Saga Pattern Made Easy

The Saga Design Pattern is useful when your logic involves multiple steps across various services or databases, and partial execution is undesirable. It functions as a state machine tracking program progress, preventing multiple credit card charges, reverting if necessary, and ensuring consistent recovery in case of failure. A common example is trip planning, where booking an airplane ticket, reserving a hotel, and getting a guided tour ticket are all coupled. The Saga Pattern compensates for failures by undoing actions when needed. It consists of two parts: defined behavior for "going backwards" (compensations) and behavior for striving towards forward progress (saving state). Implementing sagas in code can be simplified using Temporal, which automatically saves state and retries on failure at any level.