@daiso-tech/core
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The library offers flexible, framework-agnostic solutions for modern web applications, built on adaptable components that integrate seamlessly with popular frameworks like Next Js.
61 lines • 1.93 kB
JavaScript
/**
* @module BackoffPolicy
*/
import {} from "../../../backoff-policies/contracts/_module.js";
import { TO_MILLISECONDS, } from "../../../time-span/contracts/_module.js";
import { TimeSpan } from "../../../time-span/implementations/_module.js";
import { callInvokable, isInvokable, withJitter } from "../../../utilities/_module.js";
/**
* @internal
*/
export function resolveConstantBackoffSettings(settings) {
const { delay = TimeSpan.fromSeconds(1), jitter = 0.5, _mathRandom = Math.random, } = settings;
if (!(delay[TO_MILLISECONDS]() > 0)) {
throw new TypeError("'delay' must be positive");
}
if (jitter !== null && !(jitter >= 0 && jitter <= 1)) {
throw new TypeError("'jitter' must be between 0 and 1 or null");
}
return {
delay,
jitter,
_mathRandom,
};
}
/**
* Constant backoff policy with jitter
*
* IMPORT_PATH: `"@daiso-tech/core/backoff-policies"`
* @group Implementations
*/
export function constantBackoff(settings = {}) {
return (_attempt, error) => {
if (isInvokable(settings)) {
const dynamicSettings = callInvokable(settings, error);
if (dynamicSettings === undefined) {
settings = {};
}
else {
settings = dynamicSettings;
}
}
const { delay, jitter, _mathRandom } = resolveConstantBackoffSettings(settings);
return TimeSpan.fromMilliseconds(withJitter({
jitter,
value: delay[TO_MILLISECONDS](),
randomValue: _mathRandom(),
}));
};
}
/**
* @internal
*/
export function serializeConstantBackoffSettings(settings) {
const { delay, jitter, _mathRandom } = resolveConstantBackoffSettings(settings);
return {
delay: delay[TO_MILLISECONDS](),
jitter,
_mathRandom: _mathRandom(),
};
}
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