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fix(api): retry commands that clash with a concurrent write

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Services run commands through a CommandRunner that runs one again (up to
5 times, waiting a little longer each time) when its aggregate changed
underneath, e.g. a saga writing to the same ticket. Each command loads its
aggregate fresh and stores its events in one transaction, so a
ConcurrencyError means nothing was stored and running it again is safe.
People no longer get a 409 for it, and the e2e suite stops flaking.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Josep Piguillem
2026-10-15 14:00:08 +02:00
parent 76312c079d
commit e14f445e6b
23 changed files with 208 additions and 114 deletions
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docs/03-api.md
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@@ -665,7 +665,7 @@ tiempo real, las subscriptions de GraphQL.
### Errores
`{ statusCode, code?, message }`: `400` entrada no válida (`message` es una lista), `401` sin token o token rechazado
por Pireon, `403`/`404` sin acceso, `409` cambio concurrente (reintentar) y `422` regla de negocio (p. ej. una
por Pireon, `403`/`404` sin acceso, `409` cambio concurrente (la API ya lo ha reintentado 5 veces; raro) y `422` regla de negocio (p. ej. una
transición que el workflow no permite).
### Generar un cliente en otra app