HyukjinKwon commented on code in PR #47133: URL: https://github.com/apache/spark/pull/47133#discussion_r1692326848
########## python/pyspark/sql/streaming/stateful_processor.py: ########## @@ -0,0 +1,180 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +from abc import ABC, abstractmethod +from typing import Any, TYPE_CHECKING, Iterator, Union + +from pyspark.sql.streaming.stateful_processor_api_client import StatefulProcessorApiClient +from pyspark.sql.streaming.value_state_client import ValueStateClient + +import pandas as pd +from pyspark.sql.types import ( + StructType, + StructField, + IntegerType, + LongType, + ShortType, + FloatType, + DoubleType, + DecimalType, + StringType, + BooleanType, + DateType, + TimestampType, +) + +__all__ = ["StatefulProcessor", "StatefulProcessorHandle"] + +if TYPE_CHECKING: + from pyspark.sql.pandas._typing import DataFrameLike as PandasDataFrameLike + + +class ValueState: + """ + Class used for arbitrary stateful operations with the v2 API to capture single value state. + """ + + def __init__( + self, value_state_client: ValueStateClient, state_name: str, schema: Union[StructType, str] + ) -> None: + self._value_state_client = value_state_client + self._state_name = state_name + self.schema = schema + + def exists(self) -> bool: + """ + Whether state exists or not. + + .. versionadded:: 4.0.0 Review Comment: Adding it at class level docstring should be enough -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
