I want to check that the type registrations I established in Startup.cs are all valid at runtime (either when starting up the service or as part of a test suite). There's a feature like this in Lamar and other containers.
ASP.NET Core 3.x actually introduced a feature for scope and provider validation. Both of these are useful in different contexts (see the below post and sample code).
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
})
.UseDefaultServiceProvider((context, options) =>
{
options.ValidateScopes = context.HostingEnvironment.IsDevelopment();
options.ValidateOnBuild = true;
});
https://andrewlock.net/new-in-asp-net-core-3-service-provider-validation/
You can iterate the services that you want to validate, and try to initialize a service with GetRequiredService<T>. It will throw an exception if there is something wrong. More info on
https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.serviceproviderserviceextensions.getrequiredservice?view=aspnetcore-2.2
The IServiceCollection is actually enumerable over ServiceDescriptor which contains type information on the registered service and implementation. The service collection isn't usually registered, but it should be possible to capture both the service collection and service provider in a hosted service.
Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddServicesValidation();
}
The right extension method can capture the services collection without actually registering it (which feels "safer").
public static class ValidateServicesExtensions
{
public static IServiceCollection AddServicesValidation(this IServiceCollection services)
{
services.AddHostedService<ValidateServices>(provider => new ValidateServices(services, provider));
return services;
}
}
Now, the hosted service can iterate over the registered services & implementations. Although, this code bombs on the first generic IOptions<TOption>, but I'm sure we can figure something out?
ValidateServices.cs
public class ValidateServices : BackgroundService
{
private readonly IServiceCollection services;
private readonly IServiceProvider provider;
public ValidateServices(
IServiceCollection services,
IServiceProvider provider
)
{
this.services = services;
this.provider = provider;
}
protected override Task ExecuteAsync(CancellationToken stoppingToken)
{
using var scope = provider.CreateScope();
foreach (var service in services)
{
_ = scope.ServiceProvider.GetRequiredService(service.ServiceType);
}
return Task.CompletedTask;
}
}
I have a simple ServiceStack service with some logging added.
log.Info("In Vehicle service request");
if (log.IsDebugEnabled)
log.Debug("Debugging Vehicle service request");
log is defined in a base class as follows;
public abstract class ServiceBase : Service
{
public static readonly ILog log = LogManager.GetLogger(typeof(ServiceBase));
}
The web host is configured to add various logging providers, including log4net (NOTE: I have tried others = same problem).
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.ConfigureAppConfiguration((context, config) =>
{
config.SetBasePath(Directory.GetCurrentDirectory());
config
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{context.HostingEnvironment.EnvironmentName}.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables(); //lets Azure portal override settings
context.Configuration = config.Build();
})
.ConfigureLogging((hostingContext, logging) =>
{
logging.ClearProviders();
logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
logging.AddConsole();
logging.AddDebug();
logging.AddEventSourceLogger();
logging.AddAzureWebAppDiagnostics();
// The ILoggingBuilder minimum level determines the
// the lowest possible level for logging. The log4net
// level then sets the level that we actually log at.
logging.AddLog4Net();
//logging.SetMinimumLevel(LogLevel.Debug);
})
.UseAzureAppServices()
.UseStartup<Startup>();
The ServiceStack AppHost sets the LogFactory early as follows;
public override void Configure(Container container)
{
//Also runs log4net.Config.XmlConfigurator.Configure()
LogManager.LogFactory = new Log4NetFactory(configureLog4Net: true);
..etc
What happens?
I get lovely logging if I add some in my StartUp. However the logging in the ServiceStack service does not appear when hosted in Azure. I do get logging when running locally.
So NetCore is logging ok, but anything in the Service class is not!
Why no logging with this?
public async Task<GetMyDataResponse> Any(GetMyData request)
{
log.Info("In service request");
if (log.IsDebugEnabled)
log.Debug("Debugging service request");
//Some request validation logic could/should go here.
return new GetMyDataResponse
{
Results = await _myDataRepo.FetchAsync()
};
}
In the end it was a silly routing issue, matching to a method in a Controller instead of falling into the ServiceStack route as defined on the interface model. A method I'd left hanging around when testing.
