Example #1
0
func roundFloat64(x exact.Value) exact.Value {
	f, _ := exact.Float64Val(x)
	if !math.IsInf(f, 0) {
		return exact.MakeFloat64(f)
	}
	return nil
}
Example #2
0
func roundFloat32(x exact.Value) exact.Value {
	f32, _ := exact.Float32Val(x)
	f := float64(f32)
	if !math.IsInf(f, 0) {
		return exact.MakeFloat64(f)
	}
	return nil
}
Example #3
0
func TestNewScopeAndPackage2(t *testing.T) {
	c := initTestChecker()
	c.NewScopeAndPackage()
	c.sc.Insert(types.NewConst(0, c.pkg, "testfloat1",
		types.New("float64"), exact.MakeFloat64(1)))
	c.NewScopeAndPackage()
	for _, name := range c.sc.Names() {
		if name == "testfloat1" {
			t.Errorf("scope not reset")
		}
	}
	o := c.sc.Insert(types.NewConst(0, c.pkg, "testfloat1",
		types.New("float64"), exact.MakeFloat64(2)))
	if o != nil {
		t.Errorf("did not reset scope")
	}
}
Example #4
0
//insertMetricValues inserts the values and rates of the metrics collected
// as constants into the scope used to evaluate the expressions
func (c *checker) InsertMetricValuesFromJSON() error {
	//get metrics from json package
	//TODO: get directly from metric context if available
	resp, err := http.Get("http://" + c.hostport + "/api/v1/metrics.json/")
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	d := json.NewDecoder(resp.Body)
	var metrics []metrics.MetricJSON
	err = d.Decode(&metrics)
	if err != nil {
		return err
	}

	//insert metric value into scope
	for _, m := range metrics {
		switch val := m.Value.(type) {
		case float64:
			name := strings.Replace(m.Name, ".", "_", -1) + "_value"
			c.sc.Insert(types.NewConst(0, c.pkg, name,
				types.New("float64"), exact.MakeFloat64(val)))
		case map[string]interface{}:
			//TODO: make sure we don't panic in case something is not formatted
			// like expected
			if current, ok := val["current"]; ok {
				name := strings.Replace(m.Name, ".", "_", -1) + "_current"
				c.sc.Insert(types.NewConst(0, c.pkg, name,
					types.New("float64"), exact.MakeFloat64(current.(float64))))
			}
			if rate, ok := val["rate"]; ok {
				name := strings.Replace(m.Name, ".", "_", -1) + "_rate"
				c.sc.Insert(types.NewConst(0, c.pkg, name,
					types.New("float64"), exact.MakeFloat64(rate.(float64))))
			}
		default:
			//a value type came up that wasn't anticipated
			fmt.Fprintln(os.Stderr, reflect.TypeOf(val))
		}
	}
	return nil
}
Example #5
0
func (c *checker) InsertMetricValuesFromContext(m *metrics.MetricContext) error {
	for metricName, metric := range m.Gauges {
		name := strings.Replace(metricName, ".", "_", -1) + "_value"
		c.sc.Insert(types.NewConst(0, c.pkg, name,
			types.New("float64"), exact.MakeFloat64(metric.Get())))
		sname := name + "_string"
		c.sc.Insert(types.NewConst(0, c.pkg, sname,
			types.New("string"), exact.MakeString(fmt.Sprintf("%0.2f", metric.Get()))))
	}
	for metricName, metric := range m.Counters {
		name := strings.Replace(metricName, ".", "_", -1) + "_current"
		c.sc.Insert(types.NewConst(0, c.pkg, name,
			types.New("float64"), exact.MakeUint64(metric.Get())))
		sname := name + "_string"
		c.sc.Insert(types.NewConst(0, c.pkg, sname,
			types.New("string"), exact.MakeString(fmt.Sprintf("%d", metric.Get()))))
		name = strings.Replace(metricName, ".", "_", -1) + "_rate"
		c.sc.Insert(types.NewConst(0, c.pkg, name,
			types.New("float64"), exact.MakeFloat64(metric.ComputeRate())))
	}
	return nil
}