Added logging

src/main/java/io/ds/myaktion/MyaktionApplication.java

@@ -2,6 +2,8 @@ package io.ds.myaktion;
 
 import java.util.List;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
@@ -22,14 +24,16 @@ public class MyaktionApplication {
 	@Autowired
 	private DonationService donationService;
 
+	private Logger log = LoggerFactory.getLogger(MyaktionApplication.class);
+
 	public static void main(String[] args) {
 		SpringApplication.run(MyaktionApplication.class, args);
 	}
 
 	@Bean
 	CommandLineRunner initLoggerBean() {
-		return (args) -> {
-			System.out.println("Create sample data!");
+		return (args)->{
+			log.info("Adding Sample data to DB");
 			Account account1 = new Account();
 			account1.setName("Jogi Löw");
 			account1.setNameOfBank("KSK Freiburg");
@@ -60,8 +64,8 @@ public class MyaktionApplication {
 			donation1.setCampaign(campaign1);
 			campaign1.addDonation(donation1);
 
-			// Write campaign to DB
-			System.out.println("Add campaign to DB");
+			//Write campaign to DB
+			log.debug("Add campaign to DB");
 			Campaign savedCampaign = campaignService.addCampaign(campaign1);
 
 			// Add another donation to campaign
@@ -71,15 +75,14 @@ public class MyaktionApplication {
 			donation2.setDonorName("Hansi Flick");
 			donation2.setReceiptRequested(true);
 			donation2.setStatus(Donation.Status.IN_PROCESS);
-			System.out.println("Read all campaigns");
-
-			System.out.println("Add donation of campaign to DB");
+			
+			log.debug("Add donation of campaign to DB");			
 			donationService.addDonation(donation2, savedCampaign.getId());
 
 			// Read data from db and print to screen
 			List<Campaign> campaigns = campaignService.getCampaigns();
-			System.out.println("Read all campaigns again");
-			System.out.println(campaigns.toString());
+			log.debug("Read all campaigns again");
+			log.trace(campaigns.toString());
 		};
 	}
 }

src/main/java/io/ds/myaktion/services/CampaignService.java

@@ -2,6 +2,8 @@ package io.ds.myaktion.services;
 
 import java.util.List;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -13,12 +15,17 @@ public class CampaignService {
     @Autowired
     private CampaignRepository campaignRepository;
 
+    private Logger log = LoggerFactory.getLogger(CampaignService.class);
+
     public Campaign addCampaign(Campaign campaign) {
         Campaign savedCampaign = campaignRepository.save(campaign);
-        return savedCampaign;
+        log.trace("Saved campaign: "+ savedCampaign.toString());
+        return  savedCampaign;
     }
 
     public List<Campaign> getCampaigns() {
-        return campaignRepository.findAll();
+        List<Campaign> campaigns = campaignRepository.findAll();
+        log.trace("Read campaigns: "+ campaigns.toString());
+        return campaigns;
     }
 }

src/main/java/io/ds/myaktion/services/DonationService.java

@@ -2,6 +2,8 @@ package io.ds.myaktion.services;
 
 import java.util.Optional;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -20,14 +22,19 @@ public class DonationService {
     @Autowired
     private DonationRepository donationRepository;
 
+    private Logger log = LoggerFactory.getLogger(DonationService.class);
+    
     public Donation addDonation(Donation donation, Long campaignId) {
         Optional<Campaign> result = campaignRepository.findById(campaignId);
-        if (result.isEmpty())
-            throw new CampaignNotFoundException("Campaign not found!");
+        if (result.isEmpty()) {
+            CampaignNotFoundException e = new CampaignNotFoundException("Campaign not found!");
+            log.error(e.getMessage(), e);
+            throw e;
+        }
         Campaign existingCampaign = result.get();
         donation.setCampaign(existingCampaign);
-        Donation savedDonation = donationRepository.save(donation);
-        System.out.println("Saved Donation: " + savedDonation.toString());
+        Donation savedDonation = donationRepository.save(donation); 
+        log.trace("Saved Donation: "+savedDonation.toString());
         return savedDonation;
-    }
+    }    
 }

src/main/resources/application.properties

@@ -2,3 +2,6 @@
 spring.h2.console.enabled=true
 spring.datasource.url=jdbc:h2:mem:testdb
 spring.datasource.generate-unique-name=false
+
+#Set logging level for package io.ds.myaktion
+logging.level.io.ds.myaktion=TRACE