Try either configuring the LogFactory before ServiceStack isinitialized, e.g:
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
LogManager.LogFactory = new Log4NetFactory(configureLog4Net: true);
app.UseServiceStack(new AppHost
{
AppSettings = new NetCoreAppSettings(Configuration)
});
}
Or use an instance logger in your Services:
public readonly ILog log = LogManager.GetLogger(typeof(ServiceBase));
On an ASP.NET Core project, I am using SSL in Production so I have in Startup:
public void ConfigureServices(IServiceCollection services) {
services.AddMvc(x => {
x.Filters.Add(new RequireHttpsAttribute());
});
// Remaining code ...
}
public void Configure(IApplicationBuilder builder, IHostingEnvironment environment, ILoggerFactory logger, IApplicationLifetime lifetime) {
RewriteOptions rewriteOptions = new RewriteOptions();
rewriteOptions.AddRedirectToHttps();
builder.UseRewriter(rewriteOptions);
// Remaining code ...
}
It works fine in Production but not in Development. I would like to either:
Disable SSL in Development;
Make SSL work in Development because with current configuration it is not.
Do I need to set any PFX files on my local machine?
I am working on multiple projects so that might create problems?
You can configure a service using the IConfigureOptions<T> interface.
internal class ConfigureMvcOptions : IConfigureOptions<MvcOptions>
{
private readonly IHostingEnvironment _env;
public ConfigureMvcOptions(IHostingEnvironment env)
{
_env = env;
}
public void Configure(MvcOptions options)
{
if (_env.IsDevelopment())
{
options.SslPort = 44523;
}
else
{
options.Filters.Add(new RequireHttpsAttribute());
}
}
}
Then, add this class as a singleton:
public void ConfigureServices(IServiceCollection services)
{
// Add framework services.
var builder = services.AddMvc();
services.AddSingleton<IConfigureOptions<MvcOptions>, ConfigureMvcOptions>();
}
Concerning the SSL point, you can easily use SSL using IIS Express (source)
If you don't want to use IIS Express then delete the https-address in Project Properties -> Debug section -> Under "Web Server Settings" -> Uncheck "Enable SSL".
just comment this line:
rewriteOptions.AddRedirectToHttps();
or in new versions of .Net core on Startup.cs comment:
app.UseHttpsRedirection();
Using #if !DEBUG, like below:
public void ConfigureServices(IServiceCollection services) {
services.AddMvc(x => {
#if !DEBUG
x.Filters.Add(new RequireHttpsAttribute());
#endif
});
// Remaining code ...
}
I have the following class
public class MyEmailService
{
public async Task<bool> SendAdminEmails()
{
...
}
public async Task<bool> SendUserEmails()
{
...
}
}
public interface IMyEmailService
{
Task<bool> SendAdminEmails();
Task<bool> SendUserEmails();
}
I have installed the latest Quartz 2.4.1 Nuget package as I wanted a lightweight scheduler in my web app without a separate SQL Server database.
I need to schedule the methods
SendUserEmails to run every week on Mondays 17:00,Tuesdays 17:00 & Wednesdays 17:00
SendAdminEmails to run every week on Thursdays 09:00, Fridays 9:00
What code do I need to schedule these methods using Quartz in ASP.NET Core? I also need to know how to start Quartz in ASP.NET Core as all code samples on the internet still refer to previous versions of ASP.NET.
I can find a code sample for the previous version of ASP.NET but I don't know how to start Quartz in ASP.NET Core to start testing.
Where do I put the JobScheduler.Start(); in ASP.NET Core?
TL;DR (full answer can be found below)
Assumed tooling: Visual Studio 2017 RTM, .NET Core 1.1, .NET Core SDK 1.0, SQL Server Express 2016 LocalDB.
