func ExampleNewHandler() {
c := xhandler.Chain{}
// Install the metric handler with dogstatsd backend client and some env tags
flushInterval := 5 * time.Second
tags := []string{"role:my-service"}
statsdWriter, err := net.Dial("udp", "127.0.0.1:8126")
if err != nil {
log.Fatal(err)
}
c.Use(xstats.NewHandler(dogstatsd.New(statsdWriter, flushInterval), tags))
// Here is your handler
h := c.HandlerH(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Get the xstats request's instance from the context. You can safely assume it will
// be always there, if the handler is removed, xstats.FromContext will return a nop
// instance.
m := xstats.FromRequest(r)
// Count something
m.Count("requests", 1, "route:index")
}))
http.Handle("/", h)
if err := http.ListenAndServe(":8080", nil); err != nil {
log.Fatal(err)
}
}
func ExampleMultiSender() {
// Create an expvar sender
s1 := expvar.New("stats")
// Create the stats sender
statsdWriter, _ := net.Dial("udp", "127.0.0.1:8126")
s2 := dogstatsd.New(statsdWriter, 5*time.Second)
// Create a xstats with a sender composed of the previous two.
// You may also create a NewHandler() the same way.
s := xstats.New(xstats.MultiSender{s1, s2})
// Send some observations
s.Count("requests", 1, "tag")
s.Timing("something", 5*time.Millisecond, "tag")
}
func ExampleNew() {
// Defines interval between flushes to statsd server
flushInterval := 5 * time.Second
// Connection to the statsd server
statsdWriter, err := net.Dial("udp", "127.0.0.1:8126")
if err != nil {
log.Fatal(err)
}
// Create the stats client
s := xstats.New(dogstatsd.New(statsdWriter, flushInterval))
// Global tags sent with all metrics (only with supported clients like datadog's)
s.AddTags("role:my-service", "dc:sv6")
// Send some observations
s.Count("requests", 1, "tag")
s.Timing("something", 5*time.Millisecond, "tag")
}