Multiple parallel request is not handled by server

Question

I am trying to get the progress of a controller method. I have used setInterval method to call the progress method inside the controller but the ajax call inside the setInterval only hits the controller after the execution of controller method and till that time the ajax requests status keeps pending on browser network tab.

I have considered making first method asynchronous

Java Script code

function Import() {
    $('.loader').show();

    var checked;
    if ($('#chkNewCycle').is(":checked")) {
        checked = 'on';
    }
    else {
        checked = 'off';
    }

    var NewCycle = { IsNewCycle: checked };

    $.ajax({
        url: '/DataImport/Import',
        type: 'POST',
        data: NewCycle,
        success: function (result) {
            $('.loader').hide();
            if (result == "success") {
                window.clearInterval(intervalId);
                alert("Imported file for processing.");
                ClearData();

            }
            else {
                alert(result);
            }
        }
    });   


    var intervalId = window.setInterval(function () {
        $.getJSON('/DataImport/GetProgress', function (json) {
            console.log(json.Progress);
            $('#progress').html(json.Progress + '%');
        });
    }, 2000);



}

controller.cs

public async Task<string> Import(string IsNewCycle)
{
/*Some Code*/

await Task.Run(() => { 
/*Some Code*/

int iProgress =Convert.ToInt32(dProgress * 100);
HttpContext.Application["Progress" ] = iProgress;

 });

return string;


}

public ActionResult GetProgress()
{
return Json(new
{
     Progress = HttpContext.Application["Progress"]
}, JsonRequestBehavior.AllowGet);
}

I need to get both the controller method hit simultaneously

I think this should work! How are you determining that it is not hitting both simultaneously — Kaushik
– Kaushik, Commented Nov 4, 2019 at 10:14
Inside Chrome Network tab multiple progress request status is pending — MITHUN VS
– MITHUN VS, Commented Nov 4, 2019 at 10:17
yes and its not hitting. It will hit once the first ajax call gets completed — MITHUN VS
– MITHUN VS, Commented Nov 4, 2019 at 10:19
if you'll hold the debugger it won't hit another. Try using log of manipulating some data. and see if changed? — Kaushik
– Kaushik, Commented Nov 4, 2019 at 10:20

Ameerudheen.K · Accepted Answer · 2019-11-04 10:31:35Z

2

Decorate your controller with [SessionState(SessionStateBehavior.ReadOnly)] attribute, then you can execute requests in parallel.

answered Nov 4, 2019 at 10:31

Ameerudheen.K

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