28 lines
821 B
TypeScript
28 lines
821 B
TypeScript
/**
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* Declares a strategy to handle reconnection.
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* When a number is returned, that number of MS will be waited before trying to reconnect.
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* When `false` is returned, connection is not reconnected
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*/
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export type ReconnectionStrategy<T> = (
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params: T,
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lastError: Error | null,
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consequentFails: number,
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previousWait: number | null
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) => number | false
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/**
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* default reconnection strategy: first - immediate reconnection,
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* then 1s with linear increase up to 5s (with 1s step)
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*/
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export const defaultReconnectionStrategy: ReconnectionStrategy<object> = (
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params,
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lastError,
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consequentFails,
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previousWait,
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) => {
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if (previousWait === null) return 0
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if (previousWait === 0) return 1000
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if (previousWait >= 5000) return 5000
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return Math.min(5000, previousWait + 1000)
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}
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