121 lines
3.7 KiB
Go
121 lines
3.7 KiB
Go
// Copyright (c) Mainflux
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// SPDX-License-Identifier: Apache-2.0
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// Package main contains http-adapter main function to start the http-adapter service.
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package main
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import (
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"context"
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"fmt"
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"log"
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"os"
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chclient "github.com/mainflux/callhome/pkg/client"
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"github.com/mainflux/mainflux"
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adapter "github.com/mainflux/mainflux/http"
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"github.com/mainflux/mainflux/http/api"
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"github.com/mainflux/mainflux/http/tracing"
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"github.com/mainflux/mainflux/internal"
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thingsClient "github.com/mainflux/mainflux/internal/clients/grpc/things"
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jaegerClient "github.com/mainflux/mainflux/internal/clients/jaeger"
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"github.com/mainflux/mainflux/internal/env"
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"github.com/mainflux/mainflux/internal/server"
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httpserver "github.com/mainflux/mainflux/internal/server/http"
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mflog "github.com/mainflux/mainflux/logger"
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"github.com/mainflux/mainflux/pkg/messaging"
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"github.com/mainflux/mainflux/pkg/messaging/brokers"
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pstracing "github.com/mainflux/mainflux/pkg/messaging/tracing"
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"github.com/mainflux/mainflux/things/policies"
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"go.opentelemetry.io/otel/trace"
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"golang.org/x/sync/errgroup"
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)
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const (
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svcName = "http_adapter"
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envPrefix = "MF_HTTP_ADAPTER_"
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envPrefixHttp = "MF_HTTP_ADAPTER_HTTP_"
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defSvcHttpPort = "80"
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)
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type config struct {
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LogLevel string `env:"MF_HTTP_ADAPTER_LOG_LEVEL" envDefault:"info"`
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BrokerURL string `env:"MF_BROKER_URL" envDefault:"nats://localhost:4222"`
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JaegerURL string `env:"MF_JAEGER_URL" envDefault:"http://jaeger:14268/api/traces"`
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SendTelemetry bool `env:"MF_SEND_TELEMETRY" envDefault:"true"`
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}
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func main() {
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ctx, cancel := context.WithCancel(context.Background())
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g, ctx := errgroup.WithContext(ctx)
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cfg := config{}
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if err := env.Parse(&cfg); err != nil {
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log.Fatalf("failed to load %s configuration : %s", svcName, err)
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}
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logger, err := mflog.New(os.Stdout, cfg.LogLevel)
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if err != nil {
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log.Fatalf("failed to init logger: %s", err)
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}
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tc, tcHandler, err := thingsClient.Setup(envPrefix, cfg.JaegerURL)
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if err != nil {
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logger.Fatal(err.Error())
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}
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defer tcHandler.Close()
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logger.Info("Successfully connected to things grpc server " + tcHandler.Secure())
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tp, err := jaegerClient.NewProvider(svcName, cfg.JaegerURL)
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if err != nil {
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logger.Error(fmt.Sprintf("Failed to init Jaeger: %s", err))
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}
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defer func() {
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if err := tp.Shutdown(ctx); err != nil {
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logger.Error(fmt.Sprintf("Error shutting down tracer provider: %v", err))
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}
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}()
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tracer := tp.Tracer(svcName)
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pub, err := brokers.NewPublisher(cfg.BrokerURL)
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if err != nil {
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logger.Fatal(fmt.Sprintf("failed to connect to message broker: %s", err))
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}
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pub = pstracing.New(tracer, pub)
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defer pub.Close()
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svc := newService(pub, tc, logger, tracer)
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httpServerConfig := server.Config{Port: defSvcHttpPort}
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if err := env.Parse(&httpServerConfig, env.Options{Prefix: envPrefixHttp, AltPrefix: envPrefix}); err != nil {
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logger.Fatal(fmt.Sprintf("failed to load %s HTTP server configuration : %s", svcName, err))
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}
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hs := httpserver.New(ctx, cancel, svcName, httpServerConfig, api.MakeHandler(svc), logger)
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if cfg.SendTelemetry {
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chc := chclient.New(svcName, mainflux.Version, logger, cancel)
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go chc.CallHome(ctx)
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}
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g.Go(func() error {
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return hs.Start()
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})
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g.Go(func() error {
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return server.StopSignalHandler(ctx, cancel, logger, svcName, hs)
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})
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if err := g.Wait(); err != nil {
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logger.Error(fmt.Sprintf("HTTP adapter service terminated: %s", err))
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}
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}
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func newService(pub messaging.Publisher, tc policies.ThingsServiceClient, logger mflog.Logger, tracer trace.Tracer) adapter.Service {
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svc := adapter.New(pub, tc)
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svc = tracing.New(tracer, svc)
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svc = api.LoggingMiddleware(svc, logger)
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counter, latency := internal.MakeMetrics(svcName, "api")
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svc = api.MetricsMiddleware(svc, counter, latency)
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return svc
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}
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