findingrish commented on code in PR #16676:
URL: https://github.com/apache/druid/pull/16676#discussion_r1668453368
##########
server/src/main/java/org/apache/druid/client/coordinator/CoordinatorClient.java:
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@@ -69,4 +69,9 @@ public interface CoordinatorClient
* Returns a new instance backed by a ServiceClient which follows the
provided retryPolicy
*/
CoordinatorClient withRetryPolicy(ServiceRetryPolicy retryPolicy);
+
+ /**
+ * Retrieves list of used datasources.
+ */
+ ListenableFuture<Set<String>> fetchUsedDataSources();
Review Comment:
I have updated the method name to `fetchDatasourcesWithUsedSegments` to make
it more understandable.
I don't think we need to document about what `used segments` means, since it
is widely referred in the code and docs. For example, here
https://druid.apache.org/docs/latest/api-reference/data-management-api/#mark-a-single-segment-as-used.
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