In web application .csproj:
<Project Sdk="Microsoft.NET.Sdk.Web">
<!-- .... existing contents .... -->
<!-- add the following ItemGroup element, it adds required packages -->
<ItemGroup>
<PackageReference Include="Quartz" Version="3.0.0-alpha2" />
<PackageReference Include="Quartz.Serialization.Json" Version="3.0.0-alpha2" />
</ItemGroup>
</Project>
In the Program class (as scaffolded by Visual Studio by default):
public class Program
{
private static IScheduler _scheduler; // add this field
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.UseApplicationInsights()
.Build();
StartScheduler(); // add this line
host.Run();
}
// add this method
private static void StartScheduler()
{
var properties = new NameValueCollection {
// json serialization is the one supported under .NET Core (binary isn't)
["quartz.serializer.type"] = "json",
// the following setup of job store is just for example and it didn't change from v2
// according to your usage scenario though, you definitely need
// the ADO.NET job store and not the RAMJobStore.
["quartz.jobStore.type"] = "Quartz.Impl.AdoJobStore.JobStoreTX, Quartz",
["quartz.jobStore.useProperties"] = "false",
["quartz.jobStore.dataSource"] = "default",
["quartz.jobStore.tablePrefix"] = "QRTZ_",
["quartz.jobStore.driverDelegateType"] = "Quartz.Impl.AdoJobStore.SqlServerDelegate, Quartz",
["quartz.dataSource.default.provider"] = "SqlServer-41", // SqlServer-41 is the new provider for .NET Core
["quartz.dataSource.default.connectionString"] = #"Server=(localdb)\MSSQLLocalDB;Database=Quartz;Integrated Security=true"
};
var schedulerFactory = new StdSchedulerFactory(properties);
_scheduler = schedulerFactory.GetScheduler().Result;
_scheduler.Start().Wait();
var userEmailsJob = JobBuilder.Create<SendUserEmailsJob>()
.WithIdentity("SendUserEmails")
.Build();
var userEmailsTrigger = TriggerBuilder.Create()
.WithIdentity("UserEmailsCron")
.StartNow()
.WithCronSchedule("0 0 17 ? * MON,TUE,WED")
.Build();
_scheduler.ScheduleJob(userEmailsJob, userEmailsTrigger).Wait();
var adminEmailsJob = JobBuilder.Create<SendAdminEmailsJob>()
.WithIdentity("SendAdminEmails")
.Build();
var adminEmailsTrigger = TriggerBuilder.Create()
.WithIdentity("AdminEmailsCron")
.StartNow()
.WithCronSchedule("0 0 9 ? * THU,FRI")
.Build();
_scheduler.ScheduleJob(adminEmailsJob, adminEmailsTrigger).Wait();
}
}
An example of a job class:
public class SendUserEmailsJob : IJob
{
public Task Execute(IJobExecutionContext context)
{
// an instance of email service can be obtained in different ways,
// e.g. service locator, constructor injection (requires custom job factory)
IMyEmailService emailService = new MyEmailService();
// delegate the actual work to email service
return emailService.SendUserEmails();
}
}
Full answer
Quartz for .NET Core
First, you have to use v3 of Quartz, as it targets .NET Core, according to this announcement.
Currently, only alpha versions of v3 packages are available on NuGet. It looks like the team put a lot of effort into releasing 2.5.0, which does not target .NET Core. Nevertheless, in their GitHub repo, the master branch is already dedicated to v3, and basically, open issues for v3 release don't seem to be critical, mostly old wishlist items, IMHO. Since recent commit activity is quite low, I would expect v3 release in few months, or maybe half year - but no one knows.
Jobs and IIS recycling
If the web application is going to be hosted under IIS, you have to take into consideration recycling/unloading behavior of worker processes. The ASP.NET Core web app runs as a regular .NET Core process, separate from w3wp.exe - IIS only serves as a reverse proxy. Nevertheless, when an instance of w3wp.exe is recycled or unloaded, the related .NET Core app process is also signaled to exit (according to this).
Web application can also be self-hosted behind a non-IIS reverse proxy (e.g. NGINX), but I will assume that you do use IIS, and narrow my answer accordingly.
The problems that recycling/unloading introduces are explained well in the post referenced by #darin-dimitrov:
If for example, on Friday 9:00 the process is down, because several hours earlier it was unloaded by IIS due to inactivity - no admin emails will be sent until the process is up again. To avoid that, configure IIS to minimize unloads/recyclings (see this answer).
