Appolo-Engine
Appolo is an light web server MVC Framework for Node.js written in Typescript
Appolo architecture follows common patten of MVC and dependency injection which makes it easy to build better performance, flexibility and easy maintenance server side in nodejs.
Features
- Super fast
- MVC Architecture
- Dependency injection
- Routes validation
- Modules system
- Manage easily configurations and environments
- Simple folder structures
- Easy to get started
Installation
npm install @appolo/engine --save
Typescript
appolo
requires TypeScript compiler version > 2.1 and the following settings in tsconfig.json
:
{
"experimentalDecorators": true
}
Quick Start
In your app.js file:
var {createApp} from '@appolo/engine';
createApp().launch();
Directory Structure
Appolo will require all files in the config
and src
folders, but the env
folder will be loaded first. All other folders are optional
|- config
|- env
|- all.ts
|- development.ts
|- production.ts
|- modules
|- all.ts
|- src
|- controllers
|- managers
|- services
|- bootstrap.ts
|- app.ts
Configuration
appolo launch configuration options, all options are optional
key | Description | Type | Default |
---|
paths | folders that will be required and loaded on appolo launch | array | [ 'src'] |
environment | environment file name that will override the settings in environments/all.js | string | `(process.env.NODE_ENV |
usage example:
import {createApp} from '@appolo/engine';
(async ()=>{
let app = await createApp({
paths:[ 'src'],
root : process.cwd()+'/app',
environment : 'testing'
}).launch();
})();
Environments
With environments you can define different configurations depending on the environment type your app is currently running.
It is recommended to have 4 types of environments: development
, testing
, staging
, production
.
After appolo.launch
you can always access the current environment vars via appolo.environment
.
export = {
name:'all',
someVar:'someVar'
}
export = {
name:'develpment',
db:'mongo://development-url'
}
export = {
name:'testing',
db:'mongo://testing-url'
}
If we launch our app.js with NODE_ENV = testing
import {createApp} from '@appolo/engine';
...
let app = await createApp().launch();
var env = appolo.env;
console.log(env.name,env.someVar,env.db)
Dependency Injection System
Appolo has a powerful Dependency Injection system based on appolo-inject.
It enables you to write organised, testable code based on the loose coupling idea.
You can always access the injector via app.injector
.
class decorators
define
- make the object injectablesingleton
- the class will be created only once and the injector will return the same instance every timelazy
- wait for the class to be injected before creating italias
- add alias name to the object (allows injecting multiple objects which share an alias using injectAlias
)aliasFactory
- add alias factory name to the object (allows injecting multiple objects which share an alias using injectAliasFactory
)
methods decorators
initMethod
- The method will be called after all instances were created and all the properties injected.
property decorators
method parameter decorators
injectParam
- inject object by parameter
import {define,singleton,initMethod,inject,IFactory,factory} from '@appolo/inject';
@define()
@singleton()
export class DataRemoteManager {
getData(){ ...}
}
@define()
@singleton()
@factory()
export class DataManager implement IFactory {
@inject() dataRemoteManager:DataRemoteManager
get(){
return this.dataRemoteManager;
}
}
@controller()
export class FooController{
@inject() dataManager:DataManager
constructor() {
this.data = null
}
@initMethod()
initialize(){
this.data = this.dataManager.getData();
}
@get("/data")
getData(){
return this.data;
}
}
You can also use constructor injection or method parameter injection:
import {define,singleton,injectParam,initMethod,inject} from '@appolo/inject';
@define()
@singleton()
export class DataManager {
getData(){ ... }
}
@define()
class FooController{
constructor(@injectParam() dataManager:DataManager) {
this.dataManager = dataManager;
}
@initMethod()
public initialize(){
this.data = this.dataManager.getData();
}
public test(@injectParam() logger:Logger){... }
}
Inherited injections
Inherited injections are supported as well.
Anything you inject on a base class will be available to child classes.
Remember not to use @define
on the parent class.
import {define,singleton,injectParam,initMethod,inject} from '@appolo/inject';
export class BaseManager {
@inject() protected env:any
private getData(){...}
}
@define()
class FooManager extends BaseManager{
@initMethod()
public initialize(){
console.log(this.env.test)
}
}
Event Dispatcher
Appolo has a built-in event dispatcher to enable classes to listen to and fire events.
Event Dispatcher has the following methods:
import {define,singleton,injectParam,initMethod,inject} from '@appolo/inject';
import {EventDispatcher} from '@appolo/events';
@define()
@singleton()
export class FooManager extends EventDispatcher{
public notifyUsers(){
this.fireEvent('someEventName',{someData:'someData'})
}
}
@define()
export class FooController {
@inject() fooManager:FooManager;
@initMethod()
public initialize(){
this.fooManager.on('someEventName',(data)=>{
this.doSomething(data.someData)
},this);
}
doSomething(data){...}
}
Modules
Third party modules can be easily loaded intto appolo inject and used in the inject container.
Each module must call appolo.module
before it can be used by appolo launcher
.
appolo.module
accepts a function as an argument. The last argument to that function must be the next
function: modules are loaded serially, so each module must call the next
function or return a promise
in order to continue the launch process.
Other arguments to the function are object which you wish to inject into the module (these objects must be injected earlier).
By default, each module can inject:
env
- environment object,inject
- injector - to add objects to the injector,
Module example:
import {App} from '@appolo/engine';
import {Injector} from '@appolo/inject';
export = async function(app:App){
await app.module(async function(env:any,inject:Injector){
let myModuleObject = {data:'test'};
await toSomeThing();
inject.addObject('myModuleObject',myModuleObject);
});
}
Now we can inject myModuleObject
to any class:
import {define,singleton,initMethod,inject} from '@appolo/inject';
@define()
export class AuthMiddleware{
@inject('myModuleObject') testObject:any
public doSomeThing() {
return this.testObject.data;
}
}
Logger module example
A logger module example with winston
loggerModule.js file:
import winston = require('winston');
import {App} from '@appolo/engine';
import {Injector} from '@appolo/inject';
export = async function(app:App){
await appolo.module(async function(env:any,inject:Injector){
transports = [];
transports.push(new (winston.transports.Console)({
json: false,
timestamp: true
})
});
let logger = new (winston.Logger)({ transports: transports});
inject.addObject('logger', logger);});
Now we you inject logger anywhere we need it:
import {define,singleton,initMethod,inject} from '@appolo/engine';
@define()
export class DataManager{
@inject() logger:Logger
public initialize(){
this.logger.info("dataManager initialized",{someData:'someData'})
}
}
Bootstrap
Once it launched, appolo will try to find an appolo bootstrap
class and call it's run
method. Only when the bootstrap is finished, the server will start
import {bootstrap,IBootstrap} from '@appolo/engine';
import {define,singleton,injectParam,initMethod,inject} from '@appolo/inject';
@define()
@bootstrap()
export class Bootstrap implements IBootstrap{
@inject() someManager1:SomeManager1
public async run(){
await this.someManager1.doSomeThing();
}
}
Reset
You can reset appolo sever by calling appolo.reset()
. This will clean all environments, config, injector and close the server.
Tests
grunt test
License
The appolo
library is released under the MIT license. So feel free to modify and distribute it as you wish.