Stateful Solutions: A Hands-On Guide to FSM in Golang

Discover the power of Finite State Machines (FSMs) in Golang. This talk offers a concise guide on implementing FSMs, enhancing code efficiency and simplifying complex logic in Go applications, and a bonus!

Transcript

1. Stateful Solutions A Hands-On Guide to FSM in Golang
2. Ilya Kaznacheev, PhD Cloud-Native Architect Ex. GDE on Google Cloud 12 years in software engineering
4. Finite State Machine A simple computer program that has a limited number of speci fi c conditions or “states”; it can be in at any given time. It starts in an initial state and then moves between states in response to certain inputs or events, following prede fi ned rules.
5. How to implement FSM in Go • array (table) • map • switch-case • DSL • library • platform
6. – David Lynch “Even bad co ff ee is better than no co ff ee at all.”
8. States • warming up • idle • making coffee • turned off
9. Events • turn on • turn off • start brewing • stop brewing • warmed up
11. let’s brew code!
13. array (table)
15. map
17. switch-case
19. DSL
21. library
23. platform
30. Real-World Scenarios when and how to use state machines
31. Use-Cases • pipelines / work fl ows • distributed transactions • domain logic
34. Practical Tips • process events atomically • save state in persistent storage • trace and audit events and transitions • event sourcing works well with state machines
35. documentation
37. MermaidJS stateDiagram - v2 [*] - - > turned_off turned_off - - > warming_up: turn on warming_up - - > idle: warmed up idle - - > making_coffee: start brewing idle - - > turned_off: turn off making_coffee - - > idle: done brewing
38. Summing Up FSM can be: • static or dynamic • compile-time or run-time • code- fi rst or design- fi rst • fl exible or rigid • interpreted or orchestrated
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43. Thank You! Any questions now?