From my experience, the above configuration still doesn't give a 100% guarantee that IIS will never unload the application. For 100% guarantee that your process is up, you can setup a command that periodically sends requests to your application, and thus keeps it alive.
When the host process is recycled/unloaded, the jobs must be gracefully stopped, to avoid data corruption.
Why would you host scheduled jobs in a web app
I can think of one justification of having those email jobs hosted in a web app, despite the problems listed above. It is decision to have only one kind of application model (ASP.NET). Such approach simplifies learning curve, deployment procedure, production monitoring, etc.
If you don't want to introduce backend microservices (which would be a good place to move the email jobs to), then it makes sense to overcome IIS recycling/unloading behaviors, and run Quartz inside a web app.
Or maybe you have other reasons.
Persistent job store
In your scenario, status of job execution must be persisted out of process. Therefore, default RAMJobStore doesn't fit, and you have to use the ADO.NET Job Store.
Since you mentioned SQL Server in the question, I will provide example setup for SQL Server database.
How to start (and gracefully stop) the scheduler
I assume you use Visual Studio 2017 and latest/recent version of .NET Core tooling. Mine is .NET Core Runtime 1.1 and .NET Core SDK 1.0.
For DB setup example, I will use a database named Quartz in SQL Server 2016 Express LocalDB. DB setup scripts can be found here.
First, add required package references to web application .csproj (or do it with NuGet package manager GUI in Visual Studio):
<Project Sdk="Microsoft.NET.Sdk.Web">
<!-- .... existing contents .... -->
<!-- the following ItemGroup adds required packages -->
<ItemGroup>
<PackageReference Include="Quartz" Version="3.0.0-alpha2" />
<PackageReference Include="Quartz.Serialization.Json" Version="3.0.0-alpha2" />
</ItemGroup>
</Project>
With the help of Migration Guide and the V3 Tutorial, we can figure out how to start and stop the scheduler. I prefer to encapsulate this in a separate class, let's name it QuartzStartup.
using System;
using System.Collections.Specialized;
using System.Threading.Tasks;
using Quartz;
using Quartz.Impl;
namespace WebApplication1
{
// Responsible for starting and gracefully stopping the scheduler.
public class QuartzStartup
{
private IScheduler _scheduler; // after Start, and until shutdown completes, references the scheduler object
// starts the scheduler, defines the jobs and the triggers
public void Start()
{
if (_scheduler != null)
{
throw new InvalidOperationException("Already started.");
}
var properties = new NameValueCollection {
// json serialization is the one supported under .NET Core (binary isn't)
["quartz.serializer.type"] = "json",
// the following setup of job store is just for example and it didn't change from v2
["quartz.jobStore.type"] = "Quartz.Impl.AdoJobStore.JobStoreTX, Quartz",
["quartz.jobStore.useProperties"] = "false",
["quartz.jobStore.dataSource"] = "default",
["quartz.jobStore.tablePrefix"] = "QRTZ_",
["quartz.jobStore.driverDelegateType"] = "Quartz.Impl.AdoJobStore.SqlServerDelegate, Quartz",
["quartz.dataSource.default.provider"] = "SqlServer-41", // SqlServer-41 is the new provider for .NET Core
["quartz.dataSource.default.connectionString"] = #"Server=(localdb)\MSSQLLocalDB;Database=Quartz;Integrated Security=true"
};
var schedulerFactory = new StdSchedulerFactory(properties);
_scheduler = schedulerFactory.GetScheduler().Result;
_scheduler.Start().Wait();
var userEmailsJob = JobBuilder.Create<SendUserEmailsJob>()
.WithIdentity("SendUserEmails")
.Build();
var userEmailsTrigger = TriggerBuilder.Create()
.WithIdentity("UserEmailsCron")
.StartNow()
.WithCronSchedule("0 0 17 ? * MON,TUE,WED")
.Build();
_scheduler.ScheduleJob(userEmailsJob, userEmailsTrigger).Wait();
var adminEmailsJob = JobBuilder.Create<SendAdminEmailsJob>()
.WithIdentity("SendAdminEmails")
.Build();
var adminEmailsTrigger = TriggerBuilder.Create()
.WithIdentity("AdminEmailsCron")
.StartNow()
.WithCronSchedule("0 0 9 ? * THU,FRI")
.Build();
_scheduler.ScheduleJob(adminEmailsJob, adminEmailsTrigger).Wait();
}
// initiates shutdown of the scheduler, and waits until jobs exit gracefully (within allotted timeout)
public void Stop()
{
if (_scheduler == null)
{
return;
}
// give running jobs 30 sec (for example) to stop gracefully
if (_scheduler.Shutdown(waitForJobsToComplete: true).Wait(30000))
{
_scheduler = null;
}
else
{
// jobs didn't exit in timely fashion - log a warning...
