/
main.go
68 lines (56 loc) · 1.74 KB
/
main.go
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package main
import (
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"gopkg.in/yaml.v2"
"code.cloudfoundry.org/test-log-emitter/client"
"code.cloudfoundry.org/test-log-emitter/config"
"code.cloudfoundry.org/test-log-emitter/emitters"
flag "github.com/spf13/pflag"
)
func main() {
var configFilePath *string = flag.String("config", "", "path to config file")
flag.Parse()
if *configFilePath == "" {
flag.Usage()
os.Exit(1)
}
confContents, err := ioutil.ReadFile(*configFilePath)
if err != nil {
log.Fatal(err)
}
conf := new(config.Config)
err = yaml.Unmarshal(confContents, conf)
if err != nil {
log.Fatal(err)
}
loggregatorClient, err := client.NewLoggregatorIngressClient(conf.Loggregator)
if err != nil {
log.Fatal(err)
}
gaugeEmitter := emitters.NewGaugeEmitter(loggregatorClient)
counterEmitter := emitters.NewCounterEmitter(loggregatorClient)
timerEmitter := emitters.NewTimerEmitter(loggregatorClient)
http.HandleFunc("/", ping)
http.Handle("/gauge", gaugeEmitter.EmitGauge())
http.Handle("/timer", timerEmitter.EmitTimer())
http.Handle("/counter", counterEmitter.EmitCounter())
fmt.Printf("Starting cpu usage logger on port %d...", conf.ListenPort)
if err := http.ListenAndServe(fmt.Sprintf(":%d", conf.ListenPort), nil); err != nil {
log.Fatal(err)
}
}
func ping(w http.ResponseWriter, r *http.Request) {
message := "What do you want to emit today?\n"
message = message + "* POST /gauge - posts a gauge metric\n"
message = message + "* POST /timer - posts a timer metric\n"
message = message + "* POST /counter - posts an counter metric\n"
if _, err := io.WriteString(w, message); err != nil {
http.Error(w, fmt.Sprintf("Failed to resond to ping request: %v", err), http.StatusInternalServerError)
return
}
}