/// <summary>
/// This event will replace the default OnDisconnected functionality of the base class. It removes ServiceBus subscriptions and it will also
/// remove <see cref="WorkflowBusSubscriber"/> from the relay. If this is not removed and the client has an id in storage, it will try to resume and
/// wait for a complete message (Which will never arrive). Cleanup is therefore mandatory
/// </summary>
/// <param name="obj"></param>
private void BusSubscriber_InstanceDone(WorkflowBusSubscriberDoneArgs obj)
{
//a status done or error was created.
lock (WorkflowHubLock.GetLock(obj.Instance.CorrelationId))
{
//first make sure subscriptions are removed. The callback are attached to the hub subscriber object
RemoveSubscriptionsForAsync(obj.Instance.CorrelationId).Wait();
//wremvoe the subscriber will clean the hub subscriber and other dependencies
WorkflowRelay.RemoveBusSubscriber(obj.Instance);
}
}
/// <summary>
/// The default functionality will remove service bus subscribers. In our case we need thos esubscribers to still work
/// </summary>
/// <param name="stopCalled"></param>
/// <returns></returns>
public override Task OnDisconnected(bool stopCalled)
{
//prevent hub subscribers to send messages, the client is already disconnected
lock (WorkflowHubLock.GetLock(Context.QueryString["correlationId"]))
{
string correlationId = Context.QueryString["correlationId"];
//we remove all connections from the workflowhub to the browser
WorkflowRelay.RemoveHubSubscribers(correlationId);
//remove the signalR connection Id from the list of connections
base.RemoveConnection();
Logger.WriteWarning(new LogMessage("Client disconnected. Workflow service bus listeners remain active. SignalR subscribers are removed."), LogCategories);
return(Task.CompletedTask);
}
}