Automating the Saga Pattern with Temporal

This technical report discusses the Saga pattern, an architectural design pattern designed to ensure state consistency in multi-step and distributed business transactions. It outlines the complexities involved in managing multi-step transactions, particularly when failures occur, which can compromise the integrity of the transaction. The report explains how the Saga pattern addresses these challenges by utilizing compensations to revert the system to its last known good state. Additionally, it details the implementation of the Saga pattern using Temporal, an open-source durable execution platform. The report describes the role of the Saga Execution Coordinator (SEC) in managing the flow of transactions and handling failures. It emphasizes the benefits of using Temporal to automate the heavy lifting required for implementing the Saga pattern, including scheduling, retry behavior, and maintaining the history of workflows. The report concludes with an example of code implementation, illustrating how Temporal simplifies the programming of complex Sagas.