base_controller.rb

module Administration
  class Administration::BaseController < ApplicationController
    layout 'administration'

    private


    def current_session_process_id(_city_id, _process_id = nil )
      session["user.process_id.#{ _city_id }"] = _process_id if _process_id
      session["user.process_id.#{ _city_id }"]
    end

    def get_current_status_for( _city_id )
      status = Sidekiq::Status::pct_complete( current_session_process_id( _city_id ) )
      if status.is_a?( Integer ) && s == 100 then reset_session end
      status
    end

  end
end

tracker_controller.rb

module Administration
  class Administration::TrackersController < Administration::BaseController
    before_action :set_tracker, only: [:start, :shutdown, :restart]

    def restart
      @tracker.restart
      current_session_process_id(@tracker.city_entity.id, @tracker.process_id)
      redirect_to :back, notice: 'Tracker have been restarted.'
    end

    def start
      @tracker.deploy!
      current_session_process_id(@tracker.city_entity.id, @tracker.process_id)
      redirect_to :back, notice: 'Tracker have been started.'
    end

    def shutdown
      @tracker.shutdown!
      current_session_process_id(@tracker.city_entity.id, @tracker.process_id)
      redirect_to :back, notice: 'Tracker have been turned off.'
    end

    private

    def set_tracker
      @tracker = Tracker.find( params[:id] )
    end
  end
end

tracker_controller_test.rb

require 'test_helper'

class TrackersControllerTest < ActionController::TestCase
  setup do
    @url = '/administration/city_entities/980190963'
    @tracker = trackers(:one)
    @tracker.save

    puts @tracker.state
    @controller = Administration::TrackersController.new
    request.env['HTTP_REFERER'] = @url # tels where the request is coming from
  end

  test 'Should start a Tracker' do
    get :start, id: @tracker.id
    assert_redirected_to @url


    puts session.inspect
    tmp_tracker = Tracker.find( @tracker.id )
    puts tmp_tracker.state
    assert (tmp_tracker.state.to_sym == :running), 'expected state: loading'
  end

  test 'Should restart a Tracker' do
    get :restart, id: @tracker.id
    assert_redirected_to @url

    tmp_tracker = Tracker.find( @tracker.id )
    puts tmp_tracker.state
    assert ( (tmp_tracker.state.to_sym == :running) || (tmp_tracker.state.to_sym == :loading) ), 'expected state: loading'
  end

  test 'Should shutdown a Tracker and delete unsed files (pid & log)' do
    get :shutdown, id: @tracker.id
    assert_redirected_to @url

    tmp_tracker = Tracker.find( @tracker.id )

    puts tmp_tracker.state
    assert (tmp_tracker.state.to_sym == :stopped), 'expected state: stopped'
    assert ( !File.exists?( tmp_tracker.pid_file_path ) ), 'expected pid file to be deleted'
    assert ( !File.exists?( tmp_tracker.log_file_path ) ), 'expected log file to be deleted'
  end

end