private async Task <bool> CallHandlers(IHandlerRegistry handlers, Type type, object message, Action <object> action)
{
var result = true;
var errorHandler = handlers.FindErrorHandler(type);
var typeHandlers = handlers.FindHandler(type);
if (typeHandlers != null)
{
foreach (var handler in typeHandlers)
{
var hresult = true;
var errorMessage = "No error.";
try
{
await handler(message, action);
}
catch (Exception ex)
{
errorMessage = string.Format("Message handler failed: {0}", ex.Message);
_logger.Error("Message handler exception:", ex);
hresult = false;
}
if (!hresult && errorHandler != null)
{
try
{
await errorHandler(errorMessage, action);
}
catch (Exception ex)
{
_logger.Error("Error handler exception:", ex);
}
}
result = result && hresult;
}
}
else
{
_logger.Error("Handler for type '{0}' not found. Dropping message.", type.Name);
result = false;
}
return(result);
}
public static IEnumerable <Func <object, Action <object>, Task> > FindHandler <T>(this IHandlerRegistry registry)
{
return(registry.FindHandler(typeof(T)));
}