grunt-closure-dicontainer

Dependency Injection Container for Google Closure Library

• concise api (resolve A as B with C by D)
• automatic types registration
• resolving based on strong types parsed from annotations
• run-time configuration
• advanced mode compilation friendly

Getting Started

This plugin requires Grunt ~0.4.1

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-closure-dicontainer --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-closure-dicontainer');

The "closure_dicontainer" task

Overview

In your project's Gruntfile, add a section named closure_dicontainer to the data object passed into grunt.initConfig().

grunt.initConfig({
  closure_dicontainer: {
    app: {
      options: {
        // Name for generated DI container class.
        // goog.require('app.DiContainer');
        name: 'app.DiContainer',
 
        // What should be resolved.
        // new app.DiContainer().resolveApp()
        resolve: ['App'],
 
        // Prefix for deps.js.
        prefix: '../../../../'
      },
      files: {
        'client/app/build/dicontainer.js': 'client/deps.js'
      }
    }
  }
})

Options

options.name

Type: String Default value: 'app.DiContainer'

Generated DI container name.

options.resolve

Type: Array.<string> Default value: ['App']

Array of types to be resolved.

options.prefix

Type: String Default value: '../../../../'

Prefix for deps.js processing.

Usage Example

How to use DI container in your app with various resolving configurations.

###*
  @fileoverview App main method.
###
 
goog.provide 'app.main'
 
goog.require 'app.DiContainer'
 
app.main = ->
  container = new app.DiContainer
  
  container.configure
    resolve: App
    with: element: document.body
  ,
    resolve: este.storage.Storage
    as: este.storage.Local
  ,
    resolve: foo.ui.Lightbox
    by: (lightbox) ->
      lightbox.setSomething()
  ,
    resolve: foo.IFoo
    by: ->
      new foo.Foo
 
  app = container.resolveApp()
  app.start()
 
goog.exportSymbol 'app.main', app.main

Add grunt-closure-dicontainer task after deps.js generation task.

Container Configuration

There is a pattern: Resolve A as B with C by D.

A is type to be resolved. B is optional type to be returned. C is optional object for run-time configuration, where key is argument name and value is runtime value. D is optional factory method.

Available in Este soon. Stay tuned.

More About DI

• kozmic.net/2012/10/23/ioc-container-solves-a-problem-you-might-not-have-but-its-a-nice-problem-to-have
• ayende.com/blog/2887/dependency-injection-doesnt-cut-it-anymore
• ayende.com/blog/4372/rejecting-dependency-injection-inversion
• Dependency Injection in .NET

Release History

• 2014-01-01   v0.4.0   Add interface resolving.
• 2013-12-22   v0.3.0   Add resolving rules rule.as and rule.by.
• 2013-12-17   v0.2.2   Work in progress, not yet officially released. (Pre-release announcement)