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@nomikos/module-koa-common

v2.0.6

Published

Configura logging, y varios middleware para koa

Readme

@nomikos/module-koa-common

Configura logging, y varios middleware para koa

  • Configura pino logging para apis koa

    • loggerMiddleware. Internamente usa:
      • logRequest: post log de immediato
      • logResponse: post todos los logs acumulados en memoria
    • errorHandlerMiddleware. Internamente usa:
      • errorHandler
  • Maneja y reporta unhandled promise rejection.

    • unhandledRejectionHandler. Internamente usa:
      • rejectionHandler
  • Exporta funciones de logging

    • trace, debug, info, warn, error, fatal
  • Reporta logs en apps que no siguen un flujo down-up sobre un request http.

    • logBegin
    • logEnd

Creación de tracers

tracer-session-id:

  • Se crean en pwa o apis. Es unico por request
  • Se mantiene a lo largo de todas las apis
  • Se toma desde headers, si no existe se crea
  • Se adhiere a cada log en el sistema actual

tracer-request-id:

  • Es un identificador de tipo entero autoincrementado
  • Se inicializa a 1 en cada sesión en pwa
  • Si no existe se usa un random entre 1 millon y 10 millones
  • Es importante para correlacionar stages begin y end en logs

tracer-systems

  • Se le adhiere al final del string nombre del sistema actual

tracer-user-id:

  • Es el id de usuario
  • Se crea en kong

Todos estos tracers se pasan por headers HTTP o por mensaje (key headers) en colas.

Caso especial

En push notification desde killbill: No habrá empezado en pwa. Setear tracer-user-id a initialOwner

unhandledRejectionHandler

Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code

Se debe ejecutar al cuando se levanta la aplicación. Queda escuchando por "Unhandled promise rejections" y envía log de immediato, ya que loggerMiddleware no se ejecutará normalmente al ser este un error fatal. El log setea stage a "fatal". De todas formas puede recolectar y enviar tambien to otro log ya grabado para envio en stage: end.