@openevstack/ocpp-rpc/dist/src/utils/queue.js

⚡ A lightweight, production-ready RPC server built with Express and WebSocket for handling OCPP-based EV charger communication. Part of the OpenEVStack ecosystem.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
class Queue {
    constructor() {
        this._pending = 0;
        this._concurrency = Infinity;
        this._queue = [];
    }
    setConcurrency(concurrency) {
        this._concurrency = concurrency;
        this._next();
    }
    push(fn) {
        return new Promise((resolve, reject) => {
            this._queue.push({ fn, resolve, reject });
            this._next();
        });
    }
    async _next() {
        if (this._pending >= this._concurrency)
            return;
        const job = this._queue.shift();
        if (!job)
            return;
        this._pending++;
        try {
            const result = await job.fn();
            job.resolve(result);
        }
        catch (error) {
            job.reject(error);
        }
        finally {
            this._pending--;
            this._next(); // continue processing remaining jobs
        }
    }
}
exports.default = Queue;