# Topology for demonstrating scenario call topology changes
# Shows add_calls and remove_calls for circuit-breaker and fallback patterns

version: 1

services:
  api:
    operations:
      request:
        duration: 10ms +/- 3ms
        error_rate: 0.5%
        calls:
          - database.query

  database:
    operations:
      query:
        duration: 5ms +/- 2ms
        error_rate: 0.1%

  cache:
    operations:
      get:
        duration: 1ms +/- 0.5ms

traffic:
  rate: 50/s

scenarios:
  # Circuit breaker: remove database call, add cache fallback
  - name: circuit breaker
    at: +3s
    duration: 4s
    override:
      api.request:
        remove_calls:
          - database.query
        add_calls:
          - target: cache.get