doomi-helper/utilities/logutility.js

Doomisoft NodeJs Common Utilities

/**
 * Log4Js封装
 */
var log4js = require('log4js')
var path = require('path')
var fs = require('fs')
class LogUtility{
    constructor(){
        let config = process.env.CONFIGFILE || 'configuration.json';
        let configfile = path.join(process.cwd(), config);
        if (!fs.existsSync(configfile)) throw Error('missing configuration file')
        ////根据配置在configuration.json文件中的配置
        ////初始化Log4Js
        this.config = require(configfile);
        if( this.config.logsetting){
            log4js.configure( this.config.logsetting);
        }        
    }
    /**
     * 返回日志的具体记录器
     * @param {*} category 
     */
    getLogger(category){
        return log4js.getLogger(category);
    }
    /**
     * 单例 
     */
    static getInstance(){
        if (!LogUtility.instance) LogUtility.instance = new LogUtility();
        return LogUtility.instance;
    }
}
exports = module.exports = LogUtility;