machinomy/lib/Mutex.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const await_semaphore_1 = require("await-semaphore");
class Mutex {
    constructor() {
        this.queues = new Map();
    }
    synchronize(task) {
        return this.synchronizeOn(Mutex.DEFAULT_QUEUE, task);
    }
    async synchronizeOn(key, task) {
        let semaphore = this.queues.get(key);
        if (!semaphore) {
            semaphore = new await_semaphore_1.Semaphore(1);
            this.queues.set(key, semaphore);
        }
        return semaphore.use(task);
    }
}
Mutex.DEFAULT_QUEUE = '__MUTEX_DEFAULT_QUEUE';
exports.default = Mutex;
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