feat(common): add retry function

common/retry.go

@@ -0,0 +1,37 @@
+package common
+
+import (
+	"fmt"
+	"time"
+)
+
+/*
+	If there is an error in the performed function, it will be restarted, this process will be repeated the given number of times
+
+	e.g.
+
+		err := Retry(3, 5*time.Second, connectToDB)
+
+		if err != nil {
+			Log.Error(err)
+		}
+*/
+func Retry(attempts int, sleep time.Duration, f func() error) (err error) {
+	for i := 0; ; i++ {
+		err = f()
+		if err == nil {
+			return
+		}
+
+		if i >= (attempts - 1) {
+			break
+		}
+
+		time.Sleep(sleep)
+		sleep *= 2
+
+		Log.Error("Retrying after error: ", err)
+	}
+
+	return fmt.Errorf("after %d attempts, last error: %s", attempts, err)
+}

main.go

@@ -0,0 +1,3 @@
+package main
+
+func main() {}