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Author message:

no more work on this module

izidi

A very light and simple (easy) Dependency Injection.

Izidi is a simple Helper to manage components and dependency injection.

Basic Usage

You have first to require the izidi module var izidi = require("izidi");

You have next some convenient methods to register components to the container :

var obj = new MyObject();
izidi.container.register("obj1", obj);

And method to access to the components by name :

var c = izidi.container.get("obj1");

Defining a reusable component

You can next create component in their own JS file. In each component file, you have to :

• require the izidi component
• create a factory by invoking the buildFactory of the izidi FactoryBuilder object
• surchage the createAndRegister method and return the usable component
• export your factory

Here is a code sample :

var factory = izidi.factoryBuilder.buildFactory();

factory.createAndRegister = function( depMap ){
  izidi.container.factoryArgsChecks( "ComponentTwo", depMap, ['logger', 'info', 'message'] );
  var component = new Component( depMap.logger, depMap.info, depMap.message );
  return component;
};


module.exports = factory;

You can notice that the container propose a factoryArgsChecks to verify injected parameters.

Loading components

You can define an array with component descriptions. Each description is a JS object with :

• a name property : name od the component in the container
• a module property : relative path to the corresponding JS module file
• a dependencies property : array oth component names that have to be injected in your component

Example :

var componentDefs = [
  {
    name: "c1",
    module: "./samples/factories/componentOne.js",
    dependencies: [
      "logger",
      "info"
    ]
  },
  {
    name: "c2",
    module: "./samples/factories/componentTwo.js",
    dependencies: [
      "logger",
      "info",
      "message"
    ]
  }
];

Loading and using components

And then load all defined components :

izidi.container.loadComponents( componentDefs );

So, you can use them in you main code :

var c1 = izidi.container.get("c1");
c1.hello();


var c2 = izidi.container.get("c2");
c2.hello();

See file id the samples/ directory and subdirectories for complete sample.