Cleaning up the kafka native serialization sample

kafka-native-serialization/src/main/java/com/example/kafkanativeserialization/MyJsonSerializer.java

@@ -1,19 +0,0 @@
-package com.example.kafkanativeserialization;
-
-import org.apache.kafka.common.header.Headers;
-import org.springframework.kafka.support.serializer.JsonSerializer;
-import org.springframework.lang.Nullable;
-
-public class MyJsonSerializer extends JsonSerializer<Object> {
-
-	@Override
-	@Nullable
-	public byte[] serialize(String topic, Headers headers, @Nullable Object data) {
-		return super.serialize(topic, headers, data);
-	}
-	@Override
-	@Nullable
-	public byte[] serialize(String topic, @Nullable Object data) {
-		return super.serialize(topic, data);
-	}
-}

kafka-native-serialization/src/main/resources/application.yml

@@ -14,4 +14,4 @@ spring.cloud:
         process-out-0:
           producer:
             configuration:
-              value.serializer: com.example.kafkanativeserialization.MyJsonSerializer
+              value.serializer: org.springframework.kafka.support.serializer.JsonSerializer

kafka-native-serialization/src/test/java/com/example/kafkanativeserialization/KafkaNativeSerializationApplicationTests.java

@@ -54,7 +54,7 @@ public class KafkaNativeSerializationApplicationTests {
 
 		Consumer<byte[], Person> consumer = cf.createConsumer();
 		consumer.subscribe(Collections.singleton(OUTPUT_TOPIC));
-		ConsumerRecords<byte[], Person> records = consumer.poll(Duration.ofSeconds(5));
+		ConsumerRecords<byte[], Person> records = consumer.poll(Duration.ofSeconds(10));
 		consumer.commitSync();
 
 		assertThat(records.count()).isEqualTo(1);