The Magic of Feature Toggles:

Speaker: Aki Wang, Noah Hsu
Event: iThome DevOps Day 2024

Transcript

2. The Magic of Feature Toggles
3. 王天甫 (Aki Wang) 許子庭 (Noah Hsu)
4. Feature Toggle
5. Function A Function B
6. Function A Function B
8. @RestController public class LayoutController { @GetMapping("/layouts/order") public ResponseEntity<?> getLayoutOrder() { return ResponseEntity.ok(buildLayoutOrder()); } private Map<?, ?> buildLayoutOrder() { throw new UnsupportedOperationException("Not implemented yet"); } }
9. @RestController public class LayoutController { @GetMapping("/layouts/order") public ResponseEntity<?> getLayoutOrder() { boolean isLayoutOrderEnabled = false; if (isLayoutOrderEnabled) { return ResponseEntity.ok(buildLayoutOrder()); } else { return ResponseEntity.notFound().build(); } } private Map<?, ?> buildLayoutOrder() { throw new UnsupportedOperationException("Not implemented yet"); } }
10. BUY NOW BUY NOW V S
11. @RestController public class LayoutController { @GetMapping("/layouts/order") public ResponseEntity<?> getLayoutOrder() { return ResponseEntity.ok(buildLayoutOrder()); } private Map<?, ?> buildLayoutOrder() { return Map.of("color", "blue", "radius", "8px", "pos", "page"); } }
12. @RestController public class LayoutController { @GetMapping("/layouts/order") public ResponseEntity<?> getLayoutOrder() { return ResponseEntity.ok(buildLayoutOrder()); } private Map<?, ?> buildLayoutOrder() { return Map.of("color", "green", "radius", "0px", "pos", "bottomNav"); } }
13. @RestController public class LayoutController { @GetMapping("/layouts/order") public ResponseEntity<?> getLayoutOrder() { String themeName = "themeB"; switch (themeName) { case "themeB": return ResponseEntity.ok(buildThemeBLayoutOrder()); default: return ResponseEntity.ok(buildThemeALayoutOrder()); } } private Map<?, ?> buildThemeALayoutOrder() { return Map.of("color", "blue", "radius", "8px", "pos", "page"); } private Map<?, ?> buildThemeBLayoutOrder() { return Map.of("color", "green", "radius", "0px", "pos", "bottomNav"); } }
14. Invisibility Speed Experimentation Safety Live Update
15. longevity dynamism Release Toggles Ops Toggles Permission Toggles Experiment Toggles years months weeks days changes with a deployment changes with runtime re-configuration changes with each request from https://martinfowler.com/articles/feature-toggles.html
16. Feature Toggle is second best solution. The best solution is to find a way to gradually integrate, without Feature Branches or Feature Toggles
17. Flagship4j
18. Standardizing Feature Flagging for Everyone
19. One SDK, any backend Supports your favorite tools Speaks your language
20. One SDK, any backend OpenFeatureAPI api = OpenFeatureAPI.getInstance(); api.setProvider(new OpenFlagrProvider()); Client client = api.getClient(); Boolean isHelloWorldEnabled = client.getBooleanValue("hello-world-enabled", false); if (isHelloWorldEnabled) { System.out.println("Hello World"); }
21. Supports your favorite tools
22. Speaks your language
23. OpenFlagr Open source feature flagging, A/B testing, and dynamic configuration microservice in Go.
26. USE CASES
27. ON On / Off 100%
28. ON Rollout 100%
29. Blue A / B Testing Green 50% 50%
30. Q & A