Pudu programming language
Menu
Package

@chrismichaelps / pudu-lang-resilience

Resilience pipelines for Pudu: retry, circuit breaker, timeout, fallback, hedging, rate limiting, and chaos injection

0.1.0Apache-2.01

InstallClose

Outcome.md

Markdown71 lines2.1 KB

GitHub ↗

PuduLangResilience.Chaos.Outcome


type: module path: "@root/src/PuduLangResilience/Chaos/Outcome.pudu" fidelity: Active grammar: "[[grammar/pudu]]" depth_score: 0.5 depth_status: MEDIUM tags: [module] aliases: [PuduLangResilience.Chaos.Outcome]


Purpose

Answers a chosen outcome instead of running the callback, for a share of executions.

Interface

Signatures

export type Injected[T, E] = { context: Context.Context, outcome: Resilience.Outcome[T, E] }

export type Options[T, E] = {
  name: Option[Str],
  injection: Chaos.Injection,
  outcome: Option[Resilience.Outcome[T, E]],
  generator: Option[fn(Chaos.Arguments) -> Option[Resilience.Outcome[T, E]]],
  onInjected: Option[fn(Injected[T, E]) -> ()]
}

export fn defaults[T, E]() -> Options[T, E]

export fn injecting[T, E](outcome: Resilience.Outcome[T, E], injection: Chaos.Injection) -> Options[T, E]

export fn validate[T, E](options: &Options[T, E]) -> Array[Str]

export fn strategy[T, E](options: Options[T, E]) -> Strategy.Strategy[T, E]

Linkage

  • Requires: [[src/PuduLangResilience/Chaos]], [[src/PuduLangResilience/Constants/Events]], [[src/PuduLangResilience/Context]], [[src/PuduLangResilience]], [[src/PuduLangResilience/Strategy]], [[src/PuduLangResilience/Telemetry]].
  • Consumed by: package users, the suites, and examples/.

Algorithm

  1. When injecting, take the generator's outcome or the fixed one; report Chaos.OnOutcome, call onInjected, and answer it.

Negative Logic (Prohibited Paths)

  • An injected outcome never runs the callback.

Edge Cases

  • A generator answering nothing injects nothing.

Depth

DEPTH 0.5 (MEDIUM). Tested by the suite mirroring this module under test/.

Grill Log

  • Q: Why separate from faults? A: An outcome may be a value, which a fault cannot be. _Rejected:_ one strategy for both.

Referenced by

[[src/PuduLangResilience]] · [[src/PuduLangResilience/Chaos]] · [[src/PuduLangResilience/Chaos/_MOC]] · [[src/PuduLangResilience/Constants/Events]] · [[src/PuduLangResilience/Context]] · [[src/PuduLangResilience/Strategy]] · [[src/PuduLangResilience/Telemetry]]