m-trieu commented on code in PR #34539:
URL: https://github.com/apache/beam/pull/34539#discussion_r2033816500


##########
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/windmill/WindmillConnection.java:
##########
@@ -48,17 +49,21 @@ public static Builder builder() {
 
   public abstract String backendWorkerToken();
 
-  public abstract Optional<WindmillServiceAddress> directEndpoint();
+  abstract Optional<WindmillServiceAddress> directEndpoint();
 
-  public abstract CloudWindmillServiceV1Alpha1Stub stub();
+  abstract Supplier<CloudWindmillServiceV1Alpha1Stub> stubFactory();
+
+  public final CloudWindmillServiceV1Alpha1Stub newStub() {
+    return stubFactory().get();
+  }
 
   @AutoValue.Builder
   public abstract static class Builder {
     abstract Builder setBackendWorkerToken(String backendWorkerToken);
 
-    public abstract Builder setDirectEndpoint(WindmillServiceAddress value);
+    abstract Builder setDirectEndpoint(WindmillServiceAddress value);
 
-    public abstract Builder setStub(CloudWindmillServiceV1Alpha1Stub stub);
+    public abstract Builder 
setStubFactory(Supplier<CloudWindmillServiceV1Alpha1Stub> stubFactory);

Review Comment:
   done



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