public EventManagerMiddleware(
RequestDelegate next,
IOptions <EventManagerConfiguration> config
)
{
_next = next;
_config = config.Value;
EventManagerConstants.EventReceptionPath = !string.IsNullOrEmpty(_config.EventReceptionPath) ? _config.EventReceptionPath : EventManagerConstants.EventReceptionPath;
EventManagerConstants.ReplyEventPrefix = !string.IsNullOrEmpty(_config.ReplyEventPrefix) ? _config.ReplyEventPrefix : EventManagerConstants.ReplyEventPrefix;
EventDispatcher = EventDispatcher.Instance;
foreach (SubscriptionConfiguration subscriptionConf in _config.Subscriptions)
{
foreach (EventSubscriberConfiguration eventSubscriberConf in subscriptionConf.Subscribers)
{
ExternalServiceConfiguration externalService = _config.ExternalServices.Find(x => x.Name == eventSubscriberConf.Name);
if (externalService == null)
{
continue;
}
IAuthHandler auth = AuthFactory.Create(externalService.Auth);
if (!auth.Valid(externalService.Config, eventSubscriberConf))
{
throw new ArgumentException($"EventManagerMiddleware ERROR: externalService is not Valid for the externalService.Auth.Type `{externalService.Auth.Type}` and name `{externalService.Name}`, so it wont be registered with EventDispatcher.Register");
}
else
{
List <Func <Event, HttpResponseMessage> > callbacks = new List <Func <Event, HttpResponseMessage> >();
Subscriber subscriber = new Subscriber(eventSubscriberConf.Name)
{
Config = new SubscriberConfig
{
MaxTries = externalService.Config.MaxRetries,
RequestRate = externalService.Config.RequestRate
}
};
eventSubscriberConf.Endpoint = AuthFactory.Endpoint(eventSubscriberConf, externalService);
Subscription subscription = new Subscription()
{
Subscriber = subscriber,
EventName = subscriptionConf.EventName,
Method = new HttpMethod(eventSubscriberConf.Method),
EndPoint = eventSubscriberConf.Endpoint,
CallBacks = callbacks,
IsExternal = true,
Auth = auth,
Synchronous = eventSubscriberConf.Synchronous
};
EventDispatcher.Register(subscription);
}
}
}
}
public static void Init(EventManagerConfiguration config)
{
Debug.Assert(config.MaxEvents > 0u);
Logger.Trace <EventManager>($"Initialize {nameof(EventManager)} with max events {config.MaxEvents}");
_maxEvents = (int)config.MaxEvents;
_events = MemoryUtils.AllocateBlock <Event>(config.MaxEvents * 2);
}
