In a Spring Boot application, you have two beans of the same type but want to inject one based on a runtime condition. How can you combine @Qualifier with Spring's @Profile annotation to achieve this?

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Spring Boot - Inversion of Control and Dependency Injection

In a Spring Boot application, you have two beans of the same type but want to inject one based on a runtime condition. How can you combine @Qualifier with Spring's @Profile annotation to achieve this?

AAnnotate each bean with @Profile for different environments and use @Qualifier to inject the correct one

BUse @Qualifier only and ignore @Profile

CUse @Profile on the injection point instead of beans

DUse @Primary on both beans and @Qualifier on injection

Step-by-Step Solution

Solution:

Step 1: Use @Profile to define beans for different environments
Annotate each bean with @Profile("dev"), @Profile("prod"), etc., to activate based on runtime environment.
Step 2: Use @Qualifier to specify which bean to inject
Use @Qualifier with the bean name to inject the correct bean matching the active profile.
Final Answer:
Annotate each bean with @Profile for different environments and use @Qualifier to inject the correct one -> Option A
Quick Check:
@Profile + @Qualifier = conditional bean injection [OK]

Quick Trick: Combine @Profile on beans and @Qualifier on injection [OK]

Common Mistakes:

Using @Profile on injection point instead of beans
Ignoring @Profile and expecting runtime switching
Using @Primary on multiple beans causing conflicts

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More Spring Boot Quizzes

In a Spring Boot application, you have two beans of the same type but want to inject one based on a runtime condition. How can you combine @Qualifier with Spring's @Profile annotation to achieve this?

Step 1: Use @Profile to define beans for different environments

Step 2: Use @Qualifier to specify which bean to inject

Final Answer:

Quick Check:

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