public static EventConsumptionWorker CreateWorker(IEventConsumerAsync consumer, string subscriptionName, bool batched)
{
var worker = new EventConsumptionWorker(
eventConsumer: consumer,
subscriptionName: subscriptionName,
logger: serviceProvider.GetRequiredService <ILoggerFactory>().CreateLogger <EventConsumptionWorker>(),
batchSize: batched ? 300 : 1,
consumeModel: batched ? ConsumeModel.Batch : ConsumeModel.Single,
consumeAction: !batched ? async(ceW) =>
{
//Console.WriteLine($"Consumed {ceW.Id} from thread {System.Threading.Thread.CurrentThread.ManagedThreadId}.");
await Task.Delay(1); // Some processing delay
//if (DateTime.UtcNow.Millisecond < 50)
// throw new Exception("This exception was unhandled by the ConsumeAction.");
//if (DateTime.UtcNow.Millisecond > 900)
// return ConsumeResult.MustRetry("ConsumeAction decided this event has to be retried.");
return(ConsumeResult.Succeeded);
} : default(Func <ConsumableEvent, Task <ConsumeResult> >),
consumeBatchAction: batched ? async(ces) =>
{
await Task.Delay(ces.Count());
return(ces
.Select(ce => new KeyValuePair <Int64, ConsumeResult>(ce.Id, ConsumeResult.Succeeded)) // Return success for all
.ToDictionary(kvp => kvp.Key, kvp => kvp.Value));
} : default(Func <IEnumerable <ConsumableEvent>, Task <IDictionary <Int64, ConsumeResult> > >)
);
return(worker);
}
public static void Main(string[] args)
{
var serviceCollection = new ServiceCollection();
ConfigureServices(serviceCollection);
serviceProvider = serviceCollection.BuildServiceProvider();
var publisher = serviceProvider.GetRequiredService <IEventPublisherAsync>();
var consumer = serviceProvider.GetRequiredService <IEventConsumerAsync>();
// Make sure the topic exists
var topic1 = publisher.GetTopicByNameAsync("Demo Topic 1").GetAwaiter().GetResult() ?? publisher.AddOrUpdateTopicAsync(new Topic {
Name = "Demo Topic 1", Log = false
}).GetAwaiter().GetResult();
var subscription1 = consumer.GetSubscriptionByNameAsync("Demo Subscription 1").GetAwaiter().GetResult();
subscription1 = consumer.AddOrUpdateSubscriptionAsync(new Subscription
{
Id = subscription1 != null ? subscription1.Id.Value : default(Int64?),
Name = "Demo Subscription 1",
MaxDeliveries = 2, // Not too many delivery attempts
DeliveryDelay = 2, // Deliverydelay, so that events cannot overtake eachother while publishing (because of IO latency of the DB)
Ordered = !BATCHED, // Batched processing of ordered subscription is usually not very usefull
LogConsumed = true,
TopicSubscriptions = new List <TopicSubscription>
{
new TopicSubscription
{
TopicId = topic1.Id.Value, Enabled = true,
},
},
}).GetAwaiter().GetResult();
//var te = publisher.PublishAsync(topic1.Name, payload: "ŻŹŶŴŲŰŮŬŪŨŦŤŢŠŞŜŚŘŖŔŐŎŌŊŇŅŃŁĿĽĻĹĶĴĮĬĪĨĦĤĢĠĞĜĚĘĖĔĒĐĎČĊĈĆĄĂĀŸÝÜÛÚÙØÖÕÔÓÒÑÏÎÍÌËÊÉÈÇÅÄÃÂ").GetAwaiter().GetResult();
//Thread.Sleep(TimeSpan.FromSeconds(3)); // Must be equal or more than the delivery delay!
//var ce = consumer.ConsumeNextAsync(subscription1.Name).GetAwaiter().GetResult().FirstOrDefault();
//if (ce != null)
// consumer.MarkConsumedAsync(ce.Id, ce.DeliveryKey).GetAwaiter().GetResult();
var workers = new EventConsumptionWorker[WORKER_COUNT];
for (int i = 0; i < WORKER_COUNT; i++)
{
workers[i] = CreateWorker(consumer, "Demo Subscription 1", BATCHED);
workers[i].Start();
}
// Generate data WHILE also consuming (just like the real world)
if (GENERATE_DATA)
{
var sw = new Stopwatch();
sw.Start();
var arrLen = 500;
var nrs = new List <int>(arrLen);
for (int i = 0; i < arrLen; i++)
{
nrs.Add(i);
}
;
nrs.AsParallel().ForAll((i) =>
Task.Run(async() => // Threadpool task to wait for async parts in inner task
{
Console.WriteLine($"Run {i:D4} - Start [{Thread.CurrentThread.ManagedThreadId}]");
for (int fk = 1; fk <= 10; fk++) // 1000 different functional keys, 4 TopicEvents per fk
{
await Task.Delay(1).ConfigureAwait(false);
var fkAsString = i.ToString();
try
{
await publisher.PublishAsync(topic1.Name, functionalKey: fkAsString, payload: "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"); // 100 bytes
}
catch (Exception) { } // Ignore repo-exceptions (probably deadlocks)
}
Console.WriteLine($"Run {i:D4} - Finish [{Thread.CurrentThread.ManagedThreadId}]");
}
).GetAwaiter().GetResult() // Block until all async work is done (ForAll does not await on Task as result-type)
);
sw.Stop();
Console.WriteLine($"Total time for publishing: {sw.Elapsed.TotalSeconds} sec");
}
// Wait for a user to press Ctrl+C or when windows sends the stop process signal
Console.WriteLine("Press Ctrl+C to stop the worker(s)...");
var handle = new ManualResetEvent(false);
Console.CancelKeyPress += (s, e) => { handle.Set(); e.Cancel = true; }; // Cancel must be true, to make sure the process is not killed and we can clean up nicely below
handle.WaitOne();
for (int i = 0; i < WORKER_COUNT; i++)
{
if (workers[i].IsRunning())
{
workers[i].Stop();
}
}
// Some housekeeping to clean up overtaken events etc.
publisher.PerformHouseKeepingTasksAsync().GetAwaiter().GetResult();
}