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gometrics.go
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gometrics.go
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package metrics
import (
"errors"
"fmt"
"log"
"net"
"os"
"sort"
"time"
graphite "github.com/cyberdelia/go-metrics-graphite"
statsd "github.com/magiconair/go-metrics-statsd"
gm "github.com/rcrowley/go-metrics"
)
// gmStdoutRegistry returns a go-metrics registry that reports to stdout.
func gmStdoutRegistry(interval time.Duration) (Registry, error) {
logger := log.New(os.Stderr, "localhost: ", log.Lmicroseconds)
r := gm.NewRegistry()
go gm.Log(r, interval, logger)
return &gmRegistry{r}, nil
}
// gmGraphiteRegistry returns a go-metrics registry that reports to a Graphite server.
func gmGraphiteRegistry(prefix, addr string, interval time.Duration) (Registry, error) {
if addr == "" {
return nil, errors.New(" graphite addr missing")
}
a, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
return nil, fmt.Errorf(" cannot connect to Graphite: %s", err)
}
r := gm.NewRegistry()
go graphite.Graphite(r, interval, prefix, a)
return &gmRegistry{r}, nil
}
// gmStatsDRegistry returns a go-metrics registry that reports to a StatsD server.
func gmStatsDRegistry(prefix, addr string, interval time.Duration) (Registry, error) {
if addr == "" {
return nil, errors.New(" statsd addr missing")
}
a, err := net.ResolveUDPAddr("udp", addr)
if err != nil {
return nil, fmt.Errorf(" cannot connect to StatsD: %s", err)
}
r := gm.NewRegistry()
go statsd.StatsD(r, interval, prefix, a)
return &gmRegistry{r}, nil
}
// gmRegistry implements the Registry interface
// using the github.com/rcrowley/go-metrics library.
type gmRegistry struct {
r gm.Registry
}
func (p *gmRegistry) Names() (names []string) {
p.r.Each(func(name string, _ interface{}) {
names = append(names, name)
})
sort.Strings(names)
return names
}
func (p *gmRegistry) Unregister(name string) {
p.r.Unregister(name)
}
func (p *gmRegistry) UnregisterAll() {
p.r.UnregisterAll()
}
func (p *gmRegistry) GetCounter(name string) Counter {
return gm.GetOrRegisterCounter(name, p.r)
}
func (p *gmRegistry) GetTimer(name string) Timer {
return gm.GetOrRegisterTimer(name, p.r)
}