im.doctor/src/server/models/base.model.js

/**
 * 模型基类。
 *
 * 模型基于异步模型，提供事件抽象。
 *
 * author: Sand
 * since: 2016.11.20
 */
"use strict";

let EventEmitter = require('events').EventEmitter;

class BaseModel{
    constructor() {
        this._eventEmitter = new EventEmitter();
    }

    get eventEmitter(){
        return this._eventEmitter;
    }

    on(event, handler){
        this._eventEmitter.on(event, handler);
    }
}

module.exports = BaseModel;