How do you make a CreateOrder endpoint idempotent at the LLD level?

Problem Statement

Explanation

Store the first successful response against the key. On a duplicate request, return the same outcome and avoid double effects. Keep the key scoped per client and per route, and expire entries on a sensible TTL.

Code Solution

SolutionRead Only

result = store.get(key) ?? createOrder();
store.putIfAbsent(key, result);

Practice Sets

This question appears in the following practice sets:

Low-Level Design (LLD) Interview Core

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How do you make a CreateOrder endpoint idempotent at the LLD level?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

How do you make a CreateOrder endpoint idempotent at the LLD level?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which statement best describes the Single Responsibility Principle?

Open–Closed Principle encourages what practice when adding features?

High-Level Design (HLD) typically focuses on which artifacts?

Which UML diagram best captures interactions over time between components?

Which pairing describes a healthy design goal?

More from System Design

Master Interviews
Anywhere, Anytime