instance-locator v0.0.2

The library helps to build your own module system. Barely it resolves Dependency Inversion Principle of SOLID. It is used as barebone for an application that simplify logic integration and its usage.

Be free and ask me questions personally on Gitter

Basic usage

Register basic models for future instance.

const { ContainerLocator } = require('instance-licator')

const config = {
  test: 'configTest'
}

class CoreModel {
  constructor(config) {
    this.config = config
  }
  test() { return 'coreTest' }
}

class DbModel {
  constructor(core) {
    this.core = core
  }

  test() {
    return 'dbTest'
  }

}

Define symbols for instances

const TYPES = {
  config: Symbol('config'),
  core: Symbol('core'),
  db: Symbol('db')
}

Create locator and register models

const locator = new ContainerLocator()
locator
  .registerValue(TYPES.config, config)
  .register(TYPES.core, CoreModel, [ TYPES.config ])
  .register(TYPES.db, DbModel, [TYPES.core])

Initiate models by the locator, use your logic.

const instance = locator.get(TYPES.db)
const core = locator.get(TYPES.core)

Use your logic

// Outputs dbTest.
console.log(instance.test(), 'dbTest')

// Outputs coreTest.
console.log(instance.core.test())

// Outputs configTest.
console.log(instance.core.config.test)

// Same instances.
console.log('Same instances - ', core == instance.core)

Also check the basic example and tests.