public async Task <TResponse> ExecuteAsync <TResponse>(string key, Func <CancellationToken, Task <TResponse> > action)
{
ILockObject @lock = await _lockFactory.AcquireLockAsync(key);
DateTime processStarted = DateTime.UtcNow;
try
{
using var subscribedCancellationSource = new CancellationTokenSource();
await _redisSubscriber.SubscribeAsync(
key,
(channel, _) =>
{
_logger.LogInformation(
$"A cancellation message was received for key: {key}"
);
if (!subscribedCancellationSource.IsCancellationRequested)
{
subscribedCancellationSource.Cancel();
}
}
).ConfigureAwait(false);
TResponse response = await Policy
.Handle <Exception>()
.WaitAndRetryAsync(_distributedCancellationConfiguration.MaxRetries, _ => _distributedCancellationConfiguration.MaximumRetryDelay)
.ExecuteAsync(() =>
{
return(action(subscribedCancellationSource.Token));
});
_logger.LogDebug($"Finished processing for key: {key}");
await _databaseAsync.StringIncrementAsync(key);
return(response);
}
catch (Exception ex)
{
throw new DistributedCancellationException("An exception happened", ex);
}
finally
{
await @lock.ReleaseAsync();
await _redisSubscriber.UnsubscribeAsync(key).ConfigureAwait(false);
}
}
