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How make data from a HostedService available in my Pipeline

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0

I used this example to create a timed background task. Using this background task I have a value that is updated every x seconds, which works fine.

However, I want to be able to use this value in my middleware pipeline. How is this achieved? Can I used someting like a global variable or reference the HostedService in some way?

Timed background service

Started using ConfigureServices
services.AddHostedService<<>>();

public class TimerService : IHostedService, IDisposable
 
 private readonly ILogger _logger;
 private Timer _timer;

 public TimerService (ILogger<TimerService> logger)
 
 _logger = logger;
 

 public Task StartAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is starting.");

 _timer = new Timer(DoWork, null, TimeSpan.Zero,
 TimeSpan.FromSeconds(1));

 return Task.CompletedTask;
 

 private async void DoWork(object state)
 
 //Do your stuff here
 await Task.Delay(50);
 _logger.LogInformation("Timed Background Service is executing.");
 

 public Task StopAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is stopping.");

 _timer?.Change(Timeout.Infinite, 0);

 return Task.CompletedTask;
 

 public void Dispose()
 
 _timer?.Dispose();
 
 

Middleware pipeline

started using Configure

 public async Task Invoke(HttpContext context, ILogger<APIKeyHandler> logger, IConfiguration configuration)
 
 _logger = logger;

 bool KeyInHeader = context.Request.Headers.ContainsKey("Key");

 if (KeyInHeader)
 
 if (context.Request.Headers["Key"] = *!!VALUE COLLECTED USING THE TimerService*!!)
 
 context.Response.StatusCode = (int)HttpStatusCode.NoContent;
 await context.Response.WriteAsync($"Executed");
 
 
 

There is currently no way to get the values from the TimerService. I would like to be able to reference Timerservice.LatestValue or something. If this is not the way to I would love to get some directions.

asp.net-core-2.1

share|improve this question

asked Mar 28 at 19:44

user158936user158936

111 bronze badge

add a comment
 | 

0

I used this example to create a timed background task. Using this background task I have a value that is updated every x seconds, which works fine.

However, I want to be able to use this value in my middleware pipeline. How is this achieved? Can I used someting like a global variable or reference the HostedService in some way?

Timed background service

Started using ConfigureServices
services.AddHostedService<<>>();

public class TimerService : IHostedService, IDisposable
 
 private readonly ILogger _logger;
 private Timer _timer;

 public TimerService (ILogger<TimerService> logger)
 
 _logger = logger;
 

 public Task StartAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is starting.");

 _timer = new Timer(DoWork, null, TimeSpan.Zero,
 TimeSpan.FromSeconds(1));

 return Task.CompletedTask;
 

 private async void DoWork(object state)
 
 //Do your stuff here
 await Task.Delay(50);
 _logger.LogInformation("Timed Background Service is executing.");
 

 public Task StopAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is stopping.");

 _timer?.Change(Timeout.Infinite, 0);

 return Task.CompletedTask;
 

 public void Dispose()
 
 _timer?.Dispose();
 
 

Middleware pipeline

started using Configure

 public async Task Invoke(HttpContext context, ILogger<APIKeyHandler> logger, IConfiguration configuration)
 
 _logger = logger;

 bool KeyInHeader = context.Request.Headers.ContainsKey("Key");

 if (KeyInHeader)
 
 if (context.Request.Headers["Key"] = *!!VALUE COLLECTED USING THE TimerService*!!)
 
 context.Response.StatusCode = (int)HttpStatusCode.NoContent;
 await context.Response.WriteAsync($"Executed");
 
 
 

There is currently no way to get the values from the TimerService. I would like to be able to reference Timerservice.LatestValue or something. If this is not the way to I would love to get some directions.

asp.net-core-2.1

share|improve this question

asked Mar 28 at 19:44

user158936user158936

111 bronze badge

add a comment
 | 

I used this example to create a timed background task. Using this background task I have a value that is updated every x seconds, which works fine.

However, I want to be able to use this value in my middleware pipeline. How is this achieved? Can I used someting like a global variable or reference the HostedService in some way?

Timed background service

Started using ConfigureServices
services.AddHostedService<<>>();

public class TimerService : IHostedService, IDisposable
 
 private readonly ILogger _logger;
 private Timer _timer;

 public TimerService (ILogger<TimerService> logger)
 
 _logger = logger;
 

 public Task StartAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is starting.");

 _timer = new Timer(DoWork, null, TimeSpan.Zero,
 TimeSpan.FromSeconds(1));

 return Task.CompletedTask;
 

 private async void DoWork(object state)
 
 //Do your stuff here
 await Task.Delay(50);
 _logger.LogInformation("Timed Background Service is executing.");
 

 public Task StopAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is stopping.");

 _timer?.Change(Timeout.Infinite, 0);

 return Task.CompletedTask;
 

 public void Dispose()
 
 _timer?.Dispose();
 
 

Middleware pipeline

started using Configure

 public async Task Invoke(HttpContext context, ILogger<APIKeyHandler> logger, IConfiguration configuration)
 
 _logger = logger;

 bool KeyInHeader = context.Request.Headers.ContainsKey("Key");

 if (KeyInHeader)
 
 if (context.Request.Headers["Key"] = *!!VALUE COLLECTED USING THE TimerService*!!)
 
 context.Response.StatusCode = (int)HttpStatusCode.NoContent;
 await context.Response.WriteAsync($"Executed");
 
 
 

There is currently no way to get the values from the TimerService. I would like to be able to reference Timerservice.LatestValue or something. If this is not the way to I would love to get some directions.

asp.net-core-2.1

share|improve this question

asked Mar 28 at 19:44

user158936user158936

111 bronze badge

public class TimerService : IHostedService, IDisposable
 
 private readonly ILogger _logger;
 private Timer _timer;

 public TimerService (ILogger<TimerService> logger)
 
 _logger = logger;
 

 public Task StartAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is starting.");

 _timer = new Timer(DoWork, null, TimeSpan.Zero,
 TimeSpan.FromSeconds(1));

 return Task.CompletedTask;
 

 private async void DoWork(object state)
 
 //Do your stuff here
 await Task.Delay(50);
 _logger.LogInformation("Timed Background Service is executing.");
 

 public Task StopAsync(CancellationToken cancellationToken)
 
 _logger.LogInformation("Timed Background Service is stopping.");

 _timer?.Change(Timeout.Infinite, 0);

 return Task.CompletedTask;
 

 public void Dispose()
 
 _timer?.Dispose();
 
 

 public async Task Invoke(HttpContext context, ILogger<APIKeyHandler> logger, IConfiguration configuration)
 
 _logger = logger;

 bool KeyInHeader = context.Request.Headers.ContainsKey("Key");

 if (KeyInHeader)
 
 if (context.Request.Headers["Key"] = *!!VALUE COLLECTED USING THE TimerService*!!)
 
 context.Response.StatusCode = (int)HttpStatusCode.NoContent;
 await context.Response.WriteAsync($"Executed");
 
 
 

share|improve this question

asked Mar 28 at 19:44

user158936user158936

111 bronze badge

share|improve this question

asked Mar 28 at 19:44

user158936user158936

111 bronze badge

asked Mar 28 at 19:44

user158936user158936

111 bronze badge

asked Mar 28 at 19:44

user158936user158936

111 bronze badge