}
}
}
}
Note 1. In the above example, SendUserEmailsJob and SendAdminEmailsJob are classes that implement IJob. The IJob interface is slightly different from IMyEmailService, because it returns void Task and not Task<bool>. Both job classes should get IMyEmailService as a dependency (probably constructor injection).
Note 2. For a long-running job to be able to exit in timely fashion, in the IJob.Execute method, it should observe the status of IJobExecutionContext.CancellationToken. This may require change in IMyEmailService interface, to make its methods receive CancellationToken parameter:
public interface IMyEmailService
{
Task<bool> SendAdminEmails(CancellationToken cancellation);
Task<bool> SendUserEmails(CancellationToken cancellation);
}
When and where to start and stop the scheduler
In ASP.NET Core, application bootstrap code resides in class Program, much like in console app. The Main method is called to create web host, run it, and wait until it exits:
public class Program
{
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.UseApplicationInsights()
.Build();
host.Run();
}
}
The simplest thing to do is just put a call to QuartzStartup.Start right in the Main method, much like as I did in TL;DR. But since we have to properly handle process shutdown as well, I prefer to hook both startup and shutdown code in a more consistent manner.
This line:
.UseStartup<Startup>()
refers to a class named Startup, which is scaffolded when creating new ASP.NET Core Web Application project in Visual Studio. The Startup class looks like this:
public class Startup
{
public Startup(IHostingEnvironment env)
{
// scaffolded code...
}
public IConfigurationRoot Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
// scaffolded code...
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
// scaffolded code...
}
}
It is clear that a call to QuartzStartup.Start should be inserted in one of methods in the Startup class. The question is, where QuartzStartup.Stop should be hooked.
In the legacy .NET Framework, ASP.NET provided IRegisteredObject interface. According to this post, and the documentation, in ASP.NET Core it was replaced with IApplicationLifetime. Bingo. An instance of IApplicationLifetime can be injected into Startup.Configure method through a parameter.
For consistency, I will hook both QuartzStartup.Start and QuartzStartup.Stop to IApplicationLifetime:
public class Startup
{
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(
IApplicationBuilder app,
IHostingEnvironment env,
ILoggerFactory loggerFactory,
IApplicationLifetime lifetime) // added this parameter
{
// the following 3 lines hook QuartzStartup into web host lifecycle
var quartz = new QuartzStartup();
lifetime.ApplicationStarted.Register(quartz.Start);
lifetime.ApplicationStopping.Register(quartz.Stop);
// .... original scaffolded code here ....
}
// ....the rest of the scaffolded members ....
}
Note that I have extended the signature of the Configure method with an additional IApplicationLifetime parameter. According to documentation, ApplicationStopping will block until registered callbacks are completed.
Graceful shutdown on IIS Express, and ASP.NET Core module
I was able to observe expected behavior of IApplicationLifetime.ApplicationStopping hook only on IIS, with the latest ASP.NET Core module installed. Both IIS Express (installed with Visual Studio 2017 Community RTM), and IIS with an outdated version of ASP.NET Core module didn't consistently invoke IApplicationLifetime.ApplicationStopping. I believe it is because of this bug that was fixed.
You can install latest version of ASP.NET Core module from here. Follow the instructions in the "Installing the latest ASP.NET Core Module" section.
Quartz vs. FluentScheduler
I also took a look at FluentScheduler, as it was proposed as an alternative library by #Brice Molesti. To my first impression, FluentScheduler is quite a simplistic and immature solution, compared to Quartz. For example, FluentScheduler doesn't provide such fundamental features as job status persistence and clustered execution.
