File size: 1,413 Bytes
f0743f4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | /**
* A leaky bucket queue structure to manage API requests.
* @type {{queue: Array, interval: NodeJS.Timer | null}}
*/
const _LB = {
queue: [],
interval: null,
};
/**
* Interval in milliseconds to control the rate of API requests.
* Adjust the interval according to your rate limit needs.
*/
const _LB_INTERVAL_MS = Math.ceil(1000 / 60); // 60 req/s
/**
* Executes the next function in the leaky bucket queue.
* This function is called at regular intervals defined by _LB_INTERVAL_MS.
*/
const _LB_EXEC_NEXT = async () => {
if (_LB.queue.length === 0) {
clearInterval(_LB.interval);
_LB.interval = null;
return;
}
const next = _LB.queue.shift();
if (!next) {
return;
}
const { asyncFunc, args, callback } = next;
try {
const data = await asyncFunc(...args);
callback(null, data);
} catch (e) {
callback(e);
}
};
/**
* Adds an async function call to the leaky bucket queue.
* @param {Function} asyncFunc - The async function to be executed.
* @param {Array} args - Arguments to pass to the async function.
* @param {Function} callback - Callback function for handling the result or error.
*/
function LB_QueueAsyncCall(asyncFunc, args, callback) {
_LB.queue.push({ asyncFunc, args, callback });
if (_LB.interval === null) {
_LB.interval = setInterval(_LB_EXEC_NEXT, _LB_INTERVAL_MS);
}
}
module.exports = {
LB_QueueAsyncCall,
};
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