egg-aop

egg-aop

Add DI, AOP support for eggjs.

DI

Quick overview

import { Service, Context } from 'egg';
import { context, lazyInject } from 'egg-aop';

@context() // or @application()
export class TestService extends Service {
  get() {
    /* code */
  }
}

export class Controller {
  @lazyInject()
  private testService: TestService;
  
  demo() {
    this.testService.get();
  }
}

API

decoratros

• @context(keyType?: any)
• @application(keyType?: any)
• @inject(keyType?: any)
• @lazyInject(keyType?: any)

functions

• getInstance<T = any>(clsType: any, app: any, ctx: any): T
• setCreateInstanceHook(func: CreateInstanceHookFunction)

typeLoader

AOP

Quick overview

function logging(type: string) {
  return aspect({
    // before method running
    before: (context) => { /* log code */ },
    // after method running
    after: (context) => { /* log code */ },
    // when method throw error
    onError: (context) => { /* log code */ },
  })
}

class DemoService {
  @logging('create')
  createData() {
    /* code */
  }
}

/* FunctionContext type define */
export interface FunctionContext<T = any> {
  readonly inst: T;
  readonly functionName: string;
  args: any[];
  ret: any;
  err: Error;
}

API

functions

• aspect<T = any>(point: AspectPoint<T> = {})