async Task <List <string> > PrepareTopicHashSubscriptions(TopicHashSelector selector)
{
Dictionary <string, List <string> > topicsByPublisher;
Dictionary <string, List <string> > singleWildcardTopicsByPublisher;
Dictionary <string, List <string> > multiWildcardTopicsByPublisher;
const int NumPublishers = 1;
const int NumTopicsPerPublisher = 10000;
TopicGenerator.Generate(NumPublishers, NumTopicsPerPublisher, out topicsByPublisher, out singleWildcardTopicsByPublisher, out multiWildcardTopicsByPublisher);
var topics = topicsByPublisher.FirstOrDefault().Value;
var singleWildcardTopics = singleWildcardTopicsByPublisher.FirstOrDefault().Value;
var multiWildcardTopics = multiWildcardTopicsByPublisher.FirstOrDefault().Value;
const string ClientId = "Client1";
var logger = new Mockups.TestLogger();
var serverOptions = new MQTTnet.Server.MqttServerOptions();
var eventContainer = new MQTTnet.Server.MqttServerEventContainer();
var retainedMessagesManager = new MqttRetainedMessagesManager(eventContainer, logger);
var sessionManager = new MqttClientSessionsManager(serverOptions, retainedMessagesManager, eventContainer, logger);
_clientSession = new MQTTnet.Server.MqttSession(
ClientId,
false,
new Dictionary <object, object>(),
serverOptions,
eventContainer,
retainedMessagesManager,
sessionManager
);
List <string> topicsToSubscribe;
switch (selector)
{
case TopicHashSelector.SingleWildcard:
topicsToSubscribe = singleWildcardTopics;
break;
case TopicHashSelector.MultiWildcard:
topicsToSubscribe = multiWildcardTopics;
break;
default:
topicsToSubscribe = topics;
break;
}
foreach (var t in topicsToSubscribe)
{
var subPacket = new Packets.MqttSubscribePacket();
var filter = new Packets.MqttTopicFilter();
filter.Topic = t;
subPacket.TopicFilters.Add(filter);
await _clientSession.SubscriptionsManager.Subscribe(subPacket, default(CancellationToken));
}
return(topics);
}
/// <summary>
/// Subscribe to all topics, then run message exchange
/// </summary>
public async Task ProcessMessages(Dictionary <string, List <string> > topicsByPublisher, string topicTypeDescription)
{
var numTopics = CountTopics(topicsByPublisher);
Console.WriteLine();
Console.Write($"Subscribing to {numTopics} topics ");
ConsoleWriteInfo($"({topicTypeDescription})");
Console.WriteLine($" for {NumSubscribers} subscriber(s)...");
var stopWatch = new System.Diagnostics.Stopwatch();
stopWatch.Start();
// each subscriber subscribes to all topics, one call per topic
foreach (var subscriber in _mqttSubscriberClients)
{
foreach (var tp in topicsByPublisher)
{
var topics = tp.Value;
foreach (var topic in topics)
{
var topicFilter = new Packets.MqttTopicFilter()
{
Topic = topic
};
await subscriber.SubscribeAsync(topicFilter).ConfigureAwait(false);
}
}
}
stopWatch.Stop();
Console.Write($"{NumSubscribers} subscriber(s) subscribed in {stopWatch.ElapsedMilliseconds / 1000.0:0.000} seconds, ");
Console.WriteLine($"subscribe calls per second: {numTopics / (stopWatch.ElapsedMilliseconds / 1000.0):0.000}");
await PublishAllAsync();
Console.WriteLine($"Unsubscribing {numTopics} topics ({topicTypeDescription}) for {NumSubscribers} subscriber(s)...");
stopWatch.Restart();
// unsubscribe to all topics, one call per topic
foreach (var subscriber in _mqttSubscriberClients)
{
foreach (var tp in topicsByPublisher)
{
var topics = tp.Value;
foreach (var topic in topics)
{
var topicFilter = new Packets.MqttTopicFilter()
{
Topic = topic
};
MqttClientUnsubscribeOptions options =
new MqttClientUnsubscribeOptionsBuilder()
.WithTopicFilter(topicFilter)
.Build();
await subscriber.UnsubscribeAsync(options).ConfigureAwait(false);
}
}
}
stopWatch.Stop();
Console.Write($"{NumSubscribers} subscriber(s) unsubscribed in {stopWatch.ElapsedMilliseconds / 1000.0:0.000} seconds, ");
Console.WriteLine($"unsubscribe calls per second: {numTopics / (stopWatch.ElapsedMilliseconds / 1000.0):0.000}");
}
