Error Logging in Node - Revision history

AliIybar at 13:01, 8 November 2018

2018-11-08T13:01:12Z

AliIybar at 12:18, 8 November 2018

2018-11-08T12:18:42Z

AliIybar at 12:02, 8 November 2018

2018-11-08T12:02:04Z

AliIybar: Created page with "Category:Node.js == Installation == npm i winston == Setup == const winston = require('winston'); ... winston.add(winston.transports.File, {filename:'logfile.log'}) =..."

2018-11-08T12:00:03Z

Created page with "Category:Node.js == Installation == npm i winston == Setup == const winston = require('winston'); ... winston.add(winston.transports.File, {filename:'logfile.log'}) =..."

New page

[[Category:Node.js]]

== Installation ==
npm i winston
== Setup ==
const winston = require('winston');
...
winston.add(winston.transports.File, {filename:'logfile.log'})
== Usage ==
winston.log('error', err.message);
or
winston.error(err.message, error);
// error
// warn
// info
// verbose
// debug
// silly
== Logging to MongoDb ==
npm i winston-mongodb@3.0.0

require('winston-mongodb');

winston.add(winston.transports.MongoDB, { db: 'mongodb://localhost/somedb' });
To set only the errors to go to db
winston.add(winston.transports.MongoDB, { db: 'mongodb://localhost/somedb', level:'error' });
if we give the parameter as info error, warn and info will be logged.

@@ Line 39: / Line 39: @@
   });
 == Handling Exceptions ==
   winston.handleExceptions(new winston.transports.File({filename:'uncaughtExceptions.log'}));

← Older revision		Revision as of 12:18, 8 November 2018
Line 28:		Line 28:
	winston.add(winston.transports.MongoDB, { db: 'mongodb://localhost/somedb', level:'error' });		winston.add(winston.transports.MongoDB, { db: 'mongodb://localhost/somedb', level:'error' });
	if we give the parameter as info error, warn and info will be logged.		if we give the parameter as info error, warn and info will be logged.
		+	== Uncaught Exception ==
		+	in index.js
		+	process.on('uncaughtException', (ex) => {
		+	winston.error(ex.message, ex);
		+	});
		+
		+	== Unhandled Promise Rejections ==
		+	process.on('uncaughtRejection', (ex) => {
		+	winston.error(ex.message, ex);
		+	});
		+	== Handling Exceptions ==
		+	winston.handleExceptions(new winston.transports.File({filename:'uncaughtExceptions.log'}));

← Older revision		Revision as of 12:02, 8 November 2018
Line 1:		Line 1:
	[[Category:Node.js]]		[[Category:Node.js]]
		+	[[Category:MongoDb]]
		+

	== Installation ==		== Installation ==