change background tasks package

News site.csproj

@@ -10,6 +10,9 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Hangfire.AspNetCore" Version="1.7.33" />
+    <PackageReference Include="Hangfire.Core" Version="1.7.33" />
+    <PackageReference Include="Hangfire.PostgreSql" Version="1.8.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.32" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.30" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.30">

Services/Cronbot.cs

@@ -16,12 +16,8 @@ namespace News_site.Services
 			_logger = logger;
 		}
 
-		public async Task DoCrawlData(CancellationToken cancellationToken)
+		public async Task DoCrawlData()
 		{
-			while (!cancellationToken.IsCancellationRequested)
-			{
-				/* 30 minutes */
-				var duration = 1000 * 60 * 30;
 			var startCrawlingTime = DateTime.Now;
 			_logger.LogInformation($"Start crawling at: {startCrawlingTime:HH:mm}");
 
@@ -30,9 +26,6 @@ namespace News_site.Services
 
 			var stopCrawlingTime = DateTime.Now;
 			_logger.LogInformation($"Stop task, crawling in {(stopCrawlingTime - startCrawlingTime).TotalSeconds} seconds");
-
-				await Task.Delay(duration);
-			}
 		}
 	}
 }

Services/CronjobService.cs

@@ -17,7 +17,6 @@ namespace News_site.Services
 
 		protected override async Task ExecuteAsync(CancellationToken stoppingToken)
 		{
-			await _cronbot.DoCrawlData(stoppingToken);
 		}
 	}
 }

Services/ICronbot.cs

@@ -5,6 +5,6 @@ namespace News_site.Services
 {
 	public interface ICronbot
 	{
-		Task DoCrawlData(CancellationToken cancellationToken);
+		Task DoCrawlData();
 	}
 }
\ No newline at end of file

Startup.cs

@@ -8,6 +8,9 @@ using News_site.Data;
 using News_site.Services;
 using Sieve.Models;
 using Sieve.Services;
+using Hangfire;
+using Hangfire.PostgreSql;
+using System;
 
 namespace News_site
 {
@@ -36,10 +39,17 @@ namespace News_site
 				});
 			});
 
+			services.AddHangfire(configuration => configuration
+					.SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
+					.UseSimpleAssemblyNameTypeSerializer()
+					.UseRecommendedSerializerSettings()
+					.UsePostgreSqlStorage(Configuration.GetConnectionString("HangfireConnection"), new PostgreSqlStorageOptions()));
+
+			services.AddHangfireServer();
+
 			services.Configure<SieveOptions>(Configuration.GetSection("Sieve"));
 
 			services.AddSingleton<ICronbot, Cronbot>();
-			services.AddHostedService<CronjobService>();
 			services.AddScoped<SieveProcessor>();
 			services.AddDbContext<DataContext>();
 
@@ -57,7 +67,13 @@ namespace News_site
 		}
 
 		// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-		public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
+		public void Configure(
+			IApplicationBuilder app, 
+			IBackgroundJobClient backgroundJobs, 
+			IWebHostEnvironment env, 
+			IRecurringJobManager recurringJobManager, 
+			IServiceProvider serviceProvider
+		)
 		{
 			app.UseSwagger();
 
@@ -71,6 +87,9 @@ namespace News_site
 				app.UseDeveloperExceptionPage();
 			}
 
+			app.UseHangfireDashboard();
+			recurringJobManager.AddOrUpdate("Crawl Data every 30 minutes", () => serviceProvider.GetService<ICronbot>().DoCrawlData(), "*/30 * * * *", TimeZoneInfo.Local);
+
 			app.UseHttpsRedirection();
 
 			app.UseRouting();
@@ -82,6 +101,7 @@ namespace News_site
 			app.UseEndpoints(endpoints =>
 			{
 				endpoints.MapControllers();
+				endpoints.MapHangfireDashboard();
 			});
 		}
 	}

appsettings.json

 {
+  "ConnectionStrings": {
+    "HangfireConnection": "{YOUR CONNECTION STRING}"
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",
+      "Hangfire": "Information",
       "Microsoft": "Warning",
       "Microsoft.Hosting.Lifetime": "Information"
     }