@eggjs/core

A core plugin framework based on @eggjs/koa. Support Commonjs and ESM both by tshy.

Don't use it directly, see egg.

Usage

Directory structure

├── package.json
├── app.ts (optional)
├── agent.ts (optional)
├── app
|   ├── router.ts
│   ├── controller
│   │   └── home.ts
|   ├── extend (optional)
│   |   ├── helper.ts (optional)
│   |   ├── filter.ts (optional)
│   |   ├── request.ts (optional)
│   |   ├── response.ts (optional)
│   |   ├── context.ts (optional)
│   |   ├── application.ts (optional)
│   |   └── agent.ts (optional)
│   ├── service (optional)
│   ├── middleware (optional)
│   │   └── response_time.ts
│   └── view (optional)
|       ├── layout.html
│       └── home.html
├── config
|   ├── config.default.ts
│   ├── config.prod.ts
|   ├── config.test.ts (optional)
|   ├── config.local.ts (optional)
|   ├── config.unittest.ts (optional)
│   └── plugin.ts

Then you can start with code below

import { EggCore as Application } from '@eggjs/core';

const app = new Application({
  baseDir: '/path/to/app',
});
app.ready(() => {
  app.listen(3000);
});

EggLoader

EggLoader can easily load files or directories in your egg project. In addition, you can customize the loader with low level APIs.

constructor

• {String} baseDir - current directory of application
• {Object} app - instance of egg application
• {Object} plugins - merge plugins for test
• {Logger} logger - logger instance，default is console

High Level APIs

async loadPlugin

Load config/plugin.ts

async loadConfig

Load config/config.ts and config/{serverEnv}.ts

If process.env.EGG_APP_CONFIG is exists, then it will be parse and override config.

async loadController

Load app/controller

async loadMiddleware

Load app/middleware

async loadApplicationExtend

Load app/extend/application.ts

async loadContextExtend

Load app/extend/context.ts

async loadRequestExtend

Load app/extend/request.ts

async loadResponseExtend

Load app/extend/response.ts

async loadHelperExtend

Load app/extend/helper.ts

async loadCustomApp

Load app.ts, if app.ts export boot class, then trigger configDidLoad

async loadCustomAgent

Load agent.ts, if agent.ts export boot class, then trigger configDidLoad

async loadService

Load app/service

Low Level APIs

getServerEnv()

Retrieve application environment variable values via serverEnv. You can access directly by calling this.serverEnv after instantiation.

getEggPaths()

To get directories of the frameworks. A new framework is created by extending egg, then you can use this function to get all frameworks.

getLoadUnits()

A loadUnit is a directory that can be loaded by EggLoader, cause it has the same structure.

This function will get add loadUnits follow the order:

1. plugin
2. framework
3. app

loadUnit has a path and a type. Type must be one of those values: app, framework, plugin.

{
  path: 'path/to/application',
  type: 'app'
}

getAppname()

To get application name from package.json

appInfo

Get the infomation of the application

• pkg: package.json
• name: the application name from package.json
• baseDir: current directory of application
• env: equals to serverEnv
• HOME: home directory of the OS
• root: baseDir when local and unittest, HOME when other environment

async loadFile(filepath)

To load a single file. Note: The file must export as a function.

async loadToApp(directory, property, LoaderOptions)

To load files from directory in the application.

Invoke this.loadToApp('$baseDir/app/controller', 'controller'), then you can use it by app.controller.

async loadToContext(directory, property, LoaderOptions)

To load files from directory, and it will be bound the context.

// define service in app/service/query.ts
export default class Query {
  constructor(ctx: Context) {
    super(ctx);
    // get the ctx
  }

  async get() {}
}

// use the service in app/controller/home.ts
export default async (ctx: Context) => {
  ctx.body = await ctx.service.query.get();
};

async loadExtend(name, target)

Loader app/extend/xx.ts to target, For example,

await this.loadExtend('application', app);

LoaderOptions

| Param | Type | Description | | ----------- | ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------- | | directory | String/Array | directories to be loaded | | target | Object | attach the target object from loaded files | | match | String/Array | match the files when load, default to **/*.js(if process.env.EGG*TYPESCRIPT was true, default to [ '\*\*/\_.(js | ts)', '!\*_/_.d.ts' ]) | | ignore | String/Array | ignore the files when load | | initializer | Function | custom file exports, receive two parameters, first is the inject object(if not js file, will be content buffer), second is an options object that contain path | | caseStyle | String/Function | set property's case when converting a filepath to property list. | | override | Boolean | determine whether override the property when get the same name | | call | Boolean | determine whether invoke when exports is function | | inject | Object | an object that be the argument when invoke the function | | filter | Function | a function that filter the exports which can be loaded |

Timing

EggCore record boot progress with Timing, include:

• Process start time
• Script start time(node don't implement an interface like process.uptime to record the script start running time, framework can implement a prestart file used with node --require options to set process.scriptTime)
• application start or agent start time
• Load duration
• require duration

start

Start record a item. If the item exits, end the old one and start a new one.

• {String} name - record item name
• {Number} [start] - record item start time, default is Date.now()

end

End a item.

• {String} name - end item name

toJSON

Generate all record items to json

• {String} name - record item name
• {Number} start - item start time
• {Number} end - item end time
• {Number} duration - item duration
• {Number} pid - pid
• {Number} index - item index

Questions & Suggestions

Please open an issue here.

License

MIT

Contributors

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