func roundFloat64(x exact.Value) exact.Value {
f, _ := exact.Float64Val(x)
if !math.IsInf(f, 0) {
return exact.MakeFloat64(f)
}
return nil
}
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
}
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")
}
}
//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
}
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
}