macalino

JavaScript task runner full optional

Purpose

As developer, I want to:

• run any kind of task (sync/async, Promises/callback) mixing parallel and serial
• run tasks with dependencies tree
• listen to tasks events (start, stop)
• have task options like only, skip, timeout
• start/stop/pause/resume/restart the batch
• do all above easily

Inspired by orchestrator, undertaker and jest

Installing

npm i macalino

Quick start

minimal example

const m = require('macalino')
 
const run = async function () {
  const runner = new m.Runner()
 
  runner.add('task#1', async () => { await deelay(200); return 'task 1 done' })
  runner.add('task#1.1', async () => { await deelay(100); return 'task 1.1 done' })
 
  runner.add('task#2', async () => { await deelay(50); return 'task 2 done' })
 
  runner.add('task#3', async () => { await deelay(50); return 'task 3 done' }, { wait: ['task#1', 'task#2'] })
 
  const result = await runner.run()
 
  console.log(result)
}
 
run()

(@todo output)

full optional example

@todo

Features

@todo

• task
  • single
  • series
  • parallel
  • wait option
    • wait for multiple tasks
    • note: circularity is prevented because task can wait only for already existing tasks - it's a tree
  • Promise interface
    • wrapper for callback and events: macalino.promise.event, macalino.promise.callback
    • collect results > results = await runner.run()
• settings
  • settings.running : SERIES | PARALLEL (default PARALLEL)
  • settings.trace > track time (default false)
• events on run
  • on, once, off
  • run:start
  • run:end({result: {outputs, errors}})
  • task:start({id})
  • task:end({id, output, error?})
• play
  • start
  • stop
  • restart
  • pause
  • resume
• skip option
  • in .add
  • override in .run options
• only option
  • in .add
  • override in .run options
• error
  • default behavior: continue
• timeout
  • timeout for each task execution
  • in .add
  • override in .run options
• log
  • each instance of Runner has its own log settings
• draw tree in console
• test coverage 100%

Logging

macalino use peppino as logger, see peppino doc

API

@todo (jsdoc + examples)

---

TODO

• jsdoc
• standard-release, conventional-commit

NEXT

• strategy on error: continue, stop/pause after N errors
• execution limit: running concurrent tasks
• test with 1k tasks, 10k, 100k >>> get stack overflow error
• benchmarks
• experiment: workers as classic thread
  • notes https://www.codewall.co.uk/how-to-implement-worker-threads-in-node-js/
• visual run (http)

---

License

The MIT License (MIT)

Copyright (c) 2020 Simone Sanfratello

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.