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app.go
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app.go
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package golaze
import (
"context"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
type AppConfig struct {
Name string
Version string
LogLevel zerolog.Level
HealthCheck *HealthCheck
WebApp *WebApp
Worker *Worker
}
type App struct {
*AppConfig
}
func NewApp(config *AppConfig) *App {
if config.LogLevel == zerolog.NoLevel {
config.LogLevel = zerolog.InfoLevel
}
if config.HealthCheck == nil {
config.HealthCheck = NewHealthCheck(
&HealthCheckConfig{},
)
}
if config.WebApp != nil && config.WebApp.Port == "" {
config.WebApp.Port = "8080"
}
return &App{
config,
}
}
func (app *App) AddWorker(worker *Worker) {
app.Worker = worker
}
func (app *App) Run() error {
zerolog.SetGlobalLevel(app.LogLevel)
shutdown := make(chan bool, 1)
signals := make(chan os.Signal, 1)
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)
go func() {
s := <-signals
log.Info().Msgf("received signal: %v", s)
shutdown <- true
}()
healthServer := &http.Server{
Addr: ":" + app.HealthCheck.Port,
Handler: app.HealthCheck.Router,
ReadTimeout: 5 * time.Second,
WriteTimeout: 5 * time.Second,
MaxHeaderBytes: 1 << 20,
}
ctx, shutdownRelease := context.WithTimeout(context.Background(), 10*time.Second)
defer shutdownRelease()
go func() {
log.Info().Msgf("starting health check server on port %s", app.HealthCheck.Port)
if err := healthServer.ListenAndServe(); err != nil {
log.Fatal().Err(err).Msg("health check server failed")
}
if err := healthServer.Shutdown(ctx); err != nil {
log.Fatal().Err(err).Msg("health check server shutdown failed")
}
}()
if app.WebApp != nil {
webAppServer := &http.Server{
Addr: ":" + app.WebApp.Port,
Handler: app.WebApp.Router,
ReadTimeout: 5 * time.Second,
WriteTimeout: 5 * time.Second,
MaxHeaderBytes: 1 << 20,
}
go func() {
log.Info().Msg("starting main server on port 8080")
if err := webAppServer.ListenAndServe(); err != nil {
log.Fatal().Err(err).Msg("main server failed")
}
if err := webAppServer.Shutdown(ctx); err != nil {
log.Fatal().Err(err).Msg("main server shutdown failed")
}
}()
}
if app.Worker != nil {
go func() {
log.Info().Msg("starting worker")
app.Worker.Start()
}()
}
<-shutdown
log.Info().Msg("shutting down")
return nil
}