Never call Kafka inside a payment transaction (the transactional outbox pattern)

When building a core financial ledger, the single most dangerous line of code you can write looks completely harmless: @Transactional public TransferResponse postTransfer(TransferRequest request) { // 1. Update balances & create ledger entries in Postgres updateBalances(request); createLedgerEntries(request); // 2. Publish event to Kafka... Weiterlesen: Never call Kafka inside a payment transaction (the transactional outb…