Learning go error handling design from open source - Yu-Lang Chu

tags: COSCUP2021 Skilled zh-tw COSCUP2021 From Beginner to Gopher TR209

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Go Error API

Survive under the Crap Go Error System

Error are values

"Values can be programmed, and since errors are values, errors can be programmed." –Rob Pike

  • Strucct internal error
  • Error check inside function variable

Error handling strategies

Three categories of errors

Sentinel Error

  • predefined value

Error type

  • with more information
  • e.g. URL, email

Opaque error

  • asser errors for hehaviour not type
  • only care True/ False, but not error struct

Error Handling design in open source project

  • TiKV
    • Error type
    • Opaque error
  • go-redis
    • Opaque error
  • Prometheus – TSDB
  • K8s APImachinery
  • Go-Kratos
Select a repo