A winston-wrapper to log in a debug-like manner including namespaces
Loggerhythm exports a Logger-class, whose instances have different log-functions for different log-levels. the avaliable loglevels are:
- error
- warn
- info
- verbose
error logs to stderr
, everything else logs to stdout
!
const Logger = require('loggerhythm').Logger;
// import {Logger} from 'loggerhythm'; // for TypeScript
const logger = new Logger('readme-namespace');
// alias: logger = logger.createLogger('readme-namespace');
logger.info('foo');
The output would look like this (the different log-leves use different colors):
2016-08-30T14:06:33.751Z - info: [readme-namespace] foo
2016-08-30T14:06:33.752Z - warn: [readme-namespace] bar
The Logger-Class has static methods, that can be used to globally set loggerhythm-config and register global log-hooks:
const Logger = require('loggerhythm').Logger;
// import {Logger, LogLevel} from 'loggerhythm'; // for TypeScript
// get informed about all Logs everywhere
const subscription = Logger.subscribe((logLevel, namespace, message, ...logObjects) => {
// do stuff
});
// do stuff
// unsubscribe
subscription.dispose();
The Instances of the Logger-class have a log-method for every loglevel and a subscribe-method to get informed about logs of that instance
const Logger = require('loggerhythm').Logger;
// import {Logger} from 'loggerhythm'; // for TypeScript
const logger = Logger.createLogger('readme-namespace');
// get informed about all the logs of that instance
const subscription = Logger.subscribe((logLevel, namespace, message, ...logObjects) => {
// namespace will always be 'readme-namespace' here
// do stuff
});
logger.error('error-log', new Error('hello'));
logger.warn('warning-log');
logger.info('have some info', {v1: 1, v2: 2, test: ['some', 'test', 'array']});
logger.verbose('some', 'more detailed', 'info');
// this loggers namespace will be 'readme-namespace:child-logger-lamespace'
const logger2 = logger.createChildLogger('child-logger-lamespace');
// do stuff
// unsubscribe
subscription.dispose();