ECS appender for log4js

This package contains an appender for log4js and a helper for formatting ecs.

Install

yarn add @techteamer/ecs-plugin

Usage

/* Import MJS */
import { ecs, Formatter } from '@techteamer/ecs-plugin'

/* Import CJS */
const ecs = require("@techteamer/ecs-plugin").ecs
const Formatter = require("@techteamer/ecs-plugin").Formatter

// appender (logger.js)
  log4js.configure({
    appenders: {
      custom: {
        type: ecs,
        customConfig: {
          display: 'json'
        }
      }
    },
    categories: {
      default: { appenders: ['custom'], level: 'debug' }
    }
  })

// Formatter
  ...
  const someServiceFormatter = new Formatter('', { service: 'Some service' })
  ...
  const someServiceMethodFormatter: Formatter = this.someServiceFormatter.getClone()
  ...
  logger.info(
    someServiceMethodFormatter
      .addLabel({ method: 'testMethod' })
      .addTag('unit test')
      .appendMessage('call test method')
      .format()
  )