如何 运行 .net core 后台服务中的多个任务具有不同的定时器持续时间
How to run multiple task in background service in .net core with different timer duration
我正在创建一个辅助服务,它将 运行 作为 windows 服务。我有一个要求,我想调用两个可能有不同计时器的任务。
说 DoWork
应该每 5 分钟调用一次,DoAnotherWork
应该每 10 分钟左右调用一次。这两个任务可以 运行 并行并且互不依赖。
我能够创建任务 DoWork
,每 5 分钟可以 运行。我对如何实现另一个具有不同计时器持续时间的任务感到困惑?
public class Worker : BackgroundService
{
private readonly IServiceScopeFactory _scopeFactory;
private IDataLoaderService _dataLoaderService;
public override Task StartAsync(CancellationToken cancellationToken)
{
using var scope = _scopeFactory.CreateScope();
_dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
return base.StartAsync(cancellationToken);
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
await DoWork(stoppingToken, _dataLoaderService);
await Task.Delay(300000, stoppingToken); //Run every 5 minutes
await DoAnotherWork(stoppingToken, _dataLoaderService);
await Task.Delay(600000, stoppingToken); //Run every 10 minutes
}
}
private async Task DoWork(CancellationToken stoppingToken, IDataLoaderService loaderService)
{
await loaderService.Process();
}
private async Task DoAnotherWork(CancellationToken stoppingToken, IDataLoaderService loaderService)
{
await loaderService.Validate();
}
}
如果您不想在您的案例中使用现有的调度库,您可以使用两个计时器,例如 docs,其中使用了 System.Threading.Timer
。类似的东西:
public class Worker : IHostedService, IDisposable
{
private readonly IServiceScopeFactory _scopeFactory;
private IDataLoaderService _dataLoaderService;
private Timer _timer1;
private Timer _timer2;
public Task StartAsync(CancellationToken cancellationToken)
{
_dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
_timer1 = new Timer(DoWork, null, TimeSpan.Zero, TimeSpan.FromSeconds(300));
_timer2 = new Timer(DoAnotherWork, null, TimeSpan.Zero, TimeSpan.FromSeconds(600));
return Task.CompletedTask;
}
private async void DoWork(object _)
{
// or create scope and resolve here
await _loaderService.Process();
}
private async void DoAnotherWork(object _)
{
// or create scope and resolve here
await _loaderService.Validate();
}
public Task StopAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Timed Hosted Service is stopping.");
_timer1?.Change(Timeout.Infinite, 0);
_timer2?.Change(Timeout.Infinite, 0);
return Task.CompletedTask;
}
public void Dispose()
{
_timer1?.Dispose();
_timer2?.Dispose();
}
}
These two tasks can run in parallel and are not dependant on each other.
在我看来你有两项服务:
public class ProcessDataLoaderWorker : BackgroundService
{
private readonly IServiceScopeFactory _scopeFactory;
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
using var scope = _scopeFactory.CreateScope();
var dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
while (true)
{
await dataLoaderService.Process();
await Task.Delay(TimeSpan.FromMinutes(5), stoppingToken); //Run every 5 minutes
}
}
}
public class ValidateDataLoaderWorker : BackgroundService
{
private readonly IServiceScopeFactory _scopeFactory;
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
using var scope = _scopeFactory.CreateScope();
var dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
while (true)
{
await dataLoaderService.Validate();
await Task.Delay(TimeSpan.FromMinutes(10), stoppingToken); //Run every 10 minutes
}
}
}
我还修改了 IDataLoaderService
的使用方式,使其不在其范围之外使用,并更改了 Task.Delay
参数,使其更易于解释。
我正在创建一个辅助服务,它将 运行 作为 windows 服务。我有一个要求,我想调用两个可能有不同计时器的任务。
说 DoWork
应该每 5 分钟调用一次,DoAnotherWork
应该每 10 分钟左右调用一次。这两个任务可以 运行 并行并且互不依赖。
我能够创建任务 DoWork
,每 5 分钟可以 运行。我对如何实现另一个具有不同计时器持续时间的任务感到困惑?
public class Worker : BackgroundService
{
private readonly IServiceScopeFactory _scopeFactory;
private IDataLoaderService _dataLoaderService;
public override Task StartAsync(CancellationToken cancellationToken)
{
using var scope = _scopeFactory.CreateScope();
_dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
return base.StartAsync(cancellationToken);
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
await DoWork(stoppingToken, _dataLoaderService);
await Task.Delay(300000, stoppingToken); //Run every 5 minutes
await DoAnotherWork(stoppingToken, _dataLoaderService);
await Task.Delay(600000, stoppingToken); //Run every 10 minutes
}
}
private async Task DoWork(CancellationToken stoppingToken, IDataLoaderService loaderService)
{
await loaderService.Process();
}
private async Task DoAnotherWork(CancellationToken stoppingToken, IDataLoaderService loaderService)
{
await loaderService.Validate();
}
}
如果您不想在您的案例中使用现有的调度库,您可以使用两个计时器,例如 docs,其中使用了 System.Threading.Timer
。类似的东西:
public class Worker : IHostedService, IDisposable
{
private readonly IServiceScopeFactory _scopeFactory;
private IDataLoaderService _dataLoaderService;
private Timer _timer1;
private Timer _timer2;
public Task StartAsync(CancellationToken cancellationToken)
{
_dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
_timer1 = new Timer(DoWork, null, TimeSpan.Zero, TimeSpan.FromSeconds(300));
_timer2 = new Timer(DoAnotherWork, null, TimeSpan.Zero, TimeSpan.FromSeconds(600));
return Task.CompletedTask;
}
private async void DoWork(object _)
{
// or create scope and resolve here
await _loaderService.Process();
}
private async void DoAnotherWork(object _)
{
// or create scope and resolve here
await _loaderService.Validate();
}
public Task StopAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Timed Hosted Service is stopping.");
_timer1?.Change(Timeout.Infinite, 0);
_timer2?.Change(Timeout.Infinite, 0);
return Task.CompletedTask;
}
public void Dispose()
{
_timer1?.Dispose();
_timer2?.Dispose();
}
}
These two tasks can run in parallel and are not dependant on each other.
在我看来你有两项服务:
public class ProcessDataLoaderWorker : BackgroundService
{
private readonly IServiceScopeFactory _scopeFactory;
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
using var scope = _scopeFactory.CreateScope();
var dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
while (true)
{
await dataLoaderService.Process();
await Task.Delay(TimeSpan.FromMinutes(5), stoppingToken); //Run every 5 minutes
}
}
}
public class ValidateDataLoaderWorker : BackgroundService
{
private readonly IServiceScopeFactory _scopeFactory;
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
using var scope = _scopeFactory.CreateScope();
var dataLoaderService = scope.ServiceProvider.GetRequiredService<IDataLoaderService>();
while (true)
{
await dataLoaderService.Validate();
await Task.Delay(TimeSpan.FromMinutes(10), stoppingToken); //Run every 10 minutes
}
}
}
我还修改了 IDataLoaderService
的使用方式,使其不在其范围之外使用,并更改了 Task.Delay
参数,使其更易于解释。