Spring Framework FAQ: Top Questions

Spring provides AOP to separate cross-cutting concerns such as logging, security, and transactions. It uses proxies and the AspectJ library to implement aspects.

📘 Core AOP Concepts:

• Aspect: Cross-cutting concern class.
• Join Point: Point during execution (e.g., method call).
• Advice: Code executed at join point.
• Pointcut: Expression to match join points.

📥 Example:

@Aspect
@Component
public class LoggingAspect {
  @Before("execution(* com.example.service.*.*(..))")
  public void logBefore() {
    System.out.println("Logging before method call");
  }
}

🏆 Expected Output:

Advice runs before matched methods across services.

🛠️ Use Cases:

• Audit logging.
• Security checks.
• Transaction management.