private static async void OnSubscriptionNotify(string server, ServiceEventMessage message)
{
#if DEBUG
Console.WriteLine("Consumed OnSubscriptionNotify message");
Console.WriteLine("Server: " + server);
Console.WriteLine("Message: " + message.ToString());
#endif
string url = (string)message.Parameters["Url"];
string clientID = (string)message.Parameters["ClientID"];
Model.WebhookNotification notification = new Model.WebhookNotification();
MemoryStream stream = new MemoryStream(16384);
new ServiceModels.WebhookNotification(notification, message).Serialise(stream);
string payload = new StreamReader(stream).ReadToEnd();
bool retry = message.Parameters.ContainsKey("RequeueCount");
long requeueCount = retry ? (long)message.Parameters["RequeueCount"] : 0;
bool dropMessage = false;
#if DEBUG
Console.WriteLine($"Sending payload to {url}: \n" + payload);
#endif
try
{
RESTClient.RESTResponse response = await RESTClient.PostAsync(url, ACCEPT_TYPE, null, notification.AcceptContentType, payload);
switch ((HttpStatusCode)response.StatusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
ApplicationEventLog.Write(LogLevel.Information, $"Webhook post notification from client {clientID} to {url} successful.");
break;
case HttpStatusCode.BadRequest:
case HttpStatusCode.Unauthorized:
case HttpStatusCode.NotFound:
case HttpStatusCode.MethodNotAllowed:
// No retry for these failures
ApplicationEventLog.Write(LogLevel.Warning, $"Non-recoverable HTTP Status code from{url}:{response.StatusCode}, discarding message.");
dropMessage = true;
break;
default:
ApplicationEventLog.Write(LogLevel.Warning, $"Unexpected HTTP Status code from{url}:{response.StatusCode}");
break;
}
}
catch(Exception ex)
{
ApplicationEventLog.Write(LogLevel.Error, "Failed to post webhook", ex);
}
if ((MAX_POST_ATTEMPTS <= 0 || requeueCount < MAX_POST_ATTEMPTS) && !dropMessage)
{
BusinessLogicFactory.ServiceMessages.NackMessage(message);
}
}
private static void OnUpdateSubscription(string server, ServiceEventMessage message)
{
#if DEBUG
Console.WriteLine("Consumed update subscription message");
Console.WriteLine("Server: " + server);
Console.WriteLine("Message: " + message.ToString());
#endif
Subscription subscription = GetSubscriptionFromMessage(message);
if (subscription != null)
{
if (subscription.SubscriptionType == TSubscriptionType.Observation)
{
if (subscription.NotificationParameters != null && subscription.PropertyDefinitionID != Guid.Empty)
{
Client client = DataAccessFactory.Clients.GetClient(subscription.ClientID);
if (client != null)
{
if (DataAccessFactory.Servers.SetNotificationParameters(client, subscription.ObjectDefinitionID, subscription.ObjectID, subscription.PropertyDefinitionID, subscription.NotificationParameters))
ApplicationEventLog.Write(LogLevel.Information, $"Updated notification parameters for resource /{subscription.ObjectDefinitionID}/{subscription.ObjectID}/{subscription.PropertyDefinitionID}");
else
ApplicationEventLog.Write(LogLevel.Warning, $"Failed to update notification parameters for resource /{subscription.ObjectDefinitionID}/{subscription.ObjectID}/{subscription.PropertyDefinitionID}");
}
else
{
ApplicationEventLog.Write(LogLevel.Warning, $"No client exists for {subscription.ClientID} in subscription {subscription.SubscriptionID}");
}
}
}
DataAccessFactory.Subscriptions.SaveSubscription(subscription, TObjectState.Update);
}
else
{
ApplicationEventLog.Write(LogLevel.Warning, $"Failed to lookup subscription: {message.Parameters["SubscriptionID"]}");
}
}
private static void OnObservationNotify(string server, ServiceEventMessage message)
{
#if DEBUG
Console.WriteLine("Consumed OnObservationNotify message");
Console.WriteLine("Server: " + server);
Console.WriteLine("Message: " + message.ToString());
#endif
NotifySubscribers(message, TSubscriptionType.Observation);
}
private static void OnDeleteSubscription(string server, ServiceEventMessage message)
{
#if DEBUG
Console.WriteLine("Consumed delete subscription message");
Console.WriteLine("Server: " + server);
Console.WriteLine("Message: " + message.ToString());
#endif
Subscription subscription = GetSubscriptionFromMessage(message);
if (subscription != null)
{
if (subscription.SubscriptionType == TSubscriptionType.Observation)
{
CancelObservation(subscription);
}
DataAccessFactory.Subscriptions.SaveSubscription(subscription, TObjectState.Delete);
}
else
{
ApplicationEventLog.Write(LogLevel.Warning, $"Failed to lookup subscription: {message.Parameters["SubscriptionID"]}");
}
}
private static void OnCreateSubscription(string server, ServiceEventMessage message)
{
#if DEBUG
Console.WriteLine("Consumed create subscription message");
Console.WriteLine("Server: " + server);
Console.WriteLine("Message: " + message.ToString());
#endif
Subscription subscription = GetSubscriptionFromMessage(message);
if (subscription != null)
{
if (subscription.SubscriptionType == TSubscriptionType.Observation)
{
Observe(subscription);
}
else
{
// for server event types, we are already subscribed to RabbitMQ service messages.
}
}
else
{
ApplicationEventLog.Write(LogLevel.Warning, $"Failed to lookup subscription: {message.Parameters["SubscriptionID"]}");
}
}
private static void OnClientDisconnected(string server, ServiceEventMessage message)
{
#if DEBUG
Console.WriteLine("Consumed OnClientDisconnected message");
Console.WriteLine("Server: " + server);
Console.WriteLine("Message: " + message.ToString());
#endif
NotifySubscribers(message, TSubscriptionType.ClientDisconnected);
}