@twilio/voice-sdk
Version:
Twilio's JavaScript Voice SDK
76 lines (73 loc) • 5.64 kB
JavaScript
import { EventEmitter } from 'events';
// @ts-nocheck
// NOTE (csantos): This file was taken directly from twilio-video and has been renamed from JS to TS only.
// It needs to be re-written as part of the overall updating of the files to TS.
class Backoff extends EventEmitter {
/**
* Construct a {@link Backoff}.
* @param {object} options
* @property {number} min - Initial timeout in milliseconds [100]
* @property {number} max - Max timeout [10000]
* @property {number} jitter - Apply jitter [0]
* @property {number} factor - Multiplication factor for Backoff operation [2]
* @property {boolean} useInitialValue - Whether to use the initial value on the first backoff call [false]
*/
constructor(options) {
super();
Object.defineProperties(this, {
_attempts: {
value: 0,
writable: true,
},
_duration: {
enumerable: false,
get() {
if (this._useInitialValue && this._attempts === 0) {
return this._min;
}
let ms = this._min * Math.pow(this._factor, this._attempts);
if (this._jitter) {
const rand = Math.random();
const deviation = Math.floor(rand * this._jitter * ms);
// tslint:disable-next-line
ms = (Math.floor(rand * 10) & 1) === 0 ? ms - deviation : ms + deviation;
}
// tslint:disable-next-line
return Math.min(ms, this._max) | 0;
},
},
_factor: { value: options.factor || 2 },
_jitter: { value: options.jitter > 0 && options.jitter <= 1 ? options.jitter : 0 },
_max: { value: options.max || 10000 },
_min: { value: options.min || 100 },
_timeoutID: {
value: null,
writable: true,
},
_useInitialValue: {
value: options.useInitialValue || false,
},
});
}
backoff() {
const duration = this._duration;
if (this._timeoutID) {
clearTimeout(this._timeoutID);
this._timeoutID = null;
}
this.emit('backoff', this._attempts, duration);
this._timeoutID = setTimeout(() => {
this.emit('ready', this._attempts, duration);
this._attempts++;
}, duration);
}
reset() {
this._attempts = 0;
if (this._timeoutID) {
clearTimeout(this._timeoutID);
this._timeoutID = null;
}
}
}
export { Backoff as default };
//# sourceMappingURL=data:application/json;charset=utf-8;base64,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