Logging with SLF4J & Logback
Logging with SLF4J and Logback, log levels, configuration, appenders, patterns, package-level logging
1What is SLF4J in the Java ecosystem?
What is SLF4J in the Java ecosystem?
Resposta
SLF4J (Simple Logging Facade for Java) is an abstraction facade for various Java logging frameworks (Logback, Log4j, JUL). It allows decoupling application code from the concrete logging implementation, making it easy to change frameworks without modifying business code. Spring Boot uses SLF4J with Logback as the default implementation.
2What is the default logging implementation in Spring Boot?
What is the default logging implementation in Spring Boot?
Resposta
Logback is the default logging implementation in Spring Boot. Developed by the creator of Log4j, Logback offers better performance, more flexible configuration, and native SLF4J compatibility. Spring Boot includes it automatically via spring-boot-starter-logging which is a transitive dependency of all web starters.
3How to create a Logger instance with SLF4J in a Spring class?
How to create a Logger instance with SLF4J in a Spring class?
Resposta
The recommended method is LoggerFactory.getLogger(ClassName.class) which creates a logger based on the fully qualified class name. This enables a consistent logger hierarchy with Java packages and simplifies configuration by package. Alternatively, Lombok provides @Slf4j which automatically generates the logger.
What are the standard log levels in SLF4J, from most verbose to most critical?
Which Spring Boot property sets the log level for a specific package?
+17 perguntas de entrevista
Outros temas de entrevista Spring Boot
Spring Core - IoC & DI
Spring Boot Auto-Configuration
Spring Boot Starters
Application Properties & YAML
Spring Boot DevTools
Spring MVC Basics
Spring REST Controllers
Request & Response Handling
Exception Handling
Bean Validation
Spring Data JPA Basics
JPA Entities & Relationships
JPA Queries
Spring Data Repositories
Spring Security Basics
Spring Boot Actuator
Unit Testing with JUnit & Mockito
Spring Boot Testing
Profiles & Environment
RestTemplate & WebClient
Async & Scheduling
Caching with Spring
Spring WebFlux (Reactive)
Spring Transactions
Advanced Authentication & Authorization
JWT & Stateless Security
OAuth2 & Authorization Server
Spring Boot & Docker
Microservices with Spring
Spring Cloud Config
Performance Optimization
GraalVM Native Images
Domine Spring Boot para sua proxima entrevista
Acesse todas as perguntas, flashcards, testes tecnicos, exercicios de code review e simuladores de entrevista.
Comece gratis