internal MessageFilteringContext(
IEnumerator <IMessageFilter> filtersEnumerator,
object state,
object message,
MessageHeaders headers,
MessageHandlingContext handlingContext,
Func <Task <MessageHandlingResult> > nativeHandler)
{
State = state;
Message = message;
Headers = headers;
HandlingContext = handlingContext;
_nativeHandler = nativeHandler;
_filtersEnumerator = filtersEnumerator;
}
public Task <MessageHandlingResult> InvokeHandlerAsync(
IServiceProvider parentServiceProvider,
object message,
MessageHeaders headers,
MessageHandlingContext handlingContext,
IMessagePublisher publisher)
{
if (parentServiceProvider == null)
{
throw new ArgumentNullException(nameof(parentServiceProvider));
}
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
if (publisher == null)
{
throw new ArgumentNullException(nameof(publisher));
}
if (message is TMessage typedMessage)
{
using (var scope = parentServiceProvider.CreateScope())
{
var handler = (IMessageHandler <TMessage>)scope.ServiceProvider.GetRequiredService(_options.HandlerType);
var context = new MessageFilteringContext
(
_globalFilters.GetEnumerator(),
null,
typedMessage,
headers,
handlingContext,
() => handler.HandleAsync(typedMessage, headers, publisher)
);
return(context.InvokeNextAsync());
}
}
throw new ArgumentException($"Object of type {typeof(TMessage)} is expected, but {message.GetType()} is passed", nameof(message));
}