The SAGA pattern is a failure management pattern for distributed transactions. It manages data consistency across microservices in distributed transaction scenarios. A SAGA is a sequence of local transactions. Each local transaction updates the database and publishes an event or message to trigger the next local transaction in the SAGA. If a local transaction fails because it violates a business rule then the SAGA executes a series of compensating transactions that undo the changes that were made by the preceding local transactions.
E-commerce Order Processing: Order Service -> Payment Service -> Shipping Service. If Shipping fails, the system executes compensating transactions to refund payment and cancel the order.
# Code Concept for SAGA Pattern\n# This pattern is architectural.\n\nclass Service:\n def execute(self):\n # Implementation logic\n pass