NasriyaCron.

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Made with ❤️ in Palestine 🇵🇸

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Overview

Easily generate cron-expressions, schedule periodic cron jobs as well as time specific tasks.

Important

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Installation

npm i @nasriya/cron

Importing

Import in ES6 module

import cron from '@nasriya/cron';

Import in CommonJS (CJS)

const cron = require('@nasriya/cron').default;

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Usage

Generate Time Expressions

Use the time module on the cron manager to easily generate cron-expressions.

// Runs every 5 minutes
const expression1: string = cron.time.every(5).minutes();

// Runs every Monday and Tuesday
const expression2: string = cron.time.onSpecificDays(['Tue', 2]);

Schedule a Periodic Task

To schedule tasks using a cron-expression, use the schedule method:

const task: ScheduledTask = cron.schedule('* * * * *', () => {
    console.log('A cron-job is running...');
}, {
    name: 'test_task',          // (Optional) The name of the task
    timezone: 'Asia/Jerusalem', // (Optional) The timezone the task will run at
    runOnInit: false            // (Optional) Set to "true" to run immediately
})

The schedule method returns a ScheduledTask type:

interface ScheduledTask {
    name: string;                   // The name of the task
    start: () => void;              // Start/resume the task
    stop: () => void;               // Pause the task
    destroy: () => Promise<void>;   // Destroy the task
}

Schedule a One-Time Task

To schedule one-time tasks use the scheduleTime method. The method takes two arguments:

1. time: A timestamp number, an ISO date, or a Date instance.
2. task: a function.

// Schedule a task to run after 10 minutes from now:
const tenMins = 10 * 60 * 1000;
const task: ScheduledTimedTask = cron.scheduleTime(Date.now() + tenMins, () => {
    console.log('Ten minutes has elapsed since the task was first scheduled')
})

The scheduleTime method returns a ScheduledTimedTask type:

interface ScheduledTimedTask {
    name: string;                   // The name of the task
    cancel: () => void;             // Cancel the task
    invoke: () => void;             // Invoke the task
    destroy: () => Promise<void>;   // Destroy the task
}

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License

This software is licensed under the Nasriya Open License (NOL), version 1.0. Please read the license from here.