used logger to print statement

Author: quantdevv

polling-publisher/subscriber-service/src/main/java/com/iluwatar/subscriber/KafkaConsumer.java

@@ -25,20 +25,24 @@
 
 package com.iluwatar.subscriber;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.kafka.annotation.KafkaListener;
 import org.springframework.stereotype.Service;
 
 /** Kafka consumer service to consume messages / updates. */
 @Service
 public class KafkaConsumer {
 
+  private static final Logger log = LoggerFactory.getLogger(KafkaConsumer.class);
+
   @KafkaListener(topics = "updates", groupId = "subscriber-group")
   public void listenUpdates(String message) {
-    System.out.println("[updates]: Received message: " + message);
+    log.info("[updates]: Received message: {}", message);
   }
 
   @KafkaListener(topics = "API", groupId = "subscriber-group")
   public void listenApi(String message) {
-    System.out.println("[API]: Received message from /send : " + message);
+    log.info("[API]: Received message from /send : {}", message);
   }
 }