A Node.js toolkit for Microservice architectures

Seneca Pino Adapter

A log adapter for the Seneca microservice toolkit that enables you to output your logs to Pino. The code in this project follows the Seneca custom logger example.

https://github.com/senecajs/seneca/blob/master/docs/examples/custom-logger.js

Why?

I have been working with Seneca for a short period of time and while I found the toolkit very useful though I was very frustrated by the lack of ability to manage and control my log output. I found a few examples that enabled external loggers such as Pino and I am hopeful this adapter along with other Pino add-ons will satisfy my requirements.

Pino - Super Fast, All Natural JSON Logger

Pino claims to be an extremely fast Node.js logger, inspired by Bunyan. View additional details at the following url.

https://github.com/pinojs/pino

Install

$ npm install --save seneca-pino-adapter

Usage

Configure Using an Existing Pino Logger Instance

This option will allow you complete control over creating a pino logger instance.

// Seneca support.
const Seneca = require('seneca')

// Pino Support.
const Pino = require('pino')

// Load the adapter.
const PinoLogAdapter = require('seneca-pino-adapter')

// Create a pino logger instance.
const logger = Pino({level: 'info'})

// Initialize the Seneca toolkit with the PinoLogAdapter and a Pino instance.
const seneca = Seneca({
  internal: {
    logger: new PinoLogAdapter({
      logger: logger
    })
  }
})

// Log output via Seneca.
seneca.log.debug('This is a debug log statement!')
seneca.log.info('This is an info log statement!')
seneca.log.error('This is an error log statement!')
seneca.log.warn('This is a warn log statement!')
seneca.log.fatal('This is a fatal log statement!')

Configure Using a Pino Logger Configuration

// Seneca support.
const Seneca = require('seneca')

// Load the adapter.
const PinoLogAdapter = require('seneca-pino-adapter')

// Create a pino logger instance using configuration.
const config = {level: 'info'}

// Initialize the Seneca toolkit with the PinoLogAdapter and a Pino configuration object.
const seneca = Seneca({
  internal: {
    logger: new PinoLogAdapter({
      config: {
        level: 'info'
      }
    })
  }
})

// Log output via Seneca.
seneca.log.debug('This is a debug log statement!')
seneca.log.info('This is an info log statement!')
seneca.log.error('This is an error log statement!')
seneca.log.warn('This is a warn log statement!')
seneca.log.fatal('This is a fatal log statement!')

or

// Initialize the Seneca toolkit with the PinoLogAdapter and a Pino configuration object and a output stream.
const seneca = Seneca({
  internal: {
    logger: new PinoLogAdapter({
      config: {
        level: 'info'
      },
      stream: output_stream
    })
  }
})

// Log output via Seneca.
seneca.log.debug('This is a debug log statement!')
seneca.log.info('This is an info log statement!')
seneca.log.error('This is an error log statement!')
seneca.log.warn('This is a warn log statement!')
seneca.log.fatal('This is a fatal log statement!')

Caveats

• Custom log levels are not supported at the current time.

Inspired by Seneca Pino Logger

I tried using the Seneca Pino Logger in an attempt to have Seneca logging that was fast, configurable levels, easy filtering of content at a detailed level, etc. I found that at this time all of the features I needed were not supported so I submitted a pull request. After studying the issues a bit I was inspired to create a new Pino adapter that could be utilized right now. I took a slightly different approach than the original project so I am not sure if my changes are compatible. Possibly if the approach in this project is useful then the code can be merged back at some point. In the mean time I am publishing this project to NPM so it can be easily accessed.

For details on the Seneca plugin go here:

https://github.com/senecajs/seneca-pino-logger