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The Magic of Feature Toggles

王天甫 (Aki Wang) 許子庭 (Noah Hsu)

Feature Toggle

Function A Function B

Function A Function B

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@RestController public class LayoutController { @GetMapping("/layouts/order") public ResponseEntity> getLayoutOrder() { return ResponseEntity.ok(buildLayoutOrder()); } private Map, ?> buildLayoutOrder() { throw new UnsupportedOperationException("Not implemented yet"); } }

@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"); } }

BUY NOW BUY NOW V S

@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"); } }

@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"); } }

@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"); } }

Invisibility Speed Experimentation Safety Live Update

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

Feature Toggle is second best solution. The best solution is to find a way to gradually integrate, without Feature Branches or Feature Toggles

Flagship4j

Standardizing Feature Flagging for Everyone

One SDK, any backend Supports your favorite tools Speaks your language

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"); }

Supports your favorite tools

Speaks your language

OpenFlagr Open source feature flagging, A/B testing, and dynamic configuration microservice in Go.

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USE CASES

ON On / Off 100%

ON Rollout 100%

Blue A / B Testing Green 50% 50%

Q & A

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