/
main.go
76 lines (61 loc) · 1.9 KB
/
main.go
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package main
import (
"context"
"fmt"
"github.com/go-kit/kit/log"
kitprometheus "github.com/go-kit/kit/metrics/prometheus"
stdprometheus "github.com/prometheus/client_golang/prometheus"
"golang.org/x/time/rate"
"net/http"
"os"
"os/signal"
"syscall"
"time"
)
func main() {
ctx := context.Background()
errChan := make(chan error)
var logger log.Logger
{
logger = log.NewLogfmtLogger(os.Stderr)
logger = log.With(logger, "ts", log.DefaultTimestampUTC)
logger = log.With(logger, "caller", log.DefaultCaller)
}
fieldKeys := []string{"method"}
requestCount := kitprometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: "raysonxin",
Subsystem: "arithmetic_service",
Name: "request_count",
Help: "Number of requests received.",
}, fieldKeys)
requestLatency := kitprometheus.NewSummaryFrom(stdprometheus.SummaryOpts{
Namespace: "raysonxin",
Subsystem: "arithemetic_service",
Name: "request_latency",
Help: "Total duration of requests in microseconds.",
}, fieldKeys)
var svc Service
svc = ArithmeticService{}
// add logging middleware
svc = LoggingMiddleware(logger)(svc)
svc = Metrics(requestCount, requestLatency)(svc)
endpoint := MakeArithmeticEndpoint(svc)
// add ratelimit,refill every second,set capacity 3
//ratebucket := ratelimit.NewBucket(time.Second*1, 3)
//endpoint = NewTokenBucketLimitterWithJuju(ratebucket)(endpoint)
//add ratelimit,refill every second,set capacity 3
ratebucket := rate.NewLimiter(rate.Every(time.Second*1), 100)
endpoint = NewTokenBucketLimitterWithBuildIn(ratebucket)(endpoint)
r := MakeHttpHandler(ctx, endpoint, logger)
go func() {
fmt.Println("Http Server start at port:9000")
handler := r
errChan <- http.ListenAndServe(":9000", handler)
}()
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
errChan <- fmt.Errorf("%s", <-c)
}()
fmt.Println(<-errChan)
}