Logger for node.js apps used in Yandex.Mediaservices domino frontend. Uses debug in development and process.stdout/stderr in production environment. Supports namespaces.
Post on Medium.com: https://medium.com/@1999/domino-logger-why-we-wrote-another-logger-for-our-node-js-app-ed11a2a8958b
npm install domino-logger --save
'use strict';
const dominoLogger = require('domino-logger');
const moment = require('moment');
// first, create factory for new loggers
// pass your app name to domino-logger function
const loggerFactory = dominoLogger('kinopoisk');
// second, create logger instance
// available options are:
// - emitErrors: emit errors if logger.error is called (true by default)
// - format: custom formatting function for production environment
// invoked with req (http.incomingMessage), namespace, message and extra
// - namespace: next level namespace (log namespace is appname:nextlevel then)
// - extra: some additional object you can use in `format` function
const loggerInstance = loggerFactory({
// for example like this
format(req, namespace, message, extra) {
return moment().format('YYYY-MM-DD HH:mm:ss.SSS') + '\t' +
'pid:' + process.pid + '\t' +
'request_id:' + req.uuid + '\t' +
'yandex_uid:' + req.auth.yandex_uid + '\t' +
namespace + '\t' +
message;
}
}).on('error', ({namespace, message, req}) => {
// handle errors
});