text: from collections import defaultdict, namedtuple, OrderedDict
  import logging
  import numpy as np
  import time
  from pkg_resources import resource_filename
  import weakref
  
  import mlflow
  from mlflow.entities import Metric, Param
  from mlflow.tracking.client import MlflowClient
  from mlflow.utils import (
      _chunk_dict,
      _truncate_dict,
      _get_fully_qualified_class_name,
      _inspect_original_var_name,
  )
  from mlflow.utils.autologging_utils import (
      _get_new_training_session_class,
      autologging_integration,
      safe_patch,
  )
  from mlflow.utils.autologging_utils import get_method_call_arg_value
  from mlflow.utils.file_utils import TempDir
  from mlflow.utils.mlflow_tags import MLFLOW_AUTOLOGGING, MLFLOW_PARENT_RUN_ID
  from mlflow.utils.validation import (
      MAX_PARAMS_TAGS_PER_BATCH,
      MAX_PARAM_VAL_LENGTH,
      MAX_ENTITY_KEY_LENGTH,
  )
  
  _logger = logging.getLogger(__name__)
  _SparkTrainingSession = _get_new_training_session_class()
  
  AUTOLOGGING_INTEGRATION_NAME = "pyspark.ml"
  
  
  def _read_log_model_allowlist_from_file(allowlist_file):
      allowlist = set()
      with open(allowlist_file) as f:
          for line in f:
              stripped = line.strip()
              is_blankline_or_comment = stripped == "" or stripped.startswith("#")
              if not is_blankline_or_comment:
                  allowlist.add(stripped)
      return allowlist
  
  
  def _read_log_model_allowlist():
      """
      Reads the module allowlist and returns it as a set.
      """
      from mlflow.utils._spark_utils import _get_active_spark_session
  
      builtin_allowlist_file = resource_filename(__name__, "log_model_allowlist.txt")
      spark_session = _get_active_spark_session()
      if not spark_session:
          _logger.info(
              "No SparkSession detected. Autologging will log pyspark.ml models contained "
              "in the default allowlist. To specify a custom allowlist, initialize a SparkSession "
              "prior to calling mlflow.pyspark.ml.autolog() and specify the path to your allowlist "
              "file via the spark.mlflow.pysparkml.autolog.logModelAllowlistFile conf."
          )
          return _read_log_model_allowlist_from_file(builtin_allowlist_file)
  
      allowlist_file = spark_session.sparkContext._conf.get(
          "spark.mlflow.pysparkml.autolog.logModelAllowlistFile", None
      )
      if allowlist_file:
          try:
              return _read_log_model_allowlist_from_file(allowlist_file)
          except Exception:
              # fallback to built-in allowlist file
              _logger.exception(
                  (
                      "Reading from custom log_models allowlist file %s failed, "
                      "fallback to built-in allowlist file."
                  ),
                  allowlist_file,
              )
              return _read_log_model_allowlist_from_file(builtin_allowlist_file)
      else:
          return _read_log_model_allowlist_from_file(builtin_allowlist_file)
  
  
  # When autolog called, `_log_model_allowlist` will be initialized.
  _log_model_allowlist = None
  
  
  def _get_warning_msg_for_skip_log_model(model):
      return (
          f"Model {model.uid} will not be autologged because it is not allowlisted or or because "
          "one or more of its nested models are not allowlisted. Call mlflow.spark.log_model() "
          "to explicitly log the model, or specify a custom allowlist via the "
          "spark.mlflow.pysparkml.autolog.logModelAllowlistFile Spark conf "
          "(see mlflow.pyspark.ml.autolog docs for more info)."
      )
  
