Exemplo n.º 1
0
        public override object Evaluate(Environment environment, EvalContext context)
        {
            var from        = context.From;
            var until       = context.Until;
            var metricNames = environment.MetricRegistry.ResolveMetricNames(Expression.Selector);

            var metrics = MetricReader.ReadMetrics(environment, metricNames, from, until);

            return(metrics.ToArray());
        }
Exemplo n.º 2
0
        public object Invoke(Environment environment, EvalContext context, object[] parameters)
        {
            var p = new List <object> {
                context
            };

            var pis       = methodInfo.GetParameters();
            var paramsPi  = pis.SingleOrDefault(pi => pi.GetCustomAttributes(typeof(ParamArrayAttribute), false).OfType <ParamArrayAttribute>().SingleOrDefault() != null);
            var hasParams = paramsPi != null;
            var hasMetric = pis.All(pi => pi.ParameterType != typeof(MetricSelector));

            //
            // First parameter must always be an EvalContext instance
            if (hasParams)
            {
                p.AddRange(parameters.Take(pis.Length - 2));
                var @params = parameters.Skip(pis.Length - 2).ToArray();

                var par = Array.CreateInstance(paramsPi.ParameterType.GetElementType(), @params.Length);
                Array.Copy(@params, par, @params.Length);

                p.Add(par);
            } // if
            else
            {
                p.AddRange(parameters);
            }

            if (hasMetric)
            {
                var pos = p.FindIndex(_p => _p is MetricSelector);
                if (pos > -1)
                {
                    var ms = p[pos] as MetricSelector;

                    var metricNames = environment.MetricRegistry.ResolveMetricNames(ms.Selector);
                    var metrics     = MetricReader.ReadMetrics(environment, metricNames, context.From, context.Until);

                    p[pos] = metrics.ToArray();
                } // if
            }     // if

            return(methodInfo.Invoke(null, p.ToArray()));
        }