Hi!
Is this the same idea as this:
https://stripesframework.atlassian.net/wiki/display/STRIPES/Wait+Page+for+Long+Events
?
Joaquin
> On Jan 23, 2016, at 10:52 AM, VANKEISBELCK Remi <r...@rvkb.com> wrote:
>
> Hi again,
>
> Seems like a regular "long running job / polling" scenario. It can be done
> with current Stripes version, even if it will be less performant if your http
> client is really non blocking, but that's another story.
>
> So here's how I'd do this.
>
> 1/ Server side
>
> In the ActionBean, I'd submit a task to an executor service (a thread pool)
> with that long running job that calls the webservice. This task should update
> the back-end state in some way, so that you can do polling and know when it's
> done.
> The same ActionBean can handle Ajax polling via another event method. This
> one will be called from some JS code in your page.
>
> public class MyAction implements ActionBean {
>
> public Resolution triggerLongRunningJob() {
> // retrieve Executor Service, from servlet context or custom
> ActionBeanContext
> ExecutorService executorService = ... ;
> // submit task
> executorService.submit(new MyLongRunningTask(...);
> // return a redirect resolution to the "wait" screen
> return new RedirectResolution(getClass(), "displayWaitScreen")
> }
>
> public Resolution displayWaitScreen() {
> return new ForwardResolution("/WEB-INF/jsp/wait-screen.jsp");
> }
>
> public Resolution poll() {
> // find task completion status and return to the client
> String jsonTaskCompletion = ... ;
> return new StreamingResolution("application/json", jsonTaskCompletion);
> }
>
>
> // the long running task code is in a Runnable
> private class MyLongRunningTask implements Runnable {
> public void run() {
> // call the webservice and update internal state
>
> }
> }
> }
>
>
> 2/ Client side
>
> First you'll submit the form to the 'triggerLongRunningJob' event. This will
> launch the background task and return directly.
> Then, you'll send xhr requests to the 'poll' event, that will tell you what
> to do next. If task has completed, then you'll probably change the location
> of the browser in some way in order to display a "result" page of some sort
> (ie use your data from the completed task and do whatever you need with it).
>
> HTH
>
> Rémi
>
>
>
>
>
> 2016-01-23 17:05 GMT+01:00 Ron King <ronck...@gmail.com>:
>> Hi everyone,
>>
>> I want to write an html page back to the user at the very beginning of an
>> ActionBean submit method.
>> The method calls a web service that takes around a minute to respond, and I
>> want to put up a message
>> before the web service finishes.
>>
>> I'm on Tomcat 8. I tried flushing the writer, but the page still doesn't
>> display until after I return the
>> Resolution from the submit method.
>>
>> Is there a way to make it write immediately?
>>
>> Regards,
>>
>> Ron
>>
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