  
  def _should_log_model(spark_model):
      from pyspark.ml.base import Model
  
      # TODO: Handle PipelineModel/CrossValidatorModel/TrainValidationSplitModel
      class_name = _get_fully_qualified_class_name(spark_model)
      if class_name in _log_model_allowlist:
          if class_name == "pyspark.ml.classification.OneVsRestModel":
              return _should_log_model(spark_model.models[0])
          elif class_name == "pyspark.ml.pipeline.PipelineModel":
              return all(
                  _should_log_model(stage) for stage in spark_model.stages if isinstance(stage, Model)
              )
          elif _is_parameter_search_model(spark_model):
              return _should_log_model(spark_model.bestModel)
          else:
              return True
      else:
          return False
  
  
  def _get_estimator_info_tags(estimator):
      """
      :return: A dictionary of MLflow run tag keys and values
               describing the specified estimator.
      """
      return {
          "estimator_name": estimator.__class__.__name__,
          "estimator_class": _get_fully_qualified_class_name(estimator),
      }
  
  
  def _is_parameter_search_estimator(instance):
      from pyspark.ml.tuning import CrossValidator, TrainValidationSplit
  
      return isinstance(instance, (CrossValidator, TrainValidationSplit))
  
  
  def _is_parameter_search_model(instance):
      from pyspark.ml.tuning import CrossValidatorModel, TrainValidationSplitModel
  
      return isinstance(instance, (CrossValidatorModel, TrainValidationSplitModel))
  
  
  def _should_log_hierarchy(estimator):
      from pyspark.ml import Pipeline
      from pyspark.ml.classification import OneVsRest
  
      return isinstance(estimator, (Pipeline, OneVsRest)) or _is_parameter_search_estimator(estimator)
  
  
  _AutologgingEstimatorMetadata = namedtuple(
      "_AutologgingEstimatorMetadata",
      ["hierarchy", "uid_to_indexed_name_map", "param_search_estimators"],
  )
  
  
  def _traverse_stage(stage):
      from pyspark.ml import Pipeline
      from pyspark.ml.classification import OneVsRest
  
      yield stage
      if isinstance(stage, Pipeline):
          original_sub_stages = stage.getStages()
  
          try:
              iter(original_sub_stages)
          except TypeError:
              raise TypeError(
                  f"Pipeline stages should be iterable, but found object {original_sub_stages}"
              )
          for stage in original_sub_stages:
              yield from _traverse_stage(stage)
      elif isinstance(stage, OneVsRest):
          yield from _traverse_stage(stage.getClassifier())
      elif _is_parameter_search_estimator(stage):
          yield from _traverse_stage(stage.getEstimator())
          yield from _traverse_stage(stage.getEvaluator())
  
  
  def _get_uid_to_indexed_name_map(estimator):
      counter = defaultdict(int)
      uid_to_classname_and_count = {}
      for child in _traverse_stage(estimator):
          class_name = child.__class__.__name__
          counter[class_name] += 1
          uid_to_classname_and_count[child.uid] = (class_name, counter[class_name])
      return {
          uid: f"{class_name}_{count}" if counter[class_name] > 1 else class_name
          for uid, (class_name, count) in uid_to_classname_and_count.items()
      }
  
  
  def _gen_stage_hierarchy_recursively(stage, uid_to_indexed_name_map):
      from pyspark.ml import Pipeline
      from pyspark.ml.classification import OneVsRest
  
      stage_name = uid_to_indexed_name_map[stage.uid]
  
      if isinstance(stage, Pipeline):
          sub_stages = []
          for sub_stage in stage.getStages():
              sub_hierarchy = _gen_stage_hierarchy_recursively(sub_stage, uid_to_indexed_name_map)
              sub_stages.append(sub_hierarchy)
          return {"name": stage_name, "stages": sub_stages}
      elif isinstance(stage, OneVsRest):
          classifier_hierarchy = _gen_stage_hierarchy_recursively(
              stage.getClassifier(), uid_to_indexed_name_map
          )
          return {"name": stage_name, "classifier": classifier_hierarchy}
      elif _is_parameter_search_estimator(stage):
          evaluator = stage.getEvaluator()
          tuned_estimator = stage.getEstimator()
          return {
              "name": stage_name,
              "evaluator": _gen_stage_hierarchy_recursively(evaluator, uid_to_indexed_name_map),
              "tuned_estimator": _gen_stage_hierarchy_recursively(
                  tuned_estimator, uid_to_indexed_name_map
              ),
          }
      else:
          return {"name": stage_name}
  
