robertwb commented on a change in pull request #11916:
URL: https://github.com/apache/beam/pull/11916#discussion_r438296283
##########
File path: sdks/python/apache_beam/transforms/userstate_test.py
##########
@@ -452,6 +459,40 @@ def clear_values(self,
bag_state=beam.DoFn.StateParam(BAG_STATE)):
self.assertEqual(['extra'], StatefulDoFnOnDirectRunnerTest.all_records)
+ def test_simple_read_modify_write_stateful_dofn(self):
+ class SimpleTestReadModifyWriteStatefulDoFn(DoFn):
+ VALUE_STATE = ReadModifyWriteStateSpec('value', StrUtf8Coder())
+
+ def process(self, element, last_element=DoFn.StateParam(VALUE_STATE)):
+ last_element.write('%s:%s' % element)
+ yield last_element.read()
+
+ with TestPipeline() as p:
+ (
+ p | beam.Create([('a', 1), ('b', 3), ('c', 5)])
+ | beam.ParDo(SimpleTestReadModifyWriteStatefulDoFn())
+ | beam.ParDo(self.record_dofn()))
+ self.assertEqual(['a:1', 'b:3', 'c:5'],
+ StatefulDoFnOnDirectRunnerTest.all_records)
+
+ def test_clearing_read_modify_write_state(self):
+ class SimpleClearingReadModifyWriteStatefulDoFn(DoFn):
+ VALUE_STATE = ReadModifyWriteStateSpec('value', VarIntCoder())
+
+ def process(self, element, last_element=DoFn.StateParam(VALUE_STATE)):
+ last_element.write(element[1])
Review comment:
Maybe to make this a stronger test, also write something at the end of
process, and try reading it at the very beginning.
##########
File path: sdks/python/apache_beam/runners/direct/direct_userstate.py
##########
@@ -25,6 +25,7 @@
from apache_beam.transforms import userstate
from apache_beam.transforms.trigger import _ListStateTag
from apache_beam.transforms.trigger import _SetStateTag
+from apache_beam.transforms.trigger import _ValueStateTag
Review comment:
Should this be renamed as well?
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