m1a2st commented on code in PR #22445:
URL: https://github.com/apache/kafka/pull/22445#discussion_r3367461521


##########
storage/src/test/java/org/apache/kafka/tiered/storage/utils/TieredStorageTestUtils.java:
##########
@@ -66,6 +73,34 @@ public class TieredStorageTestUtils {
     private static final Integer RLM_TASK_INTERVAL_MS = 500;
     private static final Integer RLMM_INIT_RETRY_INTERVAL_MS = 300;
 
+    public static List<LocalTieredStorage> 
remoteStorageManagers(Collection<KafkaBroker> brokers) {
+        List<LocalTieredStorage> storages = new ArrayList<>();
+        brokers.forEach(broker -> {
+            if (broker.remoteLogManagerOpt().isDefined()) {
+                RemoteLogManager remoteLogManager = 
broker.remoteLogManagerOpt().get();
+                RemoteStorageManager storageManager = 
remoteLogManager.storageManager();
+                if (storageManager instanceof 
ClassLoaderAwareRemoteStorageManager loaderAwareRSM) {
+                    if (loaderAwareRSM.delegate() instanceof 
LocalTieredStorage) {
+                        storages.add((LocalTieredStorage) 
loaderAwareRSM.delegate());
+                    }
+                } else if (storageManager instanceof LocalTieredStorage) {
+                    storages.add((LocalTieredStorage) storageManager);
+                }
+            } else {
+                throw new AssertionError("Broker " + broker.config().brokerId()
+                        + " does not have a remote log manager.");
+            }
+        });
+        return storages;
+    }
+
+    public static List<BrokerLocalStorage> 
localStorages(Collection<KafkaBroker> brokers) {

Review Comment:
   ditto



##########
storage/src/test/java/org/apache/kafka/tiered/storage/utils/TieredStorageTestUtils.java:
##########
@@ -66,6 +73,34 @@ public class TieredStorageTestUtils {
     private static final Integer RLM_TASK_INTERVAL_MS = 500;
     private static final Integer RLMM_INIT_RETRY_INTERVAL_MS = 300;
 
+    public static List<LocalTieredStorage> 
remoteStorageManagers(Collection<KafkaBroker> brokers) {

Review Comment:
   Since only `TieredStorageTestContext` uses this method, we can move it there.



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