Here's how to configure Logback for logging in your Spring Boot application: 1. First, create a `logback-spring.xml` file in your `src/main/resources` directory. This file will configure Logback's logging behavior. ```xml

%d{yyyy-MM-dd HH:mm:ss} - %c - %p - %m%n chatapp.log chatapp_%d{yyyy-MM-dd}.log 30 %d{yyyy-MM-dd HH:mm:ss} - %c - %p - %m%n

``` 2. Update your `application.properties` file to configure logging levels: ```properties logging.level.com.example.chatapp=INFO logging.file.name=chatapp.log logging.file.path=./logs/ ``` 3. Add Lombok dependency to your `pom.xml` for easier logging: ```xml org.projectlombok lombok 1.18.24 provided ``` 4. Use logging in your service classes using Lombok's @Slf4j annotation: ```java package com.example.chatapp.service; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Service; @Service @Slf4j public class MessageService { public void sendMessage(String message) { try { log.info("Sending message: {}", message); // Your logic here log.debug("Message sent successfully"); } catch (Exception e) { log.error("Error sending message: ", e); throw new RuntimeException("Failed to send message", e); } } } ``` To test this configuration: 1. Start your Spring Boot application 2. Check the console output for log messages 3. Verify that logs are being written to the file specified in the configuration Next Steps: 1. Use try-catch blocks in your service methods to handle exceptions 2. Implement custom exception handling using @ExceptionHandler 3. Create an ErrorController to handle application-wide errors Read more about: - [Logback Configuration](https://logback.qos.ch/documentation/) - [Lombok Logging](https://projectlombok.org/features/log) - [Spring Boot Logging Best Practices](https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#features.logging.custom-logback)