Esther NPM | npm.io

Esther

An opinionated winston logger wrapper.
Requires nodejs 10.11 > as it utilises grpc lib

Usage

The recommended way to use esther is setup the logger with logger.init function. This instantiates a new instance of winston with your own settings under the hood.

const logger = require('esther');

// Initialise logger
logger.init({
  useFileTransport: true,
  logDirectory: path.join(__dirname, '..', 'logs'),
});

You may also use esther via the default logger exposed by require('esther') This works with ES6 syntax such as import.

init Options are identical with winston configs.

Name	Default	Description
`level`	`'info'`	Log only if `verbose` is less than or equal to this level
`levels`	`esther.config.levels`	Levels representing log priorities
`colors`	`esther.config.colors`	colors representing log priorities
`disableStackTrace`	`false`	Disable logging of stack trace for `isHandledError`. I.E `logger.error(new Error(), { isHandledError: true });` Example
`transports`	`[]` (Console Transport)	Set of logging targets for logs
`useFileTransport`	`false`	If true, will generate and write logs to system
`logDirectory`	`Root directory of project` (__dirname)	Logs directory to be written to
`useStackDriver`	`false`	If true, logger transport will utilise google's `StackDriver`.
`stackDriverOpt`	`{ serviceName: 'Auth service', ver: '1.0,0' }`	Adds labels to each logging

Refer to Stackdriver docs on how to setup your google service account. Alternatively, if you're deploying your app with kubernetes on GKE, each pod is configured with the default service account

Disable Stack Trace

import { BadRequest } from 'horeb';
import path from 'path';
import logger from 'esther';

logger.init({
  disableStackTrace: true,
  useFileTransport: true,
  logDirectory: path.join(__dirname, 'logs'),
});
const err = new BadRequest('invalid parameters');
logger.error(err, { isHandledError: true });
// Prints out message only