Nodejs Log Management Log4js

2 Commonly used configurations:

1. Backing up a number of files by file size Shard

varLOG4JS = require (' Log4js ')); Log4js.configure ({"Appenders" : [        {' Type ': ' Console '},        {            ' type ': ' File ',            "FileName": "Logs/app.log",            "Maxlogsize": 204800,            "Backups": 10,            "category": "App"        }    ],    "Replaceconsole":true,    "Levels" : {        "App": "All"    }});varLogger = Log4js.getlogger (' app '); App.use (Log4js.connectlogger (logger, {format:': Remote-addr:method:url:status:response-time MS '})

2. Shard by date, this shard mode cannot be limited by size and number of backups

var log4js = require (' Log4js '); Log4js.configure ({    appenders: [        ' console '},        {             ' datefile '            , ' Logs/app ',            '-yyyy-mm-dd.log ',            True  ,            ' app '        }    ],    true}); var logger = Log4js.getlogger (' app ': Remote-addr:method:url:status:response-time MS '});

Multi-type multi-application file Shard configuration:

log4js.configure ({"Appenders" : [        {' Type ': ' Console '},        {            ' type ': ' File ',            "FileName": "Logs/app1.log",            "Maxlogsize": 204800,            "Backups": 10,            "category": "App1"        },        {            ' type ': ' File ',            "FileName": "Logs/app2.log",            "Maxlogsize": 204800,            "Backups": 10,            "category": "App2"        },        {            ' type ': ' File ',            "FileName": "Logs/app3.log",            "Maxlogsize": 204800,            "Backups": 10,            "category": "App3"        }    ],    "Replaceconsole":true,    "Levels" : {        "App1": "All",//level can be set All,auto,info,warn,error"APP2": "All",        "APP3": "All"    }});

Modular:

1. Define the configuration file Log4js.json

{    "appenders" : [        {"type": "Console"},        {            "type": "Datefile",            "filename": "Logs/app",            "pattern": "-yyyy-mm-dd.log",            true,             "category": "App"        }    ],    true,    "levels" : {        "app": "All"    }}

2. Core Model Ms.js

/**/var log4js = require ("log4js" = Require ("... /log4js.json "); Log4js.configure (this = Log4js.getlogger (" app ");

3. How to use

var ms = require ("MS"), Ms.logger.info ("info test"), Ms.logger.warn ("Warn Test"); Ms.logger.error ("error TEST");

Nodejs Log Management Log4js