ServiceStack AppHost Configure for metrics.

gistfile1.cs

 public override void Configure(Funq.Container container)
 {
        const string statsdPrefix = "Qas.Web";
        //common config shared with tests
        Config.Configure();
        
        container.Register<IStatsd>(c => new Statsd(new StatsdUDP("localhost", 8125)));
        
        Plugins.Add(new MetricsFeature(container.Resolve<IStatsd>(), statsdPrefix));

        var statsd = container.Resolve<IStatsd>();
        statsd.Send<Statsd.Counting>(string.Format("{0}.{1}", statsdPrefix,"Started"), 1);

        ServiceExceptionHandler =
            (req, ex) =>
                {
                    statsd.Add<Statsd.Counting>(string.Format("{0}.{1}", statsdPrefix, "Error.Total"), 1);
                    statsd.Add<Statsd.Counting>(string.Format("{0}.{1}.{2}", statsdPrefix, "Error", ex.GetType()), 1);
                    statsd.Send();
                    return DtoUtils.HandleException(this, req, ex);
                };
        }