An implementation of Web workers pool to facilitate task distribution and pool maintenance. the source code is written in TypeScript.
Demo : http://ezelia.com/wp-content/uploads/labs/WorkerPool/index.html
Reference WorkerPool.js file
<head>
<script src="WorkerPool.js"></script>
</head>To initialize a pool of 4 web workers using worker.js
var wPool = new Ezelia.WorkerPool();You can also initialize an empty pool and create workers later using reset() method
var wPool = new Ezelia.WorkerPool();
wPool.reset(wnb, "worker.js"); wPool.addTask({ n: 10, s:'someString' }, function (resultData) {
Logger.log('task ' + resultData.__taskId + ' result ' + resultData.result); // __taskId is automatically added by WorkerPool.
});- reset(nb, script) : resets the pool, if some workers are still running they'll be killed. nb is the number of workers to initialize and script is the source script to use as worker
- addTask(data, callback) : data is a json object holding the data to pass to the worker this should be a JSON object not a string!, callback(resultData) is called when worker finishes a task.
- clearTasks() : remove all queued tasks
- onTasksDone(callback) : this event is fired when all tasks are done.
There are two things you need to take in consideration to allow WorkerPool to work correctly. 1 - You should allways send a json object as task data, Javascript Web workers API allow sending a string but this will not work with WorkerPool tasks because it need to add a taskId to the data witch help identifying the task result once returned from the worker.
2 - The worker should allways return the result as an object and send back the taskId in __taskId property.
see how worker.js wotks :)
MIT License Copyright(c) 2012 - 2013 Ezelia.com and other contributors Author : Alaa-eddine KADDOURI (alaa.eddine@gmail.com)
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:
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