FORGET ME PLEASE? EVENT SOURCING & THE GDPR Michiel Rook - - PowerPoint PPT Presentation

Ledger Entry Aug 14 Inventory € 15600,00 Accounts Payable € 15600,00 Ledger Correction Entry Aug 14 Inventory € 900,00 Accounts Payable € 900,00 Ledger Entry Aug 14 Inventory € 16500,00 Accounts Payable € 16500,00 @michieltcs

COMPENSATING ACTIONS class MoneyWithdrawn { 
 String accountId; 
 BigDecimal amount; 
 Typo: too much withdrawn! } class WithdrawalRolledBack { 
 String accountId; 
 BigDecimal amount; 
 }

COMPENSATING ACTIONS class AccountOpened { 
 String accountId; 
 String accountNumber; 
 Duplicate account number! } class DuplicateAccountClosed { 
 String accountId; 
 }

GDPR?

STRATEGIES

ONLY REMOVE FROM PROJECTION?

LEGAL DEFENCE?

' .. adequate, relevant and limited to what is necessary in relation to the purposes for which they are processed (‘data minimisation’) -GDPR, Article 5

UPCASTING?

UPCASTING Event Store Event_V1 Upcaster Event_V2 Event Handler @michieltcs

UPCASTING Event Store Event_V1 Event_V2 = f(Event_V1) Upcaster Event_V2 Event Handler @michieltcs

UPCASTING Event Store Event_V1 Event_V2 = f(Event_V1) Upcaster Event_V2 Event Handler @michieltcs

DELETING EVENTS

DELETING EVENTS

MODIFYING EVENTS

MODIFYING EVENTS