private IAsyncCollector <Notification> BuildFromAttribute(NotificationHubAttribute attribute)
{
string resolvedConnectionString = ResolveConnectionString(ConnectionString, attribute.ConnectionString);
string resolvedHubName = ResolveHubName(HubName, attribute.HubName);
INotificationHubClientService service = new NotificationHubClientService(resolvedConnectionString, resolvedHubName);
return(new NotificationHubAsyncCollector(service, attribute.TagExpression));
}
public Task <IBinding> TryCreateAsync(BindingProviderContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
ParameterInfo parameter = context.Parameter;
NotificationHubAttribute attribute = parameter.GetCustomAttribute <NotificationHubAttribute>(inherit: false);
if (attribute == null)
{
return(Task.FromResult <IBinding>(null));
}
if (string.IsNullOrEmpty(_config.ConnectionString) &&
string.IsNullOrEmpty(attribute.ConnectionString))
{
throw new InvalidOperationException(
string.Format(CultureInfo.CurrentCulture,
"The Notification Hub connection string must be set either via a '{0}' app setting, via the NotificationHubAttribute.ConnectionString property or via NotificationHubsConfiguration.ConnectionString.",
NotificationHubsConfiguration.NotificationHubConnectionStringName));
}
if (string.IsNullOrEmpty(_config.HubName) &&
string.IsNullOrEmpty(attribute.HubName))
{
throw new InvalidOperationException(
string.Format(CultureInfo.CurrentCulture,
"The Notification Hub hub name must be set either via a '{0}' app setting, via the NotificationHubAttribute.HubName property or via NotificationHubsConfiguration.HubName.",
NotificationHubsConfiguration.NotificationHubSettingName));
}
string resolvedConnectionString = ResolveConnectionString(_config.ConnectionString, attribute.ConnectionString);
string resolvedHubName = ResolveHubName(_config.HubName, attribute.HubName);
INotificationHubClientService service = new NotificationHubClientService(resolvedConnectionString, resolvedHubName);
Func <string, INotificationHubClientService> invokeStringBinder = (invokeString) => service;
IBinding binding = BindingFactory.BindCollector(
parameter,
_converterManager,
(nhClientService, valueBindingContext) => new NotificationHubAsyncCollector(service, attribute.TagExpression),
"NotificationHubs",
invokeStringBinder);
return(Task.FromResult(binding));
}