You want a Spring Boot bean to create a new instance for each HTTP session but share the same instance within that session. Which @Scope annotation and configuration should you use?

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Spring Boot - Spring Annotations

You want a Spring Boot bean to create a new instance for each HTTP session but share the same instance within that session. Which @Scope annotation and configuration should you use?

A@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)

B@Scope("prototype")

C@Scope("singleton")

D@Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES)

Step-by-Step Solution

Solution:

Step 1: Identify session scope for per-session bean
The session scope creates one bean instance per HTTP session, which fits the requirement.
Step 2: Use proxyMode for injection into singleton beans
Adding proxyMode = ScopedProxyMode.TARGET_CLASS allows safe injection into other beans by creating a proxy that resolves the correct session instance.
Final Answer:
@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS) -> Option A
Quick Check:
Session scope + proxyMode = new instance per session shared inside session [OK]

Quick Trick: Use session scope with proxyMode for per-session shared bean [OK]

Common Mistakes:

Using prototype scope which creates new instance every injection
Using singleton scope which shares one instance globally
Using request scope which creates new instance per HTTP request

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You want a Spring Boot bean to create a new instance for each HTTP session but share the same instance within that session. Which @Scope annotation and configuration should you use?

Step 1: Identify session scope for per-session bean

Step 2: Use proxyMode for injection into singleton beans

Final Answer:

Quick Check:

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