Initial commit

app/job/main/relation-cache/model/retry.go

@@ -0,0 +1,26 @@
+package model
+
+import (
+	"time"
+)
+
+// Retry is
+func Retry(attempts int, sleep time.Duration, fn func() error) error {
+	if err := fn(); err != nil {
+		if s, ok := err.(stop); ok {
+			// Return the original error for later checking
+			return s.error
+		}
+
+		if attempts--; attempts > 0 {
+			time.Sleep(sleep)
+			return Retry(attempts, 2*sleep, fn)
+		}
+		return err
+	}
+	return nil
+}
+
+type stop struct {
+	error
+}