public NotificationSubscriber(RedisSubscriber redisSubscriber, string connectionId, string userId)
{
_redisSubscriber = redisSubscriber;
ConnectionId = connectionId;
UserId = userId;
}
public void Subscribe(string connectionId, string userId)
{
string channelName = this._keyBuilder.BuildChannelName(userId);
string subscriberKey = this._keyBuilder.BuildSubscriberKey(connectionId, userId);
RedisSubscriber redisSub = _redisManager.GetSubscriber(channelName);
NotificationSubscriber hubSub = new NotificationSubscriber(redisSub, connectionId, userId);
if (HubSubscribers.TryAdd(subscriberKey, hubSub))
{
hubSub.OnMessage(async message =>
{
// check exchange message integrity
if (message.Properties?.ContainsKey("RouteName") != true)
{
throw new Exception("The exchange message does not contain a route name property");
}
string routeName = message.Properties["RouteName"];
// check registered routes
NotificationRouteDescriptor route = this._routes.GetRoute(routeName);
if (route is null)
{
throw new Exception($"Could not find route with name {route.RouteName}. Each message must contain a route name that will redirect the message handling to the proper controller");
}
MethodInfo methodInfo = this._controllerRegistry.GetMethodInfoForRoute(route.RouteName);
if (methodInfo is null)
{
throw new Exception("Could not found a controller that contains a method decorated with " +
$"{nameof(NotificationRouteAttribute)} to handle the received message");
}
// create controller
object controllerObject = ActivatorUtilities.CreateInstance(this._serviceProvider, methodInfo.ReflectedType);
FieldInfo subscriberInfo = FindField(methodInfo.ReflectedType, "_subscriber");
if (subscriberInfo is null)
{
throw new ApplicationException("Could not find _subscriber field in the redis controller base class");
}
// initialize controller properties
subscriberInfo.SetValue(controllerObject, hubSub);
// deserialize exchange model inner model
object model = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(message.Body), route.ModelType);
// invoke controller method
object result = methodInfo.Invoke(controllerObject, new object[] { model });
if (typeof(Task).IsAssignableFrom(result.GetType()))
{
Task taskResult = result as Task;
await taskResult;
}
});
//this.OnNewSubscriber(hubSub);
}
}
