clolov commented on code in PR #13172:
URL: https://github.com/apache/kafka/pull/13172#discussion_r1094783958


##########
clients/src/test/java/org/apache/kafka/clients/admin/MockAdminClient.java:
##########
@@ -596,22 +604,89 @@ synchronized public DeleteRecordsResult 
deleteRecords(Map<TopicPartition, Record
 
     @Override
     synchronized public CreateDelegationTokenResult 
createDelegationToken(CreateDelegationTokenOptions options) {
-        throw new UnsupportedOperationException("Not implemented yet");
+        KafkaFutureImpl<DelegationToken> future = new KafkaFutureImpl<>();
+
+        for (KafkaPrincipal renewer : options.renewers()) {
+            if (!renewer.getPrincipalType().equals(KafkaPrincipal.USER_TYPE)) {
+                future.completeExceptionally(new 
InvalidPrincipalTypeException(""));
+                return new CreateDelegationTokenResult(future);
+            }
+        }
+
+        String tokenId = Uuid.randomUuid().toString();
+        TokenInformation tokenInfo = new 
TokenInformation(tokenId,options.renewers().get(0), 
options.renewers(),System.currentTimeMillis(), options.maxlifeTimeMs(), -1);
+        DelegationToken token = new 
DelegationToken(tokenInfo,tokenId.getBytes());

Review Comment:
   ```suggestion
           DelegationToken token = new DelegationToken(tokenInfo, 
tokenId.getBytes());
   ```



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