cron-task

cron-task is a module for scheduling tasks at specific time intervals using cron expressions or milliseconds. You can easily add, remove, start, and stop tasks.

Installation

To install cron-task, run the following command:

npm install cron-task

Usage

const { CronTaskScheduler } = require('cron-task');

// Create scheduler instance
const scheduler = new CronTaskScheduler();

// Add a simple "Hello World" task that runs every 3 seconds
scheduler.addTask({
  name: 'helloWorldTask',
  interval: 3000, // 3 seconds in milliseconds
  onTick: () => {
    console.log('Hello World!', new Date().toLocaleTimeString());
  }
});

console.log('Scheduler started. Press Ctrl+C to stop.');

API

Task class

• task: Object describing the task with the following properties:
  • id: unique uuid for task (this not be send on creation)
  • name: Unique name for the task.
  • category (optional): Task category.
  • interval: Interval in milliseconds or cron expression.
  • onTick: Function executed at each interval.

Methods

• addTask(task: Omit<Task, 'id'>): Task
• getTasks(): Task[]
• getTaskById(id:string): void
• getTasksByName(name: string): Task[]
• getTasksByCategory(category: string): Task[]
• removeTaskById(id:string): void
• removeTaskByName(name: string): void
• removeTasksByCategory(category: string): void
• removeAllTasks(): void
• startTaskById(id: string): void
• startTaskByName(name: string): void
• stopTaskByName(name: string): void
• stopAllTasksByCategory(category: string): void
• updateTaskById(id:string): void

Cron Expression

* * * * * 
- - - - -
| | | | |
| | | | +---- Day of the week (0 - 7) (Sunday=0 or 7)
| | | +------ Month (1 - 12)
| | +-------- Day of the month (1 - 31)
| +---------- Hour (0 - 23)
+------------ Minute (0 - 59)

Contribution

If you encounter any issues or have suggestions, feel free to open an issue or submit a pull request.

Thanks for contributing!