redis-smq-common/dist/esm/src/timer/timer.js

Provides essential components and utilities shared across RedisSMQ packages.

import { clearTimeout } from 'node:timers';
import { Runnable } from '../runnable/index.js';
export class Timer extends Runnable {
    timer = null;
    logger;
    constructor(logger) {
        super();
        this.logger = logger.createLogger(this.constructor.name);
    }
    goingUp() {
        return super.goingUp().concat([
            (cb) => {
                this.reset();
                cb();
            },
        ]);
    }
    goingDown() {
        return [
            (cb) => {
                this.reset();
                cb();
            },
        ].concat(super.goingDown());
    }
    schedule = (fn, delayMs) => {
        if (!this.isRunning()) {
            this.logger.debug('Instance not operational - Skipping next tick scheduling');
            return false;
        }
        if (this.timer) {
            this.logger.debug('Could not schedule the requested operation: timer is busy');
            return false;
        }
        this.timer = setTimeout(() => {
            this.timer = null;
            if (this.isRunning())
                fn();
        }, delayMs);
        return true;
    };
    reset() {
        if (this.timer) {
            this.logger.debug('Resetting nextTick schedule...');
            clearTimeout(this.timer);
            this.timer = null;
        }
    }
}
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