Tag: Eventually Consistent

All the articles with the tag "Eventually Consistent".

• [JPA + Spring Mastery 08] Transaction Split Patterns — Saga / Outbox / REQUIRES_NEW, from academic origins to a 9-scenario EXP-09b measurement

  4 May, 2026

  The maxim *don't call external APIs inside a transaction* is well known; the *how* is rarely treated honestly. This article goes from PROPAGATION's seven semantics to 2PC (XA)'s limits, to Garcia-Molina's 1987 Sagas paper, Pat Helland's CIDR 2005 Data on the Outside, and Vogels's ACM Queue 2008 Eventually Consistent — then through Toss SLASH24's SAGA, 29CM and Ridi's Outbox in production — and lands on the EXP-09b 9-scenario measurement matrix (patterns A/B/C × OFF/DB_FAIL/EXT_FAIL). Payments to Saga, notifications to Outbox, cache only to plain split — academic + production + measurement, in three layers.