protected override async Task ExecuteAsync(
CancellationToken stoppingToken)
{
this.logger?.LogInformation("Queued Hosted Service is starting.");
while (!stoppingToken.IsCancellationRequested)
{
var context = await taskQueue.DequeueAsync(stoppingToken);
try
{
if (context != null)
{
_ = context.WorkItem(context.CancellationToken, context)
.ContinueWith(state =>
{
taskQueue.CleanUp(context);
semaphore.Release();
if (state.Exception != null)
{
this.logger?.LogError(
$"Error occurred executing {nameof(context)}. Ex = {state.Exception}");
}
}, stoppingToken);
await semaphore.WaitAsync(stoppingToken);
}
}
catch (Exception ex)
{
this.logger?.LogError($"Error occurred executing {nameof(context)}. Ex = {ex.Message}");
}
}
this.logger?.LogInformation("Queued Hosted Service is stopping.");
}