59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
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/**
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* A leaky bucket queue structure to manage API requests.
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* @type {{queue: Array, interval: NodeJS.Timer | null}}
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*/
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const _LB = {
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queue: [],
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interval: null,
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};
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/**
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* Interval in milliseconds to control the rate of API requests.
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* Adjust the interval according to your rate limit needs.
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*/
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const _LB_INTERVAL_MS = Math.ceil(1000 / 60); // 60 req/s
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/**
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* Executes the next function in the leaky bucket queue.
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* This function is called at regular intervals defined by _LB_INTERVAL_MS.
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*/
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const _LB_EXEC_NEXT = async () => {
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if (_LB.queue.length === 0) {
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clearInterval(_LB.interval);
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_LB.interval = null;
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return;
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}
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const next = _LB.queue.shift();
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if (!next) {
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return;
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}
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const { asyncFunc, args, callback } = next;
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try {
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const data = await asyncFunc(...args);
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callback(null, data);
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} catch (e) {
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callback(e);
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}
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};
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/**
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* Adds an async function call to the leaky bucket queue.
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* @param {Function} asyncFunc - The async function to be executed.
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* @param {Array} args - Arguments to pass to the async function.
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* @param {Function} callback - Callback function for handling the result or error.
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*/
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function LB_QueueAsyncCall(asyncFunc, args, callback) {
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_LB.queue.push({ asyncFunc, args, callback });
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if (_LB.interval === null) {
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_LB.interval = setInterval(_LB_EXEC_NEXT, _LB_INTERVAL_MS);
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}
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}
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module.exports = {
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LB_QueueAsyncCall,
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};
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