pkg/export/bench/server.go

// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"context"
	"flag"
	"log"
	"net"
	"net/http"
	_ "net/http/pprof" // Comment this line to disable pprof endpoint.
	"time"

	monitoring_pb "cloud.google.com/go/monitoring/apiv3/v2/monitoringpb"
	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
	"github.com/prometheus/client_golang/prometheus/promhttp"
	"google.golang.org/grpc"
	_ "google.golang.org/grpc/encoding/gzip"
	"google.golang.org/protobuf/types/known/emptypb"
)

func main() {
	var (
		listenAddress  = flag.String("listen-address", ":10001", "The address to listen on for HTTP requests.")
		metricsAddress = flag.String("metrics-address", ":10002", "The address to listen on for Prometheus metrics requests.")
		backendLatency = flag.Duration("latency", 100*time.Millisecond, "The latency of the CreateTimeSeries requests as a Go duration")
	)
	flag.Parse()
	listener, err := net.Listen("tcp", *listenAddress)
	if err != nil {
		log.Fatalln("failed to listen on primary port:", err)
	}
	grpc_prometheus.EnableHandlingTimeHistogram()

	srv := grpc.NewServer(
		grpc.StreamInterceptor(grpc_prometheus.StreamServerInterceptor),
		grpc.UnaryInterceptor(grpc_prometheus.UnaryServerInterceptor),
	)
	monitoring_pb.RegisterMetricServiceServer(srv, &server{latency: *backendLatency})

	grpc_prometheus.Register(srv)
	http.Handle("/metrics", promhttp.Handler())

	go func() {
		log.Fatal(http.ListenAndServe(*metricsAddress, nil))
	}()

	if err := srv.Serve(listener); err != nil {
		log.Fatalln("failed to server:", err)
	}
}

type server struct {
	monitoring_pb.MetricServiceServer
	latency time.Duration
}

func (srv *server) CreateTimeSeries(context.Context, *monitoring_pb.CreateTimeSeriesRequest) (*emptypb.Empty, error) {
	time.Sleep(srv.latency)
	return &emptypb.Empty{}, nil
}