In addition to #felix-b answer. Adding DI to jobs. Also QuartzStartup Start can be made async.
Based on this answer: https://stackoverflow.com/a/42158004/1235390
public class QuartzStartup
{
public QuartzStartup(IServiceProvider serviceProvider)
{
_serviceProvider = serviceProvider;
}
public async Task Start()
{
// other code is same
_scheduler = await schedulerFactory.GetScheduler();
_scheduler.JobFactory = new JobFactory(_serviceProvider);
await _scheduler.Start();
var sampleJob = JobBuilder.Create<SampleJob>().Build();
var sampleTrigger = TriggerBuilder.Create().StartNow().WithCronSchedule("0 0/1 * * * ?").Build();
await _scheduler.ScheduleJob(sampleJob, sampleTrigger);
}
}
JobFactory class
public class JobFactory : IJobFactory
{
private IServiceProvider _serviceProvider;
public JobFactory(IServiceProvider serviceProvider)
{
_serviceProvider = serviceProvider;
}
public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
{
return _serviceProvider.GetService(bundle.JobDetail.JobType) as IJob;
}
public void ReturnJob(IJob job)
{
(job as IDisposable)?.Dispose();
}
}
Startup class:
public void ConfigureServices(IServiceCollection services)
{
// other code is removed for brevity
// need to register all JOBS by their class name
services.AddTransient<SampleJob>();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IApplicationLifetime applicationLifetime)
{
var quartz = new QuartzStartup(_services.BuildServiceProvider());
applicationLifetime.ApplicationStarted.Register(() => quartz.Start());
applicationLifetime.ApplicationStopping.Register(quartz.Stop);
// other code removed for brevity
}
SampleJob class with contructor dependency injection:
public class SampleJob : IJob
{
private readonly ILogger<SampleJob> _logger;
public SampleJob(ILogger<SampleJob> logger)
{
_logger = logger;
}
public async Task Execute(IJobExecutionContext context)
{
_logger.LogDebug("Execute called");
}
}
I don't know how to do it with Quartz, but i had experimented the same scenario with an other library wich works very well. Here how I dit it
Install FluentScheduler
Install-Package FluentScheduler
Use it like this
var registry = new Registry();
JobManager.Initialize(registry);
JobManager.AddJob(() => MyEmailService.SendAdminEmails(), s => s
.ToRunEvery(1)
.Weeks()
.On(DayOfWeek.Monday)
.At(17, 00));
JobManager.AddJob(() => MyEmailService.SendAdminEmails(), s => s
.ToRunEvery(1)
.Weeks()
.On(DayOfWeek.Wednesday)
.At(17, 00));
JobManager.AddJob(() => MyEmailService.SendUserEmails(), s => s
.ToRunEvery(1)
.Weeks()
.On(DayOfWeek.Thursday)
.At(09, 00));
JobManager.AddJob(() => MyEmailService.SendUserEmails(), s => s
.ToRunEvery(1)
.Weeks()
.On(DayOfWeek.Friday)
.At(09, 00));
Documentation can be found here FluentScheduler on GitHub
What code do I need to schedule these methods using Quartz in ASP.NET Core? I also need to know how to start Quartz in ASP.NET Core as all code samples on the internet still refer to previous versions of ASP.NET.
