Consider a Spring Boot application where a service depends on another service that is lazily initialized. How can you use @Autowired to inject this dependency without causing startup errors?

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Spring Boot - Inversion of Control and Dependency Injection

Consider a Spring Boot application where a service depends on another service that is lazily initialized. How can you use @Autowired to inject this dependency without causing startup errors?

AUse @Lazy annotation along with @Autowired on the dependency

BRemove @Autowired and instantiate manually

CMake the dependent service static

DUse @Primary on the dependent service

Step-by-Step Solution

Solution:

Step 1: Understand lazy initialization
Lazy beans are created only when needed, so injecting them eagerly can cause errors.
Step 2: Use @Lazy with @Autowired
Adding @Lazy delays injection until the bean is actually used, preventing startup errors.
Final Answer:
Use @Lazy annotation along with @Autowired on the dependency -> Option A
Quick Check:
Lazy bean + @Lazy + @Autowired = safe injection [OK]

Quick Trick: Add @Lazy to delay injection of lazy beans [OK]

Common Mistakes:

Instantiating beans manually instead of using Spring
Making services static to fix injection
Using @Primary without addressing lazy init

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More Spring Boot Quizzes

Consider a Spring Boot application where a service depends on another service that is lazily initialized. How can you use @Autowired to inject this dependency without causing startup errors?

Step 1: Understand lazy initialization

Step 2: Use @Lazy with @Autowired

Final Answer:

Quick Check:

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