I have a service class that has a method like
public void BackgroundJob(string cronrule)
{
RecurringJob.AddOrUpdate("somejob", () => FetchCallHistoryAsync(), cronrule);
}
I want to put start the job in the startup, something like this
public void ConfigureServices(IServiceCollection services)
{
...
new MyClass().BackgroundJob("10 * * * *")
}
But my class depends on several other services, I don't know how to instantiate it from Startup.cs, any idea?
Okay I found a way
For any cases that you need to instantiate a service at startup, you register it at ConfigureServices(IServiceCollection services) and then inject it in Configure(YourService yserv)
For my special case I created a CrontabService
namespace MyApp
{
public class CrontabService
{
private DependentService D;
public CrontabService(DependentService d)
{
D = d
}
public Start()
{
RecurringJob.AddOrUpdate("some-id", () => D.Job(), "*/15 * * * *");
}
}
}
This way all my crontab jobs stay on the same service.
Then I start it at Startup.cs::Configure
// Startup.cs
public void ConfigureServices(IServiceCollection services)
{
...
services.AddSingleton<DepedentService>();
services.AddSingleton<CrontabService>();
}
...
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IServiceProvider serviceProvider, CrontabService cron)
{
...
cron.Start();
...
}
...
For asp.net core 6:
var app = builder.Build();
using (var serviceScope = app.Services.CreateScope())
{
var services = serviceScope.ServiceProvider;
var jobService = services.GetRequiredService<IJobsService>();
RecurringJob.AddOrUpdate("Shred Old Records", () => jobService.AutoShredOldReports(), Cron.Weekly);
}