distributedsystem/microservice microservicepatterns
Microservices Patterns: The Saga Pattern | Cloud Native Daily
Mastering Distributed Transactions: From 2PC to the Saga Pattern | by Aseem | Medium
Intro
Widely Used in Microservices.
Asynchronous.
A saga is a sequence of local transactions. Each local transaction updates the database and publishes a message or event 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.
Coordination
There are two common implementation approaches:
- Choreography: Each local transaction publishes domain events that trigger local transactions in other services.
- Orchestration: An orchestrator tells the participants what local transactions to execute.