public class Worker : IHostedService
{
    private readonly IEnumerable<IAzureRelayListener> _listeners;
    private readonly ILogger _logger;

    public Worker(IEnumerable<IAzureRelayListener> listeners, ILogger<Worker> logger)
    {
        _listeners = listeners;
        _logger = logger;
    }

    public async Task StartAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Starting Worker");
        foreach (var listener in _listeners)
        {
            try
            {
                await listener.StartAsync();
            }
            catch (Exception e)
            {
                _logger.LogCritical(e, "Could not start listener");
            }
        }
    }

    public async Task StopAsync(CancellationToken cancellationToken)
    {
        _logger.LogInformation("Stopping Worker");
        foreach (var listener in _listeners)
        {
            try
            {
                await listener.StopAsync();
            }
            catch (Exception e)
            {
                _logger.LogWarning(e, "Could not gracefully stop listener");
            }
        }
    }
}