AppContext Module

This module represents a centralized context, which consists of a set of name to object/events/services bindings.

The AppContext provides:

• The ability providing configuration information to the application. It is read-write at run time.
• The ability to publish events / services.
• The ability to resolve services names to registered events.

A Context instance is not guaranteed to be synchronized against concurrent access by multiple methods async.

Install

NPM

npm i app-context-js

Usage

CommonJS

var AppContext = require('app-context-js')

ES6 / ES2015 module

import AppContext from 'app-context-js'

Features

Object bindings global

AppContext.addAttr('name-app', 'Fumoffu-App');
AppContext.addAttr('version', 'v1.0.0');
AppContext.addAttr('env', { properties: 'some properties'});

Publish services

AppContext.Services.publish("User_persistence", { api: "some functions"});
AppContext.Services.publish(
    'Task_persistence', 
    { api: "some functions"}, 
    { info: 'any API, for save tasks'}
);

var userPersistence = AppContext.Services.getService('User_persistence');
var { userPersistence, Taskpersistence} = AppContext.Services.getServices(
    ['Task_persistence', 'User_persistence']);

Register/Emit Events

Events Simple

import AppContext from 'app-context-js'

function registerUser() {
    // any code
}

AppContext.onEvent('addUser', registerUser);

// other file.js
import AppContext from 'app-context-js'

AppContext.emitEvent('addUser');

Events with properties

import AppContext from 'app-context-js'

function registerUser(properties) {
    // any code
}

AppContext.onEvent('addUser', registerUser);

// other file.js
import AppContext from 'app-context-js'

var User = {
    name: 'John',
    lastnames: 'Doe'
}

AppContext.emitEvent('addUser', User);

Events with properties and services

import AppContext from 'app-context-js'

function registerUser(service, properties) {
    // any code
}

function registerTask(services, properties) {
    // any code
}

AppContext.onEvent('addUser', registerUser);
AppContext.onEvent('addTask', registerTask);

// other file.js
import AppContext from 'app-context-js'

var User = {
    name: 'Maxfaider',
    topic: ['programing', 'chess', 'novels graphic']
}

var task = {
    name: "do nothing",
    owner: User
}

AppContext.emitEvent('addUser', User, 'User_persistence');
AppContext.emitEvent('addTask', task, 'Task_persistence', 'User_persistence');