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@hm-soft/retry

v0.1.0

Published

비동기 재시도 — 지수 백오프 + 지터, shouldRetry/onRetry/AbortSignal 지원 (의존성 0)

Readme

@hm-soft/retry

비동기 작업 재시도 — 지수 백오프 + 지터. 외부 API·결제·네트워크처럼 일시적으로 실패하는 작업에. 의존성 0. 대기/난수 주입으로 결정적 테스트.

설치

npm install @hm-soft/retry

사용

import { retry, withRetry } from "@hm-soft/retry";

// 최대 5번 재시도(지수 백오프 100ms → 200 → 400 …, 지터 적용)
const data = await retry(() => fetchJson(url), { retries: 5 });

// 특정 에러만 재시도 (5xx/네트워크만)
await retry(() => callApi(), {
  retries: 3,
  shouldRetry: (err) => err.status >= 500 || err.code === "ECONNRESET",
  onRetry: (err, attempt, delay) => log.warn(`재시도 ${attempt} (${delay}ms 후)`),
});

// 함수에 재시도를 입혀 재사용
const fetchUser = withRetry((id: string) => api.getUser(id), { retries: 3 });
await fetchUser("u1");

API

| 함수 | 설명 | |------|------| | retry(fn, opts?) | fn을 백오프하며 재시도, 성공값 반환 또는 마지막 에러 throw | | withRetry(fn, opts?) | 재시도를 적용한 함수를 반환 | | backoffDelay(attempt, opts?) | attempt(1-base)의 지연(ms) 계산 |

RetryOptions

| 옵션 | 기본 | 설명 | |------|------|------| | retries | 3 | 추가 재시도 횟수(총 = 1 + retries) | | minDelayMs | 100 | 첫 재시도 지연 | | maxDelayMs | 30000 | 지연 상한 | | factor | 2 | 지수 배수 | | jitter | "full" | "full"(0~계산값 랜덤) / "none" | | shouldRetry | 항상 | (error, attempt) => boolean | | onRetry | — | 재시도 직전 콜백 | | signal | — | AbortSignal로 중단 | | sleep / random | — | 테스트 주입용 |

License

Apache-2.0