[Solved] How can you correctly inject ApplicationEventPublisher into a Spring-managed bean? — Ans: By declaring a field with @Autowired annotation of type... | Spring Boot

Spring Boot - Advanced Patterns

How can you correctly inject ApplicationEventPublisher into a Spring-managed bean?

ABy extending <code>ApplicationEventPublisher</code> in your bean class

BBy creating a new instance of <code>ApplicationEventPublisher</code> using the <code>new</code> keyword

CBy declaring a field with <code>@Autowired</code> annotation of type <code>ApplicationEventPublisher</code>

DBy annotating the class with <code>@EventPublisher</code>

Step-by-Step Solution

Solution:

Step 1: Understand Spring injection
Spring injects beans via annotations like @Autowired.
Step 2: Check options
By declaring a field with @Autowired annotation of type ApplicationEventPublisher uses @Autowired correctly. By creating a new instance of ApplicationEventPublisher using the new keyword is invalid because ApplicationEventPublisher is an interface managed by Spring. By extending ApplicationEventPublisher in your bean class is incorrect as it is an interface, not meant to be extended. By annotating the class with @EventPublisher is invalid since @EventPublisher does not exist.
Final Answer:
By declaring a field with @Autowired annotation of type ApplicationEventPublisher -> Option C
Quick Check:
Use Spring's dependency injection for ApplicationEventPublisher [OK]

Quick Trick: Use @Autowired to inject ApplicationEventPublisher [OK]

Common Mistakes:

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How can you correctly inject ApplicationEventPublisher into a Spring-managed bean?