stankiewicz commented on code in PR #36534:
URL: https://github.com/apache/beam/pull/36534#discussion_r2505019459


##########
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/WindmillKeyedWorkItem.java:
##########
@@ -108,13 +115,22 @@ public Iterable<WindowedValue<ElemT>> elementsIterable() {
                 Collection<? extends BoundedWindow> windows =
                     WindmillSink.decodeMetadataWindows(windowsCoder, 
message.getMetadata());
                 PaneInfo paneInfo = 
WindmillSink.decodeMetadataPane(message.getMetadata());
+                // Draining value is based on upstream data
+                boolean drainingValueFromUpstream = false;
                 if (WindowedValues.WindowedValueCoder.isMetadataSupported()) {
-                  WindmillSink.decodeAdditionalMetadata(windowsCoder, 
message.getMetadata());
+                  BeamFnApi.Elements.ElementMetadata elementMetadata =
+                      WindmillSink.decodeAdditionalMetadata(windowsCoder, 
message.getMetadata());
+                  drainingValueFromUpstream =
+                      elementMetadata.hasDrain()
+                          ? (elementMetadata.getDrain()
+                              == BeamFnApi.Elements.DrainMode.Enum.DRAINING)
+                          : false;

Review Comment:
   @gemini-code-assist good bot



##########
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/UngroupedWindmillReader.java:
##########
@@ -117,8 +118,14 @@ protected WindowedValue<T> decodeMessage(Windmill.Message 
message) throws IOExce
       Collection<? extends BoundedWindow> windows =
           WindmillSink.decodeMetadataWindows(windowsCoder, 
message.getMetadata());
       PaneInfo paneInfo = 
WindmillSink.decodeMetadataPane(message.getMetadata());
+      boolean drainingValueFromUpstream = false;
       if (WindowedValues.WindowedValueCoder.isMetadataSupported()) {
-        WindmillSink.decodeAdditionalMetadata(windowsCoder, 
message.getMetadata());
+        BeamFnApi.Elements.ElementMetadata elementMetadata =
+            WindmillSink.decodeAdditionalMetadata(windowsCoder, 
message.getMetadata());
+        drainingValueFromUpstream =
+            elementMetadata.hasDrain()
+                ? (elementMetadata.getDrain() == 
BeamFnApi.Elements.DrainMode.Enum.DRAINING)
+                : false;

Review Comment:
   @gemini-code-assist good bot



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