  
  def _gen_estimator_metadata(estimator):
      """
      Returns an `_AutologgingEstimatorMetadata` object.
      The `_AutologgingEstimatorMetadata` object includes:
       - hierarchy: the hierarchy of the estimator, it will expand
           pipeline/meta estimator/param tuning estimator
       - uid_to_indexed_name_map: a map of `uid` -> `name`, each nested instance uid will be
           mapped to a fixed name. The naming rule is using `{class_name}` if the
           instance type occurs once, or `{class_name}_{index}` if the instance type occurs
           multiple times. The index order is in line with depth-first traversing.
       - param_search_estimators: a list includes all param search estimators in the
           hierarchy tree.
      """
      uid_to_indexed_name_map = _get_uid_to_indexed_name_map(estimator)
      param_search_estimators = [
          stage for stage in _traverse_stage(estimator) if _is_parameter_search_estimator(stage)
      ]
      hierarchy = _gen_stage_hierarchy_recursively(estimator, uid_to_indexed_name_map)
  
      metadata = _AutologgingEstimatorMetadata(
          hierarchy=hierarchy,
          uid_to_indexed_name_map=uid_to_indexed_name_map,
          param_search_estimators=param_search_estimators,
      )
      estimator._autologging_metadata = metadata
  
      return metadata
  
  
  def _get_param_map(instance):
      return {
          param.name: instance.getOrDefault(param)
          for param in instance.params
          if instance.isDefined(param)
      }
  
  
  def _get_instance_param_map_recursively(instance, level, uid_to_indexed_name_map):
      from pyspark.ml.param import Params
      from pyspark.ml.pipeline import Pipeline
  
      param_map = _get_param_map(instance)
      expanded_param_map = {}
  
      is_pipeline = isinstance(instance, Pipeline)
      is_parameter_search_estimator = _is_parameter_search_estimator(instance)
  
      if level == 0:
          logged_param_name_prefix = ""
      else:
          logged_param_name_prefix = uid_to_indexed_name_map[instance.uid] + "."
  
      for param_name, param_value in param_map.items():
          logged_param_name = logged_param_name_prefix + param_name
  
          if is_pipeline and param_name == "stages":
              expanded_param_map[logged_param_name] = [
                  uid_to_indexed_name_map[stage.uid] for stage in instance.getStages()
              ]
              for stage in instance.getStages():
                  stage_param_map = _get_instance_param_map_recursively(
                      stage, level + 1, uid_to_indexed_name_map
                  )
                  expanded_param_map.update(stage_param_map)
          elif is_parameter_search_estimator and param_name == "estimator":
              expanded_param_map[logged_param_name] = uid_to_indexed_name_map[param_value.uid]
              # skip log estimator's nested params because they will be logged as JSON artifact,
              # and they will be logged in nested runs as well.
          elif is_parameter_search_estimator and param_name == "estimatorParamMaps":
              # this param will be saved as JSON format artifact.
              pass
          elif isinstance(param_value, Params):
              # handle the case param value type inherits `pyspark.ml.param.Params`
              # e.g. param like
              # `OneVsRest.classifier`/`CrossValidator.evaluator`
              expanded_param_map[logged_param_name] = uid_to_indexed_name_map[param_value.uid]
              internal_param_map = _get_instance_param_map_recursively(
                  param_value, level + 1, uid_to_indexed_name_map
              )
              expanded_param_map.update(internal_param_map)
          else:
              expanded_param_map[logged_param_name] = param_value
  
