protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
_printingHubProxy.OnRequestInstalledPrintersAsync = async() =>
{
var printers = Printers.GetInstalledPrinters();
_logger.LogInformation("Reporting {PrinterCount} printers to dispatcher", printers.Length);
await _printingHubProxy.SetInstalledPrintersAsync(printers);
};
_printingHubProxy.OnSpoolJobAsync = job =>
{
_queue.Add(job);
return(Task.CompletedTask);
};
await _printingHubProxy.StartAsync(stoppingToken);
_logger.LogInformation("Sending hello");
await _printingHubProxy.Hello(Assembly.GetEntryAssembly().GetName().Version.ToString(3));
var printers = Printers.GetInstalledPrinters();
_logger.LogInformation("Reporting {PrinterCount} printers to dispatcher", printers.Length);
await _printingHubProxy.SetInstalledPrintersAsync(printers);
_logger.LogInformation("Starting job processing");
foreach (var job in _queue.GetConsumingEnumerable(stoppingToken))
{
_logger.LogInformation("Got {JobSize} {ContentType} job for printer {PrinterName}", job.Content.Length, job.ContentType, job.PrinterName);
if (TryGetPrinterHandle(job.PrinterName, job.ContentType, out var printerHandle))
{
try
{
printerHandle.Print(job.Content);
}
catch (PrinterException e)
{
_logger.LogError(e, "Unable to print");
}
}
else
{
_logger.LogWarning("Unable to get printer handle");
}
}
}
