How can you implement a feature flag in Spring Boot that supports dynamic updates without restarting the application?

hard📝 Application Q9 of 15

Spring Boot - Advanced Patterns

AStore the feature flag in a static final variable

BUse Spring Cloud Config with a refresh scope bean for the feature flag

CHardcode the feature flag value in the source code

DUse a constant in application.properties without refresh

Step-by-Step Solution

Solution:

Step 1: Identify dynamic config options
Spring Cloud Config supports external config with refresh scope for dynamic updates.
Step 2: Match to options
Use Spring Cloud Config with a refresh scope bean for the feature flag uses Spring Cloud Config and refresh scope, enabling runtime updates without restart.
Final Answer:
Use Spring Cloud Config with a refresh scope bean for the feature flag -> Option B
Quick Check:
Refresh scope enables dynamic config updates [OK]

Quick Trick: Use refresh scope beans for dynamic feature flags [OK]

Common Mistakes:

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