private async Task AddPendingEvent(PendingEventEntity evt)
{
// Get or create the queue for this event's subscription
// MaxDegreeOfParallelism = 1 so messages always get sent in order
var sendQueue = _sendQueueDict.GetOrAdd(evt.SubscriptionId,
new ActionBlock <PendingEventEntity>(async evt => await SendEvent(evt.Id),
new ExecutionDataflowBlockOptions {
MaxDegreeOfParallelism = 1
}));
await sendQueue.SendAsync(evt);
}
private async Task ProcessEvent(WebhookEvent evt)
{
try
{
using var scope = _scopeFactory.CreateScope();
var context = scope.ServiceProvider.GetRequiredService <PlayerContext>();
// The subscriptions to the current event
var subscriptions = await context.Webhooks
.Include(w => w.EventTypes)
.Where(w => w.EventTypes.Any(et => et.EventType == evt.Type))
.ToListAsync();
var pendingEvents = new List <PendingEventEntity>();
foreach (var subscription in subscriptions)
{
var pendingEvent = new PendingEventEntity
{
EventType = evt.Type,
SubscriptionId = subscription.Id,
Timestamp = evt.Timestamp,
Payload = JsonSerializer.Serialize(evt)
};
pendingEvents.Add(pendingEvent);
}
await context.PendingEvents.AddRangeAsync(pendingEvents);
await context.SaveChangesAsync();
pendingEvents.ForEach(async x => await AddPendingEvent(x));
}
catch (Exception ex)
{
_logger.LogError(ex, $"Exception processing Event with id = {evt?.Id}");
}
}