protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
if (MAX_PER_PERIOD < MAX_ACTION_CONCURRENT)
{
throw new Exception("The MAX_PER_PERIOD should be more or equal to MAX_ACTION_CONCURRENT");
}
try
{
while (true)
{
// waiting an opportunity to run an action
await _semaphoreSlimAction.WaitAsync(stoppingToken);
// waiting the last period to end
await _semaphoreSlimPeriod.WaitAsync(stoppingToken);
var hasMoreInThisMinute = false;
try
{
using var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromMinutes(5));
using var cancellationTokenLinked = CancellationTokenSource.CreateLinkedTokenSource(stoppingToken, cancellationTokenSource.Token);
_logger.LogDebug("Executing");
hasMoreInThisMinute = await _feedService.DequeueProcessAndCheckIfContinueAsync(cancellationTokenLinked.Token);
_logger.LogDebug("Executed and {debugText} more items", hasMoreInThisMinute ? "has" : "hasn'nt");
_ = Task.Delay(PERIOD).ContinueWith(task =>
{
_logger.LogDebug("Release period sempahore");
_semaphoreSlimPeriod.Release(1);
if (!hasMoreInThisMinute)
{
_logger.LogDebug("Release action sempahore after no more items");
_semaphoreSlimAction.Release(1);
}
});
}
catch (Exception ex)
{
_logger.LogError("An error has occurred when processing the feed: `{exMessage}`.", ex.Message);
}
finally
{
if (hasMoreInThisMinute)
{
_logger.LogDebug("Release action sempahore");
_semaphoreSlimAction.Release(1);
}
}
}
}
catch (Exception ex)
{
_logger.LogCritical("BackgroundWorker stopped by error `{exMessage}`.", ex.Message);
throw;
}
}