kafkajs/src/loggers/console.js

A modern Apache Kafka client for node.js

const { LEVELS: logLevel } = require('./index')

module.exports = () => ({ namespace, level, label, log }) => {
  const prefix = namespace ? `[${namespace}] ` : ''
  const message = JSON.stringify(
    Object.assign({ level: label }, log, {
      message: `${prefix}${log.message}`,
    })
  )

  switch (level) {
    case logLevel.INFO:
      return console.info(message)
    case logLevel.ERROR:
      return console.error(message)
    case logLevel.WARN:
      return console.warn(message)
    case logLevel.DEBUG:
      return console.log(message)
  }
}