mirror of
https://github.com/haveno-dex/haveno-ts.git
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69 lines
2.3 KiB
JavaScript
69 lines
2.3 KiB
JavaScript
"use strict";
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/*
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* Copyright Haveno
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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/**
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* Run a task in a fixed period loop.
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*/
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class TaskLooper {
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/**
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* Build the looper with a function to invoke on a fixed period loop.
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*
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* @param {function} fn - the async function to invoke
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*/
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constructor(fn) {
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this._fn = fn;
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this._isStarted = false;
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this._isLooping = false;
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}
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/**
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* Start the task loop.
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*
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* @param {number} periodInMs the loop period in milliseconds
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* @param {boolean} targetFixedPeriod specifies if the task should target a fixed period by accounting for run time (default false)
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* @return {TaskLooper} this instance for chaining
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*/
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start(periodInMs, targetFixedPeriod) {
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if (periodInMs <= 0)
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throw new Error("Looper period must be greater than 0 ms");
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if (this._isStarted)
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return;
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this._isStarted = true;
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this._runLoop(periodInMs, targetFixedPeriod);
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}
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/**
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* Stop the task loop.
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*/
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stop() {
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if (!this._isStarted)
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throw new Error("Cannot stop TaskLooper because it's not started");
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this._isStarted = false;
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clearTimeout(this._timeout);
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this._timeout = undefined;
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}
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async _runLoop(periodInMs, targetFixedPeriod) {
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this._isLooping = true;
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while (this._isStarted) {
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const startTime = Date.now();
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await this._fn();
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if (this._isStarted)
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await new Promise((resolve) => { this._timeout = setTimeout(resolve, periodInMs - (targetFixedPeriod ? (Date.now() - startTime) : 0)); });
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}
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this._isLooping = false;
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}
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}
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exports.default = TaskLooper;
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//# sourceMappingURL=TaskLooper.js.map
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