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main.go
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main.go
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// Package main is the starting point of knock-knock
package main
import (
"flag"
"os"
"strconv"
"sync"
"time"
// Black import (_) is for running a package's init() function without using its other contents.
"github.com/rs/zerolog/log"
_ "github.com/yunkon-kim/knock-knock/internal/config"
_ "github.com/yunkon-kim/knock-knock/internal/logger"
//_ "github.com/go-sql-driver/mysql"
"github.com/fsnotify/fsnotify"
"github.com/spf13/viper"
restServer "github.com/yunkon-kim/knock-knock/pkg/api/rest/server"
frontendServer "github.com/yunkon-kim/knock-knock/web/server"
)
func main() {
log.Info().Msg("starting knock-knock server")
// Set the default backendPort number "8056" for the REST API server to listen on
backendPort := flag.String("backendPort", "8056", "port number for the restapiserver to listen to")
flag.Parse()
// Validate port
if portInt, err := strconv.Atoi(*backendPort); err != nil || portInt < 1 || portInt > 65535 {
log.Fatal().Msgf("%s is not a valid port number. Please retry with a valid port number (ex: -port=[1-65535]).", *backendPort)
}
log.Debug().Msgf("backend port number: %s", *backendPort)
// Set the default frontendPort number "8888" for the REST API server to listen on
frontendPort := flag.String("frontendPort", "8888", "port number for the frontendServer to listen to")
flag.Parse()
// Validate port
if portInt, err := strconv.Atoi(*frontendPort); err != nil || portInt < 1 || portInt > 65535 {
log.Fatal().Msgf("%s is not a valid port number. Please retry with a valid port number (ex: -port=[1-65535]).", *backendPort)
}
log.Debug().Msgf("frontend port number: %s", *frontendPort)
//Setup database (meta_db/dat/knockknock.s3db)
log.Info().Msg("setting SQL Database")
err := os.MkdirAll("./meta_db/dat/", os.ModePerm)
if err != nil {
log.Error().Err(err).Msg("error creating directory")
}
log.Debug().Msgf("database file path: %s", "./meta_db/dat/knockknock.s3db")
// Watch config file changes
go func() {
viper.WatchConfig()
viper.OnConfigChange(func(e fsnotify.Event) {
log.Debug().Str("file", e.Name).Msg("config file changed")
err := viper.ReadInConfig()
if err != nil { // Handle errors reading the config file
log.Fatal().Err(err).Msg("fatal error in config file")
}
// err = viper.Unmarshal(&common.RuntimeConf)
if err != nil {
log.Panic().Err(err).Msg("error unmarshaling runtime configuration")
}
})
}()
// Launch API servers (REST)
wg := new(sync.WaitGroup)
wg.Add(1)
// Start REST Server
go func() {
restServer.RunServer(*backendPort)
wg.Done()
}()
wg.Add(1)
// Start Frontend Server
go func() {
frontendServer.RunFrontendServer(*frontendPort)
wg.Done()
}()
time.Sleep(1 * time.Second)
restServer.DisplayEndpoints()
frontendServer.DisplayEndpoints()
wg.Wait()
}