BackgroundService - Is it possible to set parameter value?

Question

BackgroundService - Is it possible to set parameter value?

Cenk 1,051

Hi,

I have a background service. I wonder if it is possible to set a parameter to this service from the Blazor Server application or in any other way?

Thank you in advance.

Anonymous

2023-02-03T07:02:40.0166667+00:00

if it is possible to set a parameter to this service from the Blazor Server application or in any other way?

Can you explain more detail information? It is better to create a simple sample with some code, so that it is easier for us to understand what you want?

Cenk 1,051

I actually want to set the periodic timer externally, not manually in the worker.

public class Worker : BackgroundService
    {
        private readonly ILogger<Worker> _logger;
        private readonly IHttpClientFactory _httpClientFactory;
        private readonly IConfiguration _configuration;

        public Worker(ILogger<Worker> logger, IHttpClientFactory httpClientFactory, IConfiguration configuration)
        {
            _logger = logger;
            _httpClientFactory = httpClientFactory;
            _configuration = configuration;
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            ///Random Timer
            var timer = new PeriodicTimer(TimeSpan.FromMinutes(new Random().Next(1, 3)));
            _logger.LogInformation("Timer: {timer}", DateTimeOffset.Now);
            while (await timer.WaitForNextTickAsync(stoppingToken))
            {
                await GetData();
                _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
            }
        }

Anonymous

2023-02-06T09:40:38.0033333+00:00

Try to store the timer timespan in the configure file (appsettings.json) file or database, then when start the background service get the timespan and use it. In this scenario, you can edit the timer timespan in the configure file or database.
Cenk 1,051 Reputation points

2023-02-06T10:19:31.34+00:00

Do I have to restart the worker every time I change the timespan?
Anonymous

2023-02-07T06:31:00.82+00:00

Do I have to restart the worker every time I change the timespan?

Yes, you have to restart the worker.

Besides, you can refer to Edward's reply in this thread to start/stop the worker manually:

ASP.NET Core IHostedService manual start/stop/pause(?)

1 answer

Your answer

Anonymous

2023-02-03T07:02:40.0166667+00:00

if it is possible to set a parameter to this service from the Blazor Server application or in any other way?

Can you explain more detail information? It is better to create a simple sample with some code, so that it is easier for us to understand what you want?
Cenk 1,051 Reputation points

2023-02-04T10:15:19.72+00:00

I actually want to set the periodic timer externally, not manually in the worker.

public class Worker : BackgroundService { private readonly ILogger<Worker> _logger; private readonly IHttpClientFactory _httpClientFactory; private readonly IConfiguration _configuration; public Worker(ILogger<Worker> logger, IHttpClientFactory httpClientFactory, IConfiguration configuration) { _logger = logger; _httpClientFactory = httpClientFactory; _configuration = configuration; } protected override async Task ExecuteAsync(CancellationToken stoppingToken) { ///Random Timer var timer = new PeriodicTimer(TimeSpan.FromMinutes(new Random().Next(1, 3))); _logger.LogInformation("Timer: {timer}", DateTimeOffset.Now); while (await timer.WaitForNextTickAsync(stoppingToken)) { await GetData(); _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now); } }
Anonymous

2023-02-06T09:40:38.0033333+00:00

Try to store the timer timespan in the configure file (appsettings.json) file or database, then when start the background service get the timespan and use it. In this scenario, you can edit the timer timespan in the configure file or database.
Cenk 1,051 Reputation points

2023-02-06T10:19:31.34+00:00

Do I have to restart the worker every time I change the timespan?
Anonymous

2023-02-07T06:31:00.82+00:00

Do I have to restart the worker every time I change the timespan?

Yes, you have to restart the worker.

Besides, you can refer to Edward's reply in this thread to start/stop the worker manually:

ASP.NET Core IHostedService manual start/stop/pause(?)

Answer 1

Bruce (SqlWork.com) 82,686 Volunteer Moderator

if the background service is in the same application, then just use a shared collection (queue):

https://learn.microsoft.com/en-us/dotnet/api/system.collections.concurrent.concurrentqueue-1?view=net-7.0

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BackgroundService - Is it possible to set parameter value?

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