func statsPageHandler(w http.ResponseWriter, r *http.Request, bctx *BasePageContext) {
ctx := &struct {
*BasePageContext
Stats []*stat
}{
BasePageContext: bctx,
Stats: []*stat{},
}
var stats *expvar.Map
stats = expvar.Get("counters").(*expvar.Map)
servStat := expvar.Get("states").(*expvar.Map)
errors := expvar.Get("errors").(*expvar.Map)
for _, ep := range bctx.Globals.GetEndpoints() {
epname := ep.Name
all := stats.Get(epname)
success := stats.Get(epname + "|pass")
unauth := stats.Get(epname + "|401")
fail := stats.Get(epname + "|403")
status := servStat.Get(epname)
statusSSL := servStat.Get(epname + "|ssl")
err := errors.Get(epname)
errSSL := errors.Get(epname + "|ssl")
ctx.Stats = append(ctx.Stats, &stat{epname, fail, success, unauth, all, status, statusSSL,
err, errSSL})
}
RenderTemplateStd(w, ctx, "stats.tmpl")
}
func GetStatus(w rest.ResponseWriter, r *rest.Request) {
// b := GetBase(r)
status := make(map[string]string)
status["status"] = "ok"
status["attemptsError"] = expvar.Get("attemptsError").String()
status["attemptsSuccess"] = expvar.Get("attemptsSuccess").String()
w.WriteJson(status)
}
func TestNew(t *testing.T) {
// Publishes prefix in expvar, panics the second time
assert.Nil(t, expvar.Get("name"))
New("name")
assert.NotNil(t, expvar.Get("name"))
assert.IsType(t, expvar.Get("name"), &expvar.Map{})
assert.Panics(t, func() {
New("name")
})
}
func TestPublished(t *testing.T) {
l, err := Listen("")
if err != nil {
t.Fatal(err)
}
opened := make(chan struct{})
closed := make(chan struct{})
go func() {
for {
conn, err := l.Accept()
opened <- struct{}{}
if err != nil {
t.Fatal(err)
}
go func() {
b := make([]byte, 100)
for {
_, err := conn.Read(b)
if err != nil {
conn.Close()
closed <- struct{}{}
return
}
}
}()
}
}()
addr := l.Addr().String()
for i := 1; i <= 3; i++ {
conn1, err := net.Dial("tcp", addr)
if err != nil {
t.Fatal(err)
}
<-opened
if v := expvar.Get("ConnCount").String(); v != "1" {
t.Errorf("ConnCount: %v, want 1", v)
}
conn1.Close()
<-closed
if v := expvar.Get("ConnCount").String(); v != "0" {
t.Errorf("ConnCount: %v, want 1", v)
}
if v := expvar.Get("ConnAccepted").String(); v != fmt.Sprintf("%d", i) {
t.Errorf("ConnAccepted: %v, want %d", v, i)
}
}
}
func wsServer(ws *websocket.Conn) {
var buf string
defer func() {
if err := ws.Close(); err != nil {
log.Println("Websocket could not be closed", err.Error())
} else {
log.Println("Websocket closed")
}
}()
//q := ws.Request().URL.Query()
//name := q.Get("name")
stopped := false
ticker := time.Tick(time.Duration(1) * time.Second)
for !stopped {
select {
case <-ticker:
val := expvar.Get(metricsVar)
if val == nil {
buf = ""
} else {
buf = val.String()
}
_, err := ws.Write([]byte(buf))
if err != nil {
log.Printf("Websocket error: %s\n", err.Error())
stopped = true
}
}
}
}
func TestDerive(t *testing.T) {
d := NewDerive(api.Identifier{
Host: "example.com",
Plugin: "golang",
Type: "derive",
})
for i := 0; i < 10; i++ {
d.Add(i)
}
want := api.ValueList{
Identifier: api.Identifier{
Host: "example.com",
Plugin: "golang",
Type: "derive",
},
Values: []api.Value{api.Derive(45)},
}
got := d.ValueList()
if !reflect.DeepEqual(got, want) {
t.Errorf("got %#v, want %#v", got, want)
}
s := expvar.Get("example.com/golang/derive").String()
if s != "45" {
t.Errorf("got %q, want %q", s, "45")
}
}
func init() {
registry := expvar.Get("registry")
if registry == nil {
registry = expvar.NewMap("registry")
}
cache := registry.(*expvar.Map).Get("cache")
if cache == nil {
cache = &expvar.Map{}
cache.(*expvar.Map).Init()
registry.(*expvar.Map).Set("cache", cache)
}
storage := cache.(*expvar.Map).Get("storage")
if storage == nil {
storage = &expvar.Map{}
storage.(*expvar.Map).Init()
cache.(*expvar.Map).Set("storage", storage)
}
storage.(*expvar.Map).Set("blobdescriptor", expvar.Func(func() interface{} {
// no need for synchronous access: the increments are atomic and
// during reading, we don't care if the data is up to date. The
// numbers will always *eventually* be reported correctly.
