rx-retry/lib/promises/resolve-retry.js

Package for retries in RxJS, Promises and NestJS

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveWithRetry = void 0;
const rxjs_1 = require("rxjs");
const retry_backoff_1 = require("../operators/retry-backoff");
const resolve_retry_config_1 = require("./resolve-retry-config");
/**
 * Retry a promise with exponential backoff.
 * ```ts
    const prm = new Promise((resolve, reject) => {
        setTimeout(() => {
            reject(new Error('Promise error'));
        }, 1000);
    });

    const configuration: ResolveRetryConfig = {
        timeoutTime: 5000, // set timeout to fail the promise and retry, default is 0
        useJitter: true, // backoff strategy with random + exponantial delay, default is true
        retryStrategy: {
            initialInterval: 1000, // ms
            maxRetries: 3,
            maxInterval: 10000, // ms
            shouldRetry: (error) => true, // check if retry needed, default is always true
        }
    }
    const res = await resolveWithRetry(prm, configuration);
 * ```
 * @param promise - Promise to resolve
 * @param config - Configuration for retry, can be number as the initial interval, OR ResolveRetryConfig
 * @returns Resolved value of the promise with type T (Generic)
 */
function resolveWithRetry(promise, config) {
    const selectedConfig = typeof config === 'number'
        ? { ...resolve_retry_config_1.DEFAULT_RESOLVE_RETRY_CONFIG, retryStrategy: { initialInterval: config } }
        : config;
    const { retryStrategy, useJitter = resolve_retry_config_1.DEFAULT_RESOLVE_RETRY_CONFIG.useJitter, timeoutTime = resolve_retry_config_1.DEFAULT_RESOLVE_RETRY_CONFIG.timeoutTime, } = selectedConfig;
    retryStrategy.backoffDelay ??= useJitter ? retry_backoff_1.backoffDelayWithRandom : retry_backoff_1.exponentialBackoffDelay;
    const obs = (0, rxjs_1.from)(promise).pipe((0, rxjs_1.timeout)(timeoutTime), (0, retry_backoff_1.retryBackoff)(retryStrategy));
    return (0, rxjs_1.lastValueFrom)(obs);
}
exports.resolveWithRetry = resolveWithRetry;
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