Nodejs Log Management Log4js

Briefly:

Logging Configuration Nodejs-log4js Log output

Reference: HTTP://CNODEJS.ORG/TOPIC/521EE22ABEE8D3CB12FC1F02

Https://github.com/nomiddlename/log4js-node/wiki/Date%20rolling%20file%20appender

Steps:

1. Go to the Express project root path and download the LOG4JS library file

[Plain]View Plaincopy

1. NPR Install LOG4JS

2. Configuring the Log4js File

Logger.js

[JavaScript]View Plaincopy

2. /**  
4.  * log4js  Log output configuration file  
6.  *  @type  {exports}  
8.  */   
10. var  log4js = require (
14. //Logger Configure   
16. Log4js.configure ({
18. Appenders: [
20.         { type:  ' console '  }, {  
22.             type: < Span class= "string" style= "margin:0px; padding:0px; border:0px; Color:blue; Background-color:inherit "> ' datefile ' ,&NBSP;&NBSP;
24.             filename:   ,  
26.             pattern:   ,  
28.             maxlogsize:  1024,  
30.              Alwaysincludepattern: false ,&NBSP;&NBSP;
32.             backups:  4,  
34.             category:   &NBSP;&NBSP;
36. }
38. ],
40.     replaceconsole: true &NBSP;&NBSP;
42. });
46. Module.exports = Log4js.getlogger (' logger ');

Modular Declaration of the Logger

After you start the project, a log file is generated immediately under the Logs folder.

At the beginning of the document, the Datefile file updates the file in the daily Midnight, and the previous day's file is automatically appended with the end of the date format.

eg

Modify Windows Time

Before the midnight of the day

The logs folder is then generated

Nodejs Log Management Log4js