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Polling Worker Contoller in Rails
class MyController < ApplicationController
def new
end
def create
@job_id = MyWorker.perform_async(my_params)
render :status => :accepted, :json => { jobId: @job_id }
end
def fetch
job_id = params[:job_id]
if Sidekiq::Status::complete? job_id
render :status => 200, :text => Sidekiq::Status::get(job_id, :output)
elsif Sidekiq::Status::failed? job_id
render :status => 500, :text => 'Failed'
else
render :status => 202, :text => ''
end
end
protected
def my_params
params.require(:something).permit(:this)
end
end
class MyWorker
include Sidekiq::Worker
include Sidekiq::Status::Worker
def perform(params)
#do long work
#...
#...
av = ActionView::Base.new(Rails.root.join('app', 'views'))
av.assign({:outpout => @output})
store :output, av.render(:template => "my_controller/long_view.html")
end
end
<%= form_tag my_controller_create_path, method: :get, id: 'worker-form' do |f| %>
<%= fields_for "something[]" do |ff| %>
<%= text_field_tag :this %>
<% end %>
<%= submit_tag %>
<% end %>
<div id='result'>
</div>
<%= javascript_tag do %>
var sendJobForm = function(event) {
event.preventDefault();
var $form = $(this),
$submit = $form.find('input[type=submit]'),
$result = $('#result');
function output(msg) { $result.html(msg) }
function jobFinished(jobResult) {
$submit.val('Create Job').removeAttr('disabled');
$result.html(jobResult);
}
function pollJob(jobId, successCallback) {
function poll() {
var pollEvery = 3000; // milliseconds
$.ajax({
type: "GET",
url: "/my_controller/fetch/" + jobId, // coupled to your app's routes
dataType: 'text',
statusCode: {
200: function(data) { successCallback(data); },
202: function(data) { setTimeout(poll, pollEvery); },
500: function(data) { output('Error!'); }
}
});
};
poll();
}
$submit.attr('disabled', true);
output('Creating...');
$.ajax({
type: "POST",
url: $form.attr('action'),
data: $form.serialize(),
dataType: 'json',
success: function(data) {
output('Job queued, waiting...');
pollJob(data.jobId, jobFinished);
}
});
};
$('form').submit(sendJobForm);
<% end %>
get "my_controller/new"
get "my_controller/fetch/:job_id", controller: :my_controller, action: :fetch
post "my_controller/create"
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