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28 lines
744 B
28 lines
744 B
7 years ago
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// @flow
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// small utilities for Promises
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export const delay = (ms: number): Promise<void> => new Promise(f => setTimeout(f, ms))
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const defaults = {
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maxRetry: 4,
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interval: 300,
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intervalMultiplicator: 1.5,
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}
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export function retry<A>(f: () => Promise<A>, options?: $Shape<typeof defaults>): Promise<A> {
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const { maxRetry, interval, intervalMultiplicator } = { ...defaults, ...options }
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return rec(maxRetry, interval)
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function rec(remainingTry, interval) {
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const result = f()
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if (remainingTry <= 0) {
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return result
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}
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// In case of failure, wait the interval, retry the action
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return result.catch(() =>
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delay(interval).then(() => rec(remainingTry - 1, interval * intervalMultiplicator)),
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)
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}
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}
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