public async Task <ITriggerBinding> TryCreateAsync(TriggerBindingProviderContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
ParameterInfo parameter = context.Parameter;
var attribute = parameter.GetCustomAttribute <EdgeHubTriggerAttribute>(false);
if (attribute == null)
{
return(null);
}
await this.TrySetEventDefaultHandlerAsync().ConfigureAwait(false);
var messageProcessor = new EdgeHubMessageProcessor();
var triggerBinding = new EdgeHubTriggerBinding(context.Parameter, messageProcessor);
this.receivers.AddOrUpdate(
attribute.InputName.ToLowerInvariant(),
// The function used to generate a value for an absent.
// Creates a new List and adds the message processor
(k) => new List <EdgeHubMessageProcessor>()
{
messageProcessor
},
// The function used to generate a new value for an existing key.
// Adds the message processor to the key's existing list
(k, v) =>
{
v.Add(messageProcessor);
return(v);
});
return(triggerBinding);
}
public EdgeHubTriggerBinding(ParameterInfo parameter, EdgeHubMessageProcessor messageProcessor)
{
this.parameter = parameter;
this.messageProcessor = messageProcessor;
this.bindingContract = this.CreateBindingDataContract();
}
public Listener(ITriggeredFunctionExecutor executor, EdgeHubMessageProcessor messageProcessor)
{
this.executor = executor;
this.messageProcessor = messageProcessor;
}
