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Added a graceful shutdown mechanism with a configurable timeout (#8)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "net/http" | ||
| "os" | ||
| "os/signal" | ||
| "syscall" | ||
| "time" | ||
| ) | ||
|
|
||
| // serve starts a web server and ensures graceful shutdown | ||
| func (app *application) serve() error { | ||
| srv := &http.Server{ | ||
| Addr: fmt.Sprintf(":%d", app.Port), | ||
| ErrorLog: app.errorLog, | ||
| Handler: app.routes(), | ||
| IdleTimeout: time.Minute, | ||
| ReadTimeout: app.ReadTimeout, | ||
| WriteTimeout: app.WriteTimeout, | ||
| } | ||
|
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| shutdownError := make(chan error) | ||
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| go func() { | ||
| quit := make(chan os.Signal, 1) | ||
| signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM) | ||
| s := <-quit | ||
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| app.infoLog.Printf("Caught %s signal, waiting for all connections to be closed within %s", s, app.GracefulShutdownTimeout) | ||
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| ctx, cancel := context.WithTimeout(context.Background(), app.GracefulShutdownTimeout) | ||
| defer cancel() | ||
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| err := srv.Shutdown(ctx) | ||
| if err != nil { | ||
| shutdownError <- err | ||
| } | ||
|
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| shutdownError <- nil | ||
| }() | ||
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| app.infoLog.Printf("Starting server on %d", app.Port) | ||
|
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| err := srv.ListenAndServe() | ||
| if !errors.Is(err, http.ErrServerClosed) { | ||
| return err | ||
| } | ||
|
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| err = <-shutdownError | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| app.infoLog.Print("Successfully stopped server") | ||
|
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| return nil | ||
| } |