Immediately truncate full restriction on drain of periodic impulse (#…

…23765) * Immediately truncate full restriction on drain of periodic impulse * Whitespace format
apache · Nov 4, 2022 · 7dba78d · 7dba78d
1 parent 1685251
commit 7dba78d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/sdks/python/apache_beam/transforms/periodicsequence.py b/sdks/python/apache_beam/transforms/periodicsequence.py
@@ -51,6 +51,10 @@ def create_tracker(self, restriction):
   def restriction_size(self, unused_element, restriction):
     return restriction.size()
 
+  # On drain, immediately stop emitting new elements
+  def truncate(self, unused_element, unused_restriction):
+    return None
+
 
 class ImpulseSeqGenDoFn(beam.DoFn):
   '''