private async Task ProcessEvent(string eventName, string message)
{
if (_subscriptionsManager.HasSubscriptionsForEvent(eventName))
{
var subscriptionInfos = _subscriptionsManager.GetHandlersForEvent(eventName);
foreach (var subInfo in subscriptionInfos)
{
var handler = _serviceProvider.GetService(subInfo.HandlerServiceType);
if (subInfo.IsDynamic)
{
dynamic eventData = JsonObject.Parse(message);
await(handler as IDynamicIntegrationEventHandler).Handle(eventData);
}
else
{
var eventType = _subscriptionsManager.GetEventTypeByName(eventName);
var integrationEvent = JsonSerializer.DeserializeFromString(message, eventType);
var intHandler = handler as IIntegrationEventHandler;
var concreteType = typeof(IIntegrationEventHandler <>).MakeGenericType(eventType);
await(Task) concreteType.GetMethod("Handle").Invoke(intHandler, new[] { integrationEvent });
}
}
}
}
public void Subscribe <T, TH>() where T : IntegrationEvent where TH : IIntegrationEventHandler <T>
{
var eventName = _subscriptionsManager.GetEventKey <T>();
if (!_persistentConnection.IsConnected)
{
_persistentConnection.TryConnect();
}
var hasSubs = _subscriptionsManager.HasSubscriptionsForEvent(eventName);
if (!hasSubs)
{
using (var channel = _persistentConnection.CreateModel())
{
channel.QueueBind(_queueName,
exchange: _brokerName,
routingKey: eventName);
}
}
_logger.LogInformation("Subscribing to event {EventName} with {EventHandler}", eventName, typeof(TH).Name);
_subscriptionsManager.AddSubscription <T, TH>();
StartBasicConsume();
}
public async Task <MqttClientSubscribeResult> SubscribeAsync(SubscriptionInfo subscriptionInfo, CancellationToken cancellationToken = default)
{
string topic = subscriptionInfo?.Topic;
_logger.LogInformation($"Subscribing to topic {topic} with {subscriptionInfo?.ConsumerType?.Name}");
var containsKey = _subsManager.HasSubscriptionsForEvent(topic);
if (!containsKey)
{
if (await _mqttPersisterConnection.TryRegisterMessageHandlerAsync(MessageReceivedAsync, cancellationToken))
{
_subsManager.TryAddSubscription(subscriptionInfo);
return(await OnSubscribesAsync(topic, cancellationToken));
}
}
return(null);
}
private void DoInternalSubscription(string eventName)
{
var containsKey = _subsManager.HasSubscriptionsForEvent(eventName);
if (!containsKey)
{
if (!_persistentConnection.IsConnected)
{
_persistentConnection.TryConnect();
}
using (var channel = _persistentConnection.CreateModel())
{
channel.QueueBind(queue: _queueName,
exchange: BROKER_NAME,
routingKey: eventName);
}
}
}
//Private methods
private void DoInternalSubscription(string eventName)
{
var containsKey = subscriptionManager.HasSubscriptionsForEvent(eventName);
if (!containsKey)
{
if (!connectionmanager.IsConnected)
{
connectionmanager.TryConnect();
}
using (var channel = connectionmanager.CreateModel())
{
channel.QueueBind(queue: settings.QueueName,
exchange: settings.BrokerName,
routingKey: eventName);
}
}
}
public static bool HasSubscriptionsForEvent <T>(this ISubscriptionsManager subscriptionsManager) where T : IntegrationEvent
{
var eventName = subscriptionsManager.GetEventKey <T>();
return(subscriptionsManager.HasSubscriptionsForEvent(eventName));
}