standalone

description

Creates an isolated thread / process in JavaScript (Node.js and modern browsers).

API at a glance

master.js

standalone("worker.js", function(obj) {

  obj.getXXXByYYY("YYY", function(err, XXX) {
    console.log(XXX); // "XXX by YYY"
  });
});

worker.js

var obj = {
  getXXXByYYY : function(YYY) {
    return "XXX" + " by " + YYY;
  }
};

standalone(obj);

In master.js, we can use "getXXXByYYY" asynchronously, while the originally defined API is synchronous.

In Node.js, standalone spawns a child process.

In browsers, standalone creates a WebWorker instance.

Installation

$ npm install standalone

In browsers,

<script type="text/javascript" src="/path/to/standalone.js"></script>

Then the variable "standalone" is set to global.

In worker.js (when running in Web Worker),

importScripts('/path/to/standalone.js');

can import the variable.

In Node.js,

var standalone = require('standalone');

API documentation

standalone(filename, callback, debugMode)

Creates a worker from filename. callback is called after the target object is created.

callback is passed one argument. The target object which has asynchronous APIs.

master.js

var master = standalone("worker.js", function(obj) {
  obj.add(123, 456, function(e, v) {
    // e: null if no error, error object if error occurred.
    // v: result
  });
})

if debugMode is true, verbose logs appear in console.

Returns master object.

standalone(obj, debugMode)

Set an object obj to create asynchronous APIs from.

worker.js

var worker = standalone({
  add : function(a, b) { return a + b },
  sub : function(a, b) { return a - b }
});

if debugMode is true, verbose logs appear in console.

Returns worker object.

master.closeWorker(callback)

Closes the worker instance.

callback is called after worker.onClose is executed.

master.closeWorker(function(e, msg) {
  // e: null if no error, error object if error occurred.
  // v: the value worker.onClose() returned.
});

worker.onClose

Function to be called before closing.

worker.onClose = function() {
  db.save();
  return 1;
};

The returned value is passed to the callback function in master.closeWorker(callback)

LICENSE

(The MIT License)

Copyright (c) 2012 SHIN Suzuki [email protected]

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.