106 lines
3.5 KiB
C#
106 lines
3.5 KiB
C#
using DotBased.Logging;
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using Manager.App.Services.System;
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using ILogger = Microsoft.Extensions.Logging.ILogger;
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namespace Manager.App.Services;
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public abstract class ExtendedBackgroundService : BackgroundService
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{
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private TaskCompletionSource _resumeSignal = new(TaskCreationOptions.RunContinuationsAsynchronously);
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private readonly ILogger _logger;
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public ServiceState State { get; private set; } = ServiceState.Stopped;
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public CircularBuffer<ServiceEvent> ProgressEvents { get; } = new(500);
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public string Name { get; }
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public string Description { get; set; }
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public TimeSpan ExecuteInterval { get; set; }
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public ExtendedBackgroundService(string name, string description, ILogger logger, BackgroundServiceManager manager, TimeSpan? executeInterval = null)
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{
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Name = name;
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Description = description;
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_logger = logger;
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manager.RegisterService(this);
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ExecuteInterval = executeInterval ?? TimeSpan.FromMinutes(1);
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}
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protected sealed override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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State = ServiceState.Running;
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_logger.LogInformation("Initializing background service: {ServiceName}", Name);
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await InitializeAsync(stoppingToken);
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try
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{
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_logger.LogInformation("Running background service: {ServiceName}", Name);
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while (!stoppingToken.IsCancellationRequested)
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{
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if (State == ServiceState.Paused)
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{
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_resumeSignal = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
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await _resumeSignal.Task.WaitAsync(stoppingToken);
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}
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await Task.Delay(ExecuteInterval, stoppingToken);
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await ExecuteServiceAsync(stoppingToken);
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}
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}
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catch (Exception e)
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{
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if (e is not OperationCanceledException)
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{
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State = ServiceState.Faulted;
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_logger.LogError(e,"Background service {ServiceName} faulted!", Name);
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throw;
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}
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_logger.LogInformation(e,"Service {ServiceName} received cancellation", Name);
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}
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finally
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{
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State = ServiceState.Stopped;
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}
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}
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protected void LogEvent(string message, LogSeverity severity = LogSeverity.Info) => ProgressEvents.Add(new ServiceEvent(string.Intern(Name), message, DateTime.UtcNow, severity));
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public void Pause()
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{
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if (State == ServiceState.Running)
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{
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State = ServiceState.Paused;
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_logger.LogInformation("Pauses service: {ServiceName}", Name);
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}
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}
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public void Resume()
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{
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if (State == ServiceState.Paused)
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{
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State = ServiceState.Running;
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_resumeSignal.TrySetResult();
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_logger.LogInformation("Resumed service: {ServiceName}", Name);
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}
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}
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protected abstract Task InitializeAsync(CancellationToken stoppingToken);
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protected abstract Task ExecuteServiceAsync(CancellationToken stoppingToken);
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public override bool Equals(object? obj)
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{
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return obj is ExtendedBackgroundService bgService && bgService.Name.Equals(Name, StringComparison.OrdinalIgnoreCase);
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}
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public override int GetHashCode()
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{
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return Name.GetHashCode();
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}
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}
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public enum ServiceState
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{
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Stopped,
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Faulted,
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Running,
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Paused
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}
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public record struct ServiceEvent(string Source, string Message, DateTime Date, LogSeverity Severity); |