Hi, there is now a good quartz DI to initialize and use
[DisallowConcurrentExecution]
public class Job1 : IJob
{
private readonly ILogger<Job1> _logger;
public Job1(ILogger<Job1> logger)
{
_logger = logger;
}
public async Task Execute(IJobExecutionContext context)
{
_logger.LogInformation("Start job1");
await Task.Delay(2, context.CancellationToken);
_logger?.LogInformation("End job1");
}
}
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddQuartz(cfg =>
{
cfg.UseMicrosoftDependencyInjectionJobFactory(opt =>
{
opt.AllowDefaultConstructor = false;
});
cfg.AddJob<Job1>(jobCfg =>
{
jobCfg.WithIdentity("job1");
});
cfg.AddTrigger(trigger =>
{
trigger
.ForJob("job1")
.WithIdentity("trigger1")
.WithSimpleSchedule(x => x
.WithIntervalInSeconds(10)
.RepeatForever());
});
});
services.AddQuartzHostedService(opt =>
{
opt.WaitForJobsToComplete = true;
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
// standart impl
}
}
The accepted answer covers the topic very well, but some things have changed with the latest Quartz version. The following is based on this article shows a quick start with Quartz 3.0.x and ASP.NET Core 2.2:
Util class
public class QuartzServicesUtilities
{
public static void StartJob<TJob>(IScheduler scheduler, TimeSpan runInterval)
where TJob : IJob
{
var jobName = typeof(TJob).FullName;
var job = JobBuilder.Create<TJob>()
.WithIdentity(jobName)
.Build();
var trigger = TriggerBuilder.Create()
.WithIdentity($"{jobName}.trigger")
.StartNow()
.WithSimpleSchedule(scheduleBuilder =>
scheduleBuilder
.WithInterval(runInterval)
.RepeatForever())
.Build();
scheduler.ScheduleJob(job, trigger);
}
}
Job factory
public class QuartzJobFactory : IJobFactory
{
private readonly IServiceProvider _serviceProvider;
public QuartzJobFactory(IServiceProvider serviceProvider)
{
_serviceProvider = serviceProvider;
}
public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
{
var jobDetail = bundle.JobDetail;
var job = (IJob)_serviceProvider.GetService(jobDetail.JobType);
return job;
}
public void ReturnJob(IJob job) { }
}
A job sample that also deals with exiting on application pool recycle / exit
[DisallowConcurrentExecution]
public class TestJob : IJob
{
private ILoggingService Logger { get; }
private IApplicationLifetime ApplicationLifetime { get; }
private static object lockHandle = new object();
private static bool shouldExit = false;
public TestJob(ILoggingService loggingService, IApplicationLifetime applicationLifetime)
{
Logger = loggingService;
ApplicationLifetime = applicationLifetime;
}
public Task Execute(IJobExecutionContext context)
{
return Task.Run(() =>
{
ApplicationLifetime.ApplicationStopping.Register(() =>
{
lock (lockHandle)
{
shouldExit = true;
}
});
try
{
for (int i = 0; i < 10; i ++)
{
lock (lockHandle)
{
if (shouldExit)
{
Logger.LogDebug($"TestJob detected that application is shutting down - exiting");
break;
}
}
Logger.LogDebug($"TestJob ran step {i+1}");
Thread.Sleep(3000);
}
}
catch (Exception exc)
{
Logger.LogError(exc, "An error occurred during execution of scheduled job");
}
});
}
}
Startup.cs configuration
private void ConfigureQuartz(IServiceCollection services, params Type[] jobs)
{
services.AddSingleton<IJobFactory, QuartzJobFactory>();
services.Add(jobs.Select(jobType => new ServiceDescriptor(jobType, jobType, ServiceLifetime.Singleton)));
services.AddSingleton(provider =>
{
var schedulerFactory = new StdSchedulerFactory();
var scheduler = schedulerFactory.GetScheduler().Result;
scheduler.JobFactory = provider.GetService<IJobFactory>();
scheduler.Start();
return scheduler;
});
}
protected void ConfigureJobsIoc(IServiceCollection services)
{
ConfigureQuartz(services, typeof(TestJob), /* other jobs come here */);
}
public void ConfigureServices(IServiceCollection services)
{
ConfigureJobsIoc(services);
// other stuff comes here
AddDbContext(services);
AddCors(services);
services
.AddMvc()
.SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
}
protected void StartJobs(IApplicationBuilder app, IApplicationLifetime lifetime)
{
var scheduler = app.ApplicationServices.GetService<IScheduler>();
//TODO: use some config
QuartzServicesUtilities.StartJob<TestJob>(scheduler, TimeSpan.FromSeconds(60));
lifetime.ApplicationStarted.Register(() => scheduler.Start());
lifetime.ApplicationStopping.Register(() => scheduler.Shutdown());
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory,
ILoggingService logger, IApplicationLifetime lifetime)
{
StartJobs(app, lifetime);
// other stuff here
}