[GitHub] [hudi] satishkotha commented on a change in pull request #2044: [HUDI-1228] Add utility method to query extra metadata

[GitBox <gi...@apache.org>]

satishkotha commented on a change in pull request #2044:
URL: https://github.com/apache/hudi/pull/2044#discussion_r478620546



##########
File path: hudi-common/src/main/java/org/apache/hudi/common/table/timeline/TimelineUtils.java
##########
@@ -98,4 +101,31 @@
 
     }).distinct().filter(s -> !s.isEmpty()).collect(Collectors.toList());
   }
+
+  /**
+   * Get extra metadata for specified key from latest commit/deltacommit instant.
+   */
+  public static Option<String> getExtraMetadataFromLatest(HoodieTableMetaClient metaClient, String extraMetadataKey) {
+    return metaClient.getCommitsTimeline().filterCompletedInstants().getReverseOrderedInstants().findFirst().map(instant ->
+        getMetadataValue(metaClient, extraMetadataKey, instant)).orElse(Option.empty());
+  }
+
+  /**
+   * Get extra metadata for specified key from all active commit/deltacommit instants.
+   */
+  public static Map<String, Option<String>> getExtraMetadataTimeline(HoodieTableMetaClient metaClient, String extraMetadataKey) {

Review comment:
       This is primarily for debugging. This helps with seeing how extra metadata value changed over time.  If you have better suggestion for a name, let me know




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