return blobStatterCacheMetrics
}))
}
// Gets an exported var and returns its unquoted string contents
func GetStringVar(name string) string {
s, err := strconv.Unquote(expvar.Get(name).String())
if err != nil {
panic(err)
}
return s
}
// NewStatistics returns an expvar-based map with the given key. Within that map
// is another map. Within there "name" is the Measurement name, "tags" are the tags,
// and values are placed at the key "values".
func NewStatistics(key, name string, tags map[string]string) *expvar.Map {
expvarMu.Lock()
defer expvarMu.Unlock()
// Add expvar for this service.
var v expvar.Var
if v = expvar.Get(key); v == nil {
v = expvar.NewMap(key)
}
m := v.(*expvar.Map)
// Set the name
nameVar := &expvar.String{}
nameVar.Set(name)
m.Set("name", nameVar)
// Set the tags
tagsVar := &expvar.Map{}
tagsVar.Init()
for k, v := range tags {
value := &expvar.String{}
value.Set(v)
tagsVar.Set(k, value)
}
m.Set("tags", tagsVar)
// Create and set the values entry used for actual stats.
statMap := &expvar.Map{}
statMap.Init()
m.Set("values", statMap)
return statMap
}
// Gets an exported var and returns its float value
func GetFloatVar(name string) float64 {
f, err := strconv.ParseFloat(expvar.Get(name).String(), 64)
if err != nil {
panic(err)
}
return f
}
// Gets an exported var and returns its int value
func GetIntVar(name string) int64 {
i, err := strconv.ParseInt(expvar.Get(name).String(), 10, 64)
if err != nil {
panic(err)
}
return i
}
func TestGauge(t *testing.T) {
g := NewGauge(api.Identifier{
Host: "example.com",
Plugin: "golang",
Type: "gauge",
})
g.Set(42.0)
want := api.ValueList{
Identifier: api.Identifier{
Host: "example.com",
Plugin: "golang",
Type: "gauge",
},
Values: []api.Value{api.Gauge(42)},
}
got := g.ValueList()
if !reflect.DeepEqual(got, want) {
t.Errorf("got %#v, want %#v", got, want)
}
s := expvar.Get("example.com/golang/gauge").String()
if s != "42" {
t.Errorf("got %q, want %q", s, "42")
}
}
func TestGauge(t *testing.T) {
s := New("gauge")
v := expvar.Get("gauge").(*expvar.Map)
s.Gauge("test", 1)
assert.Equal(t, "1", v.Get("test").String())
s.Gauge("test", -1)
assert.Equal(t, "-1", v.Get("test").String())
}
func TestCount(t *testing.T) {
s := New("count")
v := expvar.Get("count").(*expvar.Map)
s.Count("test", 1)
assert.Equal(t, "1", v.Get("test").String())
s.Count("test", -1)
assert.Equal(t, "0", v.Get("test").String())
}
func TestCallbackGauge(t *testing.T) {
value := 42.43
metricName := "foo"
expvar.PublishCallbackGauge(metricName, func() float64 { return value })
if want, have := fmt.Sprint(value), stdexpvar.Get(metricName).String(); want != have {
t.Errorf("want %q, have %q", want, have)
}
}
func checkMemcacheExpvar(t *testing.T, name string, expectedVal string) {
val := expvar.Get(name)
if val == nil {
t.Fatalf("cannot find exported variable: %s", name)
}
if val.String() != expectedVal {
t.Fatalf("name: %s, expect to get %s, but got: %s", name, expectedVal, val.String())
}
}
func TestWatcherErrors(t *testing.T) {
orig, err := strconv.ParseInt(expvar.Get("log_watcher_error_count").String(), 10, 64)
