Project Lombok Logging with SLF4J

Author: Jörg-Christian Müller

src/main/java/guru/springframework/spring6restmvc/controller/BeerController.java

@@ -1,15 +1,27 @@
 package guru.springframework.spring6restmvc.controller;
 
+import guru.springframework.spring6restmvc.model.Beer;
 import guru.springframework.spring6restmvc.services.BeerService;
 import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Controller;
 
+import java.util.UUID;
+
 /**
  * Created by jt, Spring Framework Guru.
  */
+@Slf4j
 @AllArgsConstructor
 @Controller
 public class BeerController {
     private final BeerService beerService;
 
+    public Beer getBeerById(UUID id){
+
+        log.debug("Get Beer by Id - in controller");
+
+        return beerService.getBeerById(id);
+    }
+
 }

src/main/java/guru/springframework/spring6restmvc/services/BeerService.java

@@ -1,14 +1,12 @@
 package guru.springframework.spring6restmvc.services;
 
 import guru.springframework.spring6restmvc.model.Beer;
-import org.springframework.stereotype.Service;
 
 import java.util.UUID;
 
 /**
  * Created by jt, Spring Framework Guru.
  */
-@Service
 public interface BeerService {
 
     Beer getBeerById(UUID id);

src/main/java/guru/springframework/spring6restmvc/services/BeerServiceImpl.java

@@ -2,6 +2,8 @@
 
 import guru.springframework.spring6restmvc.model.Beer;
 import guru.springframework.spring6restmvc.model.BeerStyle;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
 
 import java.math.BigDecimal;
 import java.time.LocalDateTime;
@@ -10,9 +12,14 @@
 /**
  * Created by jt, Spring Framework Guru.
  */
+@Slf4j
+@Service
 public class BeerServiceImpl implements BeerService {
     @Override
     public Beer getBeerById(UUID id) {
+
+        log.debug("Get Beer by Id - in service. Id: " + id.toString());
+
         return Beer.builder()
                 .id(id)
                 .version(1)

src/main/resources/application.properties

@@ -1 +1,2 @@
 
+logging.level.guru.springframework=debug

src/test/java/guru/springframework/spring6restmvc/controller/BeerControllerTest.java

@@ -0,0 +1,23 @@
+package guru.springframework.spring6restmvc.controller;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
+class BeerControllerTest {
+
+    @Autowired
+    BeerController beerController;
+
+    @Test
+    void getBeerById() {
+
+        System.out.println(beerController.getBeerById(UUID.randomUUID()));
+
+    }
+}