncContext = httpServletRequest.startAsync();
asyncContext.setTimeout(0);
asyncContexts.offer(asyncContext);
....
....

  new Thread(new Runnable() {
      @Override
      public void run() {
          try {
              final BufferedReader read = facade.getStreamData();
              while (read.ready()) {
                  httpServletResponse.setContentType("text/html");
                  if(i   100) {
                      asyncContext.complete();
                  }
                  if(Strings.isNullOrEmpty(read.readLine())) {
                      continue;
                  }
                  asyncContext.getResponse().getWriter().print(read.readLine());
                  asyncContext.getResponse().flushBuffer();
                  i = i + 10;
                  Thread.sleep(2000);
              }
              asyncContext.getResponse().getWriter().print("#" + 100);
              asyncContext.getResponse().flushBuffer();
              asyncContext.complete();
          } catch (IOException e) {
              throw new RuntimeException(
                              "Error when writing the event.",e);
          } catch (InterruptedException e) {
              throw new RuntimeException(
                      "Error when writing the event.",e);
          } 
      } }).start();

这是工作！并且当刷新缓冲区时,内容在客户端可用.

我的问题是,这个连接保持打开多长时间？以及即使标题中没有提到keep-alive,服务器如何管理它？