npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

mini-task-loop

v2.0.1

Published

a simple javascript (node.js) library for managing scheduled async tasks for a loop.

Downloads

6

Readme

📦 mini-task-loop

📌 a simple javascript (node.js) library for managing scheduled async tasks for a loop.

Install

$ npm install mini-task-loop

Example

const TaskLoop = require('mini-task-loop');

// create our task loop with strict mode
let taskloop = new TaskLoop(true).runTaskLoop();

function test1()
{
	let counter = 0;

	// add first task run every 1000 milliseconds
	taskloop.addTask('first', 1000, (task_id) =>
	{
		counter ++;
		console.log(task_id + ' : ' + counter);

		// pause this task for 3 seconds when arriving 5 runs
		if (counter == 5)
		{
			taskloop.pauseTask(task_id);
			setTimeout(() => { taskloop.resumeTask(task_id); }, 3000);
			console.log(task_id + ' : waiting 3 seconds');
		}

		// remove this task after 10 runs
		if (counter >= 10)
		{
			taskloop.removeTask(task_id);
			console.log(task_id + ' : done');
		}

	}).executeOnce(); // make this task execute immediately after it's add
}

function test2()
{
	// using an object as the task id, run every 5 seconds.
	let obj = { id: 'second', foo: 'bar', counter: 0 };

	taskloop.addTask(obj, 5000, (task) =>
	{
		task.counter ++;
		console.log(task.id + ' : ' + task.counter);

		// stop the task loop after 4 runs
		if (task.counter >= 4)
		{
			// remove all task at this time
			taskloop.stopTaskLoop(true);
			console.log(task.id + ' : stop and exit');
		}
	});
}

test1();
test2();

// show all tasks we just added
console.log(taskloop.queryTask());

API

TaskLoop([strict_mode])

Constructor function of TaskLoop class. An optional boolean to set strict mode of this object. When strict mode is enabled, any operation of task will throw a runtime error if task id not matching in the loop.

runTaskLoop([loop_polling_interval])

Start running the task loop.

  • @number loop_polling_interval : an integer to specify how many milliseconds between each process frame of task loop. default 100.
    • set this value based on average interval of tasks, smaller value means lower process latency of task scheduling.

stopTaskLoop([remove_all_task])

Stop running the task loop, existing tasks will be retained.

  • @boolean remove_all_task : specify whether to remove all tasks in the task loop. default false.

addTask(id, interval, callback[, init_paused])

Add a new task to the task loop.

  • @any id : an unique value or object used to identify the task.
  • @number interval : an integer to specify how many milliseconds between each execution of the task.
  • @function callback : called when task interval arrive in each times, id will passed to this function as param.
  • @boolean init_paused : specify whether to pause this task when it added. default false.
addTask('foo', 1000, (task_id) =>
{
	// value of 'task_id' is referenced to 'foo'
});

removeTask([id])

Remove task from the task loop.

  • @any id : if not specified, all tasks will be removed.

pauseTask([id, reset_counter])

Pause a running task.

  • @any id : if not specified, all tasks will be paused.
  • @boolean reset_counter : specify whether to reset task counter to zero. default false.

resumeTask([id, reset_counter])

Resume a paused task.

  • @any id : if not specified, all paused tasks will be resume.
  • @boolean reset_counter : specify whether to reset task counter to zero. default false.

queryTask([id])

Query task status. If task id not found, undefined will be returned.

  • @any id : if not specified, a map iterator object that includes all task will be returned.

executeOnce([id, reset_counter, skip_paused])

Execute the task callback function.

  • @any id : if not specified, all tasks callback will be executed.
  • @boolean reset_counter : specify whether to reset task counter to zero. default false.
  • @boolean skip_paused : specify whether to skip task execution if task is paused. default true.

Note

  • The complete methods and description can be found in module.js
  • More example see test.js and run test using npm test command.