FrankYang0529 commented on code in PR #16019:
URL: https://github.com/apache/kafka/pull/16019#discussion_r1686466843


##########
tools/src/main/java/org/apache/kafka/tools/consumer/ConsoleConsumerOptions.java:
##########
@@ -364,6 +364,10 @@ private static String convertDeprecatedClass(String 
className) {
                 System.err.println("WARNING: kafka.tools.NoOpMessageFormatter 
is deprecated and will be removed in the next major release. " +
                         "Please use 
org.apache.kafka.tools.consumer.NoOpMessageFormatter instead");
                 return NoOpMessageFormatter.class.getName();
+            case 
"kafka.coordinator.transaction.TransactionLog$TransactionLogMessageFormatter":
+                System.err.println("WARNING: 
kafka.coordinator.transaction.TransactionLog$TransactionLogMessageFormatter is 
deprecated and will be removed in the next major release. " +
+                        "Please use 
org.apache.kafka.tools.consumer.TransactionLogMessageFormatter instead");
+                return className;

Review Comment:
   From JIRA description:
   > That is to say, `ConsoleConsumer` can accept the previous package name and 
then use the (java) implementation to parse and make same output.
   
   If we don't change `className` to 
`TransactionLogMessageFormatter.class.getName()`, do we use implementation from 
scala or java?



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