Update Consumer.java with dlq

src/main/java/com/example/consumer/Consumer.java

@@ -15,6 +15,8 @@ public class Consumer {
     @StreamListener(Processor.INPUT)
     public void consumeProductDetails(Product productDetails) {
         LOGGER.info("Consuming the  product details: {}", productDetails);
+        String a = null;
+        a.substring(0, 3);// to interrupt the consumer, then the data will be routed to dlq topic
     }
 
 }
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