137 lines
3.7 KiB
Go
137 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 timescale-reader main function to start the timescale-reader 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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"github.com/jmoiron/sqlx"
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chclient "github.com/mainflux/callhome/pkg/client"
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"github.com/mainflux/mainflux"
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"github.com/mainflux/mainflux/internal"
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authclient "github.com/mainflux/mainflux/internal/clients/grpc/auth"
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pgclient "github.com/mainflux/mainflux/internal/clients/postgres"
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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/uuid"
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"github.com/mainflux/mainflux/readers"
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"github.com/mainflux/mainflux/readers/api"
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"github.com/mainflux/mainflux/readers/timescale"
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"golang.org/x/sync/errgroup"
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)
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const (
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svcName = "timescaledb-reader"
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envPrefixDB = "MF_TIMESCALE_"
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envPrefixHTTP = "MF_TIMESCALE_READER_HTTP_"
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defDB = "messages"
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defSvcHTTPPort = "9011"
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)
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type config struct {
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LogLevel string `env:"MF_TIMESCALE_READER_LOG_LEVEL" envDefault:"info"`
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SendTelemetry bool `env:"MF_SEND_TELEMETRY" envDefault:"true"`
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InstanceID string `env:"MF_TIMESCALE_READER_INSTANCE_ID" envDefault:""`
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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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var exitCode int
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defer mflog.ExitWithError(&exitCode)
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if cfg.InstanceID == "" {
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if cfg.InstanceID, err = uuid.New().ID(); err != nil {
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logger.Error(fmt.Sprintf("failed to generate instanceID: %s", err))
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exitCode = 1
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return
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}
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}
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dbConfig := pgclient.Config{Name: defDB}
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if err := dbConfig.LoadEnv(envPrefixDB); err != nil {
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logger.Error(err.Error())
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exitCode = 1
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return
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}
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db, err := pgclient.Connect(dbConfig)
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if err != nil {
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logger.Error(err.Error())
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}
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defer db.Close()
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repo := newService(db, logger)
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ac, acHandler, err := authclient.Setup(svcName)
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if err != nil {
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logger.Error(err.Error())
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exitCode = 1
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return
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}
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defer acHandler.Close()
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logger.Info("Successfully connected to auth grpc server " + acHandler.Secure())
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tc, tcHandler, err := authclient.SetupAuthz(svcName)
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if err != nil {
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logger.Error(err.Error())
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exitCode = 1
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return
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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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httpServerConfig := server.Config{Port: defSvcHTTPPort}
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if err := env.Parse(&httpServerConfig, env.Options{Prefix: envPrefixHTTP}); err != nil {
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logger.Error(fmt.Sprintf("failed to load %s HTTP server configuration : %s", svcName, err))
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exitCode = 1
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return
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}
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hs := httpserver.New(ctx, cancel, svcName, httpServerConfig, api.MakeHandler(repo, ac, tc, svcName, cfg.InstanceID), 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("Timescale reader service terminated: %s", err))
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}
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}
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func newService(db *sqlx.DB, logger mflog.Logger) readers.MessageRepository {
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svc := timescale.New(db)
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svc = api.LoggingMiddleware(svc, logger)
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counter, latency := internal.MakeMetrics("timescale", "message_reader")
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svc = api.MetricsMiddleware(svc, counter, latency)
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return svc
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}
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