43 lines
1.3 KiB
JavaScript
43 lines
1.3 KiB
JavaScript
/**
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* Re-runs the given function until it returns a resolved promise or the number
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* of retries is exceeded, whichever comes first (with an optional delay in
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* between retries).
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*
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* @param {object} args - A set of arguments and options.
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* @param {number} args.retries - The maximum number of times to re-run the
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* function on failure.
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* @param {number} args.delay - The amount of time (in milliseconds) to wait in
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* between retries. (Default: 0)
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* @param {string} args.rejectionMessage - The message for the rejected promise
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* this function will return in the event of failure. (Default: "Retry limit
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* reached")
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* @param {Function} functionToRetry - The function that is run and tested for
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* failure.
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* @returns {Promise<null | Error>} a promise that either resolves to null if
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* the function is successful or is rejected with rejectionMessage otherwise.
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*/
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async function retry(
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{ retries, delay = 0, rejectionMessage = 'Retry limit reached' },
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functionToRetry,
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) {
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let attempts = 0;
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while (attempts <= retries) {
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if (attempts > 0 && delay > 0) {
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await new Promise((resolve) => setTimeout(resolve, delay));
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}
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try {
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await functionToRetry();
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return;
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} catch (error) {
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console.error(error);
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} finally {
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attempts += 1;
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}
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}
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throw new Error(rejectionMessage);
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}
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module.exports = { retry };
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