if err != nil {
t.Fatalf("couldn't convert expvar %q", expvar.Get("log_watcher_error_count").String())
}
w, err := NewLogWatcher()
if err != nil {
t.Fatalf("couldn't create a watcher")
}
w.Errors <- errors.New("just a test, not really an error")
if err := w.Close(); err != nil {
t.Fatalf("watcher close failed: %q", err)
}
diff := pretty.Compare(strconv.FormatInt(orig+1, 10), expvar.Get("log_watcher_error_count").String())
if len(diff) > 0 {
t.Errorf("log watcher error count doens't match:\n%s", diff)
}
}
func TestCounter(t *testing.T) {
var (
name = "m"
value = 123
)
expvar.NewCounter(name).With(metrics.Field{Key: "ignored", Value: "field"}).Add(uint64(value))
if want, have := fmt.Sprint(value), stdexpvar.Get(name).String(); want != have {
t.Errorf("want %q, have %q", want, have)
}
}
func GetStatement(key string) (stmt mysql.Stmt, err error) {
stmt, ok := Statements[key]
if !ok {
qry := expvar.Get(key)
if qry == nil {
err = errors.New("Invalid query reference")
}
}
return
}
func TestWatcherErrors(t *testing.T) {
w, err := NewLogWatcher()
if err != nil {
t.Fatalf("couldn't create a watcher")
}
w.Errors <- errors.New("test error")
w.Close()
diff := pretty.Compare(expvar.Get("log_watcher_error_count").String(), "1")
if len(diff) > 0 {
t.Errorf("log watcher error count doens't match:\n%s", diff)
}
}
func TestGauge(t *testing.T) {
var (
name = "xyz"
value = 54321
delta = 12345
g = expvar.NewGauge(name).With(metrics.Field{Key: "ignored", Value: "field"})
)
g.Set(float64(value))
g.Add(float64(delta))
if want, have := fmt.Sprint(value+delta), stdexpvar.Get(name).String(); want != have {
t.Errorf("want %q, have %q", want, have)
}
}
func TestMultiGauge(t *testing.T) {
g := metrics.NewMultiGauge(
"multidelta",
expvar.NewGauge("delta"),
prometheus.NewGauge(stdprometheus.GaugeOpts{
Namespace: "test",
Subsystem: "multi_gauge",
Name: "kappa",
Help: "Kappa gauge.",
}, []string{"a"}),
)
f := metrics.Field{Key: "a", Value: "aaa"}
g.With(f).Set(34)
if want, have := "34", stdexpvar.Get("delta").String(); want != have {
t.Errorf("expvar: want %q, have %q", want, have)
}
if want, have := strings.Join([]string{
`# HELP test_multi_gauge_kappa Kappa gauge.`,
`# TYPE test_multi_gauge_kappa gauge`,
`test_multi_gauge_kappa{a="aaa"} 34`,
}, "\n"), scrapePrometheus(t); !strings.Contains(have, want) {
t.Errorf("Prometheus metric stanza not found or incorrect\n%s", have)
}
g.With(f).Add(-40)
if want, have := "-6", stdexpvar.Get("delta").String(); want != have {
t.Errorf("expvar: want %q, have %q", want, have)
}
if want, have := strings.Join([]string{
`# HELP test_multi_gauge_kappa Kappa gauge.`,
`# TYPE test_multi_gauge_kappa gauge`,
`test_multi_gauge_kappa{a="aaa"} -6`,
}, "\n"), scrapePrometheus(t); !strings.Contains(have, want) {
t.Errorf("Prometheus metric stanza not found or incorrect\n%s", have)
}
}
// setExpvar configures the expvar based collection for this service. It must be done within a
// lock so previous registrations for this key can be checked. Re-registering a key will result
// in a panic.
