public IMessageResponse Execute()
{
if (Subject.Queue.Count == 0)
{
return(MessageResult.Empty);
}
var ctx = (MessageResult)Subject.Queue.Dequeue();
var handlers = Subject.Subscriber.Observers;
if (handlers.Count == 0)
{
OnCompleted(ctx);
}
else
{
var e = new MessageEventArgs(ctx);
ListnerManager.OnSending(e);
if (e.Context.Response.Canceled)
{
ListnerManager.OnSent(e);
OnCompleted(ctx);
return(ctx);
}
Dispatch(ctx);
}
return(ctx);
}
bool DoExecute(MessageResult ctx, IObserverHandler <IMessage> handler, AtomicInteger barrier)
{
var e = new MessageReceivingEventArgs(ctx, handler.Target);
try
{
ListnerManager.OnReceiving(e);
if (!e.Ignored)
{
ctx.results.Add(DelegateInvoker.Invoke <IMessage>(handler, ctx.Request.Sender, ctx.Request.ToMessage()));
}
return(true);
}
catch (Exception ex)
{
var re = new MessageExceptionEventArgs(ctx, ex);
ListnerManager.OnReceivingException(re);
ctx.InnerExceptions.Add(ex);
return(!re.Canceled);
}
finally
{
barrier--;
if (barrier == 0)
{
ListnerManager.OnReceived(new MessageEventArgs(ctx));
ListnerManager.OnSent(e);
OnCompleted(ctx);
}
else
{
ListnerManager.OnReceived(new MessageEventArgs(ctx));
}
e = null;
}
}