prole

Simple Worker wrapper to create and off load tasks.

How It Works

Create a worker script, like a normal Worker would accept, but you make add Prole hooks to it first. Include ./lib/worker-helper.js, or require it via CommonJS in the worker script and define your task.

/* included ./lib/worker-helper.js */

createTask(self, "square", function (x) {
  return x * x;
});

The tasks must only accept one argument, and to communicate back to the main thread, return a value, or a promise.

On the main thread, create a Prole instance, pointing to your worker. The prole performTask method returns a promise that resolves to the return or resolve value of the task in the worker, or rejects if an error is thrown, the task returns an error instance, or a rejected promise is returned.

var prole = new Prole("./myworker.js");
prole.performTask("square", 5).then(function (value) {
  // value === 25
});

Installation

$ npm install prole

Build

You can build a browserified version via gulp, created in the ./build directory, or just use this in a script tag.

API

new Prole(url, { Worker, Promise });

Create a new Prole instance. Must specify a valid worker URL. May optionally pass in your own optional Worker and Promise constructors (Promise constructor must support constructor, and static methods all, resolve and reject.

{Promise} prole.performTask(taskName, value)

Executes task taskName in the worker script defined in the constructor. May pass in an argument as value, which will be the first argument passed into the task. Returns a promise that resolves to the return value of the task, or the resolution of a resolved promise, or rejects if an error is thrown in the task, a rejected promise is returned, or an error instance is returned.

Testing

Open ./test/index.html

License

MPL 2.0 License, copyright (c) 2015 Jordan Santell