112 lines
2.6 KiB
Go
112 lines
2.6 KiB
Go
package main
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import (
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"log"
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"net/http"
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"os"
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"os/signal"
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"syscall"
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"time"
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apiv1 "git.ar21.de/yolokube/country-geo-locations/api/v1"
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"git.ar21.de/yolokube/country-geo-locations/internal/cache"
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"git.ar21.de/yolokube/country-geo-locations/internal/cmd"
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csvimporter "git.ar21.de/yolokube/country-geo-locations/internal/csv_importer"
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"git.ar21.de/yolokube/country-geo-locations/internal/database"
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"git.ar21.de/yolokube/country-geo-locations/internal/downloader"
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"git.ar21.de/yolokube/country-geo-locations/internal/exporter"
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"github.com/go-chi/chi/v5"
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"github.com/go-chi/chi/v5/middleware"
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"github.com/go-chi/render"
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)
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func main() {
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cli := cmd.CLI{}
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config, err := cli.Parse()
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if err != nil {
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log.Fatal(err)
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}
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handleGracefulShutdown()
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r := chi.NewRouter()
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r.Use(middleware.RequestID)
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r.Use(middleware.Logger)
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r.Use(middleware.Recoverer)
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r.Use(render.SetContentType(render.ContentTypeJSON))
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ctx := downloader.NewContext(config.DataFile, config.DataURL)
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if !ctx.FileExists() {
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if downloadErr := ctx.Download(); downloadErr != nil {
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log.Fatal(downloadErr)
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}
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log.Printf("saved file to %s\n", ctx.Filename)
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}
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cache := cache.NewCache(config.CacheTTL)
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db, err := database.NewDatabase(config)
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if err != nil {
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log.Fatal("database creation failed", err)
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}
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if config.EnableExporter {
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exporter := exporter.NewExporter(config, cache, db)
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r.Use(exporter.Middleware())
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ticker := time.NewTicker(config.ExporterInterval)
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exit := make(chan struct{})
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go func() {
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for {
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select {
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case <-ticker.C:
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exporter.Collect()
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case <-exit:
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ticker.Stop()
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return
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}
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}
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}()
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log.Println("prometheus exporter refreshes metric data every", config.ExporterInterval)
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go func() {
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err = exporter.Start()
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if err != nil {
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log.Panic(err)
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}
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}()
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log.Println("prometheus exporter started at", config.ExporterAddress)
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}
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log.Println("importing data from file", config.DataFile)
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err = csvimporter.ImportCSV(config.DataFile, db)
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if err != nil {
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log.Fatal("data Import from file failed", err)
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}
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log.Println("imported data from file successful")
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lh := apiv1.NewLocationHandler(cache, db)
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r.Mount("/api/v1", apiv1.NewRouter(lh))
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server := &http.Server{
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Addr: config.ServerAddress,
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Handler: r,
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ReadHeaderTimeout: config.ReadHeaderTimeout,
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}
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log.Println("starting server at", server.Addr)
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if err = server.ListenAndServe(); err != nil {
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log.Panic(err)
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}
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}
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func handleGracefulShutdown() {
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var signals = make(chan os.Signal, 1)
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signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT)
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go func() {
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sig := <-signals
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log.Printf("caught signal: %+v", sig)
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os.Exit(0)
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}()
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}
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