Add Hangfire

Adjust namespace

WebCms/App_Start/HangfireStartup.cs

@@ -0,0 +1,107 @@
+using System.Web.Hosting;
+using Hangfire;
+using LeafWeb.WebCms.App_Start;
+using LeafWeb.WebCms.Services.PiscalQueue;
+using Microsoft.Owin;
+using Owin;
+using Umbraco.Web;
+using ConfigurationManager = System.Configuration.ConfigurationManager;
+
+[assembly: OwinStartup(typeof(LeafwebOwinStartup))]
+
+namespace LeafWeb.WebCms.App_Start
+{
+	public class LeafwebOwinStartup : UmbracoDefaultOwinStartup
+	{
+		public new void Configuration(IAppBuilder app)
+		{
+			base.Configuration(app);
+			new HangfireStartup().Configuration(app);
+		}
+	}
+
+	// https://our.umbraco.org/forum/umbraco-7/using-umbraco-7/59500-Umbraco-and-Background-Tasks
+	public class HangfireStartup
+	{
+		private const string PiscalProcessQueue = "PiscalProcessQueue";
+
+		public void Configuration(IAppBuilder app)
+		{
+			app.UseHangfireDashboard();
+
+			SetupRecurringJobs();
+		}
+
+		private void SetupRecurringJobs()
+		{
+			var queueInterval = ConfigurationManager.AppSettings["ProcessQueueInterval"];
+			// https://discuss.hangfire.io/t/how-to-create-cron-job-that-is-executing-every-15-minutes/533
+			RecurringJob.AddOrUpdate<PiscalQueueManager>(PiscalProcessQueue, p => p.ProcessQueue(), queueInterval);
+		}
+
+		public static void TriggerPiscalProcessQueue()
+		{
+			RecurringJob.Trigger(PiscalProcessQueue);
+		}
+	}
+
+	// http://docs.hangfire.io/en/latest/deployment-to-production/making-aspnet-app-always-running.html
+	public class ApplicationPreload : IProcessHostPreloadClient
+	{
+		public void Preload(string[] parameters)
+		{
+			HangfireBootstrapper.Instance.Start();
+		}
+	}
+
+	public class HangfireBootstrapper : IRegisteredObject
+	{
+		public static readonly HangfireBootstrapper Instance = new HangfireBootstrapper();
+
+		private readonly object _lockObject = new object();
+		private bool _started;
+
+		private BackgroundJobServer _backgroundJobServer;
+
+		private HangfireBootstrapper()
+		{
+		}
+
+		public void Start()
+		{
+			lock (_lockObject)
+			{
+				if (_started) return;
+				_started = true;
+
+				HostingEnvironment.RegisterObject(this);
+
+				// TODO: use Umbraco Connection string?
+				var cs = Umbraco.Core.ApplicationContext.Current.DatabaseContext.ConnectionString;
+
+				GlobalConfiguration
+					.Configuration
+					.UseSqlServerStorage("LeafWebContext");
+				// Specify other options here
+
+				_backgroundJobServer = new BackgroundJobServer();
+			}
+		}
+
+		public void Stop()
+		{
+			lock (_lockObject)
+			{
+
+				_backgroundJobServer?.Dispose();
+
+				HostingEnvironment.UnregisterObject(this);
+			}
+		}
+
+		void IRegisteredObject.Stop(bool immediate)
+		{
+			Stop();
+		}
+	}
+}

WebCms/App_Start/RegisterServices.cs

@@ -1,17 +1,14 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Web;
-using LeafWeb.Core.DAL;
+using LeafWeb.Core.DAL;
 using Umbraco.Core;
 
-namespace WebCms.App_Start
+namespace LeafWeb.WebCms.App_Start
 {
-	public class RegisterDataService : ApplicationEventHandler
+	public class RegisterServices : ApplicationEventHandler
 	{
 		protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
 		{
 			DataService.RegisterInitializer();
+			HangfireBootstrapper.Instance.Start();
 
 			base.ApplicationStarted(umbracoApplication, applicationContext);
 		}