func (s *Service) setExpvar() {
expvarMu.Lock()
defer expvarMu.Unlock()
key := strings.Join([]string{"graphite", s.protocol, s.bindAddress}, ":")
// Add expvar for this service.
var m expvar.Var
if m = expvar.Get(key); m == nil {
m = expvar.NewMap(key)
}
s.statMap = m.(*expvar.Map)
}
func (exp *exp) getFloat(name string) *expvar.Float {
var v *expvar.Float
exp.expvarLock.Lock()
p := expvar.Get(name)
if p != nil {
v = p.(*expvar.Float)
} else {
v = new(expvar.Float)
expvar.Publish(name, v)
}
exp.expvarLock.Unlock()
return v
}
func (mh *metricsHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "must-revalidate,no-cache,no-store")
// _, _ = metrics.Snapshot()
val := expvar.Get(metricsVar)
if val == nil {
w.WriteHeader(http.StatusNotImplemented)
w.Write([]byte("No metrics."))
return
}
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(val.String()))
}
func GetStatement(key string) (stmt *autorc.Stmt, err error) {
stmt, ok := Statements[key]
if !ok {
qry := expvar.Get(key)
if qry == nil {
err = errors.New("Invalid query reference")
} else {
stmt, err = Db.Prepare(qry.String())
}
}
return
}
func assertExpvarNormalHistogram(t *testing.T, metricName string, mean, stdev int64, quantiles []int) {
const tolerance int = 2
for _, quantile := range quantiles {
want := normalValueAtQuantile(mean, stdev, quantile)
s := stdexpvar.Get(fmt.Sprintf("%s_p%02d", metricName, quantile)).String()
have, err := strconv.Atoi(s)
if err != nil {
t.Fatal(err)
}
if int(math.Abs(float64(want)-float64(have))) > tolerance {
t.Errorf("quantile %d: want %d, have %d", quantile, want, have)
}
}
}
func TestGets(t *testing.T) {
var p pool.Pool
p = pool.RoundRobin([]string{"≠"})
p = pool.Instrument(p)
p = pool.Report(ioutil.Discard, p)
n := 123
for i := 0; i < n; i++ {
p.Get()
}
want := strconv.FormatInt(int64(n), 10)
have := expvar.Get(pool.ExpvarKeyGets).String()
if want != have {
t.Errorf("want %q, have %q", want, have)
}
}
// Collect implements Collector.
func (e *ExpvarCollector) Collect(ch chan<- Metric) {
for name, desc := range e.exports {
var m Metric
expVar := expvar.Get(name)
if expVar == nil {
continue
}
var v interface{}
labels := make([]string, len(desc.variableLabels))
if err := json.Unmarshal([]byte(expVar.String()), &v); err != nil {
ch <- NewInvalidMetric(desc, err)
continue
}
var processValue func(v interface{}, i int)
processValue = func(v interface{}, i int) {
if i >= len(labels) {
copiedLabels := append(make([]string, 0, len(labels)), labels...)
switch v := v.(type) {
case float64:
m = MustNewConstMetric(desc, UntypedValue, v, copiedLabels...)
case bool:
if v {
m = MustNewConstMetric(desc, UntypedValue, 1, copiedLabels...)
} else {
m = MustNewConstMetric(desc, UntypedValue, 0, copiedLabels...)
}
default:
return
}
ch <- m
return
}
vm, ok := v.(map[string]interface{})
if !ok {
return
}
for lv, val := range vm {
labels[i] = lv
processValue(val, i+1)
}
}
processValue(v, 0)
}
}
func (ab *AmqpBeat) exposeMetrics() {
go func() {
http.ListenAndServe(*ab.RbConfig.AmqpInput.StatsAddress, nil)
}()
go func(metrics chan *metric) {
mmap := make(map[string]*expvar.Int)
for m := range metrics {
if _, ok := mmap[m.name]; !ok {
v := expvar.Get(m.name)
if v == nil {
v = expvar.NewInt(m.name)
}
mmap[m.name] = v.(*expvar.Int)
}
mmap[m.name].Set(m.value)
}
}(ab.metrics)
}
