/// <summary>
/// The method that registers Event Hub listeners and assigns them to a recieve event. When I receive an event from the event hub listener, I trigger the callbackURL
/// </summary>
/// <param name="triggerId"></param>
/// <param name="triggerInput"></param>
/// <returns></returns>
public async Task RegisterTrigger(string triggerId, TriggerInput<EventHubInput, EventHubMessage> triggerInput)
{
var client = EventHubClient.CreateFromConnectionString(triggerInput.inputs.eventHubConnectionString, triggerInput.inputs.eventHubName);
EventHubConsumerGroup group = client.GetDefaultConsumerGroup(); //client.GetConsumerGroup(triggerInput.inputs.consumerGroup);
string[] partitions;
//If they specified partitions, iterate over their list to only listen to the partitions they specified
if (!String.IsNullOrEmpty(triggerInput.inputs.eventHubPartitionList))
{
partitions = triggerInput.inputs.eventHubPartitionList.Split(',');
}
//If they left it blank, create a list to listen to all partitions
else
{
partitions = new string[client.GetRuntimeInformation().PartitionCount];
for(int x = 0; x < partitions.Length; x++)
{
partitions[x] = x.ToString();
}
}
//For ever partition I should listen to, create a thread with a listener on it
foreach (var p in partitions)
{
p.Trim();
var reciever = group.CreateReceiver(client.GetRuntimeInformation().PartitionIds[int.Parse(p)], DateTime.UtcNow);
EventHubListener listener = new EventHubListener(reciever);
//Register the event. When I recieve a message, call the method to trigger the logic app
listener.MessageReceived += (sender, e) => sendTrigger(sender, e, Runtime.FromAppSettings(), triggerInput.GetCallback());
listener.StartListening();
}
//Register the triggerID in my store, so on subsequent checks from the logic app I don't spin up a new set of listeners
_store[triggerId] = true;
}
