chia7712 commented on code in PR #19202:
URL: https://github.com/apache/kafka/pull/19202#discussion_r1997212608


##########
clients/clients-integration-tests/src/test/java/org/apache/kafka/clients/consumer/ShareConsumerTest.java:
##########
@@ -2473,4 +2414,57 @@ private void shutdownExecutorService(ExecutorService 
service) {
             Thread.currentThread().interrupt();
         }
     }
+
+    private static class SerializerImpl implements Serializer<byte[]> {
+        private final ByteArraySerializer serializer = new 
ByteArraySerializer();

Review Comment:
   SerializerImpl can implement all methods by itself without 
`ByteArraySerializer`, right?



##########
clients/clients-integration-tests/src/test/java/org/apache/kafka/clients/consumer/ShareConsumerTest.java:
##########
@@ -2473,4 +2414,57 @@ private void shutdownExecutorService(ExecutorService 
service) {
             Thread.currentThread().interrupt();
         }
     }
+
+    private static class SerializerImpl implements Serializer<byte[]> {
+        private final ByteArraySerializer serializer = new 
ByteArraySerializer();
+
+        @Override
+        public byte[] serialize(String topic, Headers headers, byte[] data) {
+            headers.add(KEY, VALUE.getBytes());
+            return serializer.serialize(topic, data);
+        }
+
+        @Override
+        public void configure(Map<String, ?> configs, boolean isKey) {
+            serializer.configure(configs, isKey);
+        }
+
+        @Override
+        public void close() {
+            serializer.close();
+        }
+
+        @Override
+        public byte[] serialize(String topic, byte[] data) {
+            fail("method should not be invoked");
+            return null;
+        }
+    }
+
+    private static class DeserializerImpl implements Deserializer<byte[]> {
+        private final ByteArrayDeserializer deserializer = new 
ByteArrayDeserializer();

Review Comment:
   ditto



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