NODEJS(14)Platform - log4js
1. log4js Introduction
> npm info log4js version
npmhttpGEThttps://registry.npmjs.org/log4js npmhttp200https://registry.npmjs.org/log4js 0.6.14
> npm info log4js
Get the right official website
https://github.com/nomiddlename/log4js-node
2. Use and Configure
First of all, add the dependencies in package.json
{
"name": "buglist",
"version": "0.0.1",
"private": true,
"dependencies": {
"express": "4.2.0",
"body-parser": "1.2.0",
"generic-pool": "2.0.4",
"mongodb": "1.4.5",
"log4js": "0.6.14"
}
}
Make sure to install it
> npm install
Prepare the configuration file in log4js.json
{
"appenders": [
{
"type": "console",
"layout": {
"type": "pattern",
"pattern": "[%d{yyyy-MM-dd hh:mm:ss,SSS}] [%-5p] [%M] %m"
},
"category": ["root"]
},
{
"type": "file",
"filename": "buglist-error.log",
"maxLogSize": 10485760,
"backups": 10,
"layout": {
"type": "pattern",
"pattern": "[%d{yyyy-MM-dd hh:mm:ss,SSS}] [%-5p] [%M] %m"
},
"category": ["root"]
},
{
"type": "file",
"absolute": true,
"filename": "/var/log/nodejs/buglist/buglist-error.log",
"maxLogSize": 20480,
"backups": 10,
"layout": {
"type": "pattern",
"pattern": "[%d{yyyy-MM-dd hh:mm:ss,SSS}] [%-5p] [%M] %m"
},
"category": "root"
}
],
"levels": {
"root": "DEBUG"
}
}
Start and use it in app.js.
var log4js = require('log4js’);
log4js.configure(__dirname +'/config/log/log4js.json’);
var logger = log4js.getLogger("root”);
logger.debug("Running nodeJS on port" + app.get("port") + " !”);
Then we can use logger when we want to use it.
3. Integrate with Express.js
Easy to Integrate with Express.js, just use it.
app.use(log4js.connectLogger(logger));
References:
http://blog.fens.me/nodejs-log4js/
https://github.com/nomiddlename/log4js-node
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