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掌握Feature Toggle
與OpenFeature規範
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許子庭
(Noah Hsu)
台灣連線
2018 ~ 2021 : Java Engineer
2021 ~ : Server-Side Engineer
2022 ~ : Pipeline TF
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01
02
03
What & Why
What & Why
What
OpenFeature
Flagship4J
Feature Toggle
CONTENT
04
How & When
Using Flagship4J
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SECTION 01
Improve development/testing/deployment flexibility
Feature Toggle
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Dynamic (no code change) manage application behavior
What is Feature Toggle
AS IS
TO BE
Given
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UI Example (Flagr)
What is Feature Toggle
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UI Example (Flagr)
What is Feature Toggle
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Dynamic (no code change) manage application behavior
Why Feature Toggle
• Hard Code
• Code Change
• Deploy
• Config • DB
• Change DB
• DB traffic
• Feature Toggle
• Network Traffic
• UI management
• Deploy
• Restart
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Benefit of
Feature
Toggle
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SECTION 02
OpenFeature
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What is OpenFeature
OpenFeature is an open source CNCF incubating project under the Apache 2
license.
OpenFeature is an open specification that provides a vendor-agnostic,
community-driven API for feature flagging that works with your favorite feature
flag management tool or in-house solution.
(https://openfeature.dev/, 2024 Sep.)
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01
One SDK, any
backend
02
Supports your
favorite tools
03
Speaks your
language
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SECTION 03
Feature toggle system API-Client SDK follow
OpenFeature specification.
Flagship4j
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Flagship4j
Openflagr Provider
Java starter
Spring Boot starter
Use-case example code
The “One SDK”
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Easy to Use
Spring Boot starter Java starter
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SECTION 04
Using Flagship4j
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Toggle Type
https://martinfowler.com/articles/feature-toggles.html, 2024
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2024.12.24
remove old code
and toggle
2024.12.17 2024.12.20 2024.12.20
open toggle
vendor’s API
ready
new feature
deploy (toggle
off)
time
The API Vendor release date doesn't match
Release Toggle Case
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On/Off Release
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Migrate search API which has unclear performance implications
Ops Toggle Case
2024.12.26
100% rollout
2024.12.17 2024.12.20 2024.12.23
60%
25% rollout
Deploy change
(10% rollout)
time
2024.12.31
remove code
and toggle
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Rollout
xxx.xxxx@sw-host
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To test green or blue button attracts more purchases
Experiment Toggle Case
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Beta feature are only available to internal users and beta user
Permission Toggle Case
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