      return expanded_param_map
  
  
  def _get_instance_param_map(instance, uid_to_indexed_name_map):
      return _get_instance_param_map_recursively(
          instance, level=0, uid_to_indexed_name_map=uid_to_indexed_name_map
      )
  
  
  def _create_child_runs_for_parameter_search(parent_estimator, parent_model, parent_run, child_tags):
      from itertools import zip_longest
  
      client = MlflowClient()
      # Use the start time of the parent parameter search run as a rough estimate for the
      # start time of child runs, since we cannot precisely determine when each point
      # in the parameter search space was explored
      child_run_start_time = parent_run.info.start_time
      child_run_end_time = int(time.time() * 1000)
  
      estimator_param_maps = parent_estimator.getEstimatorParamMaps()
      tuned_estimator = parent_estimator.getEstimator()
  
      metrics_dict, _ = _get_param_search_metrics_and_best_index(parent_estimator, parent_model)
      for i in range(len(estimator_param_maps)):
          child_estimator = tuned_estimator.copy(estimator_param_maps[i])
          tags_to_log = dict(child_tags) if child_tags else {}
          tags_to_log.update({MLFLOW_PARENT_RUN_ID: parent_run.info.run_id})
          tags_to_log.update(_get_estimator_info_tags(child_estimator))
  
          child_run = client.create_run(
              experiment_id=parent_run.info.experiment_id,
              start_time=child_run_start_time,
              tags=tags_to_log,
          )
  
          params_to_log = _get_instance_param_map(
              child_estimator, parent_estimator._autologging_metadata.uid_to_indexed_name_map
          )
          param_batches_to_log = _chunk_dict(params_to_log, chunk_size=MAX_PARAMS_TAGS_PER_BATCH)
          metrics_to_log = {k: v[i] for k, v in metrics_dict.items()}
          for params_batch, metrics_batch in zip_longest(
              param_batches_to_log, [metrics_to_log], fillvalue={}
          ):
              # Trim any parameter keys / values and metric keys that exceed the limits
              # imposed by corresponding MLflow Tracking APIs (e.g., LogParam, LogMetric)
              truncated_params_batch = _truncate_dict(
                  params_batch, MAX_ENTITY_KEY_LENGTH, MAX_PARAM_VAL_LENGTH
              )
              truncated_metrics_batch = _truncate_dict(
                  metrics_batch, max_key_length=MAX_ENTITY_KEY_LENGTH
              )
              client.log_batch(
                  run_id=child_run.info.run_id,
                  params=[
                      Param(str(key), str(value)) for key, value in truncated_params_batch.items()
                  ],
                  metrics=[
                      Metric(key=str(key), value=value, timestamp=child_run_end_time, step=0)
                      for key, value in truncated_metrics_batch.items()
                  ],
              )
          client.set_terminated(run_id=child_run.info.run_id, end_time=child_run_end_time)
  
  
  def _log_parameter_search_results_as_artifact(param_maps, metrics_dict, run_id):
      import pandas as pd
      import json
  
      result_dict = defaultdict(list)
      result_dict["params"] = []
      result_dict.update(metrics_dict)
      for param_map in param_maps:
          result_dict["params"].append(json.dumps(param_map))
          for param_name, param_value in param_map.items():
              result_dict[f"param.{param_name}"].append(param_value)
  
      results_df = pd.DataFrame.from_dict(result_dict)
      with TempDir() as t:
          results_path = t.path("search_results.csv")
          results_df.to_csv(results_path, index=False)
          MlflowClient().log_artifact(run_id, results_path)
  
  
  def _get_warning_msg_for_fit_call_with_a_list_of_params(estimator):
      return (
          "Skip pyspark ML autologging when calling "
          + f"{_get_fully_qualified_class_name(estimator)}.fit with a list of params,"
          + "if you want to autolog for this case, you convert code to call `fit` with "
          + "each single param map."
      )
  
  
  def _get_tuning_param_maps(param_search_estimator, uid_to_indexed_name_map):
      tuning_param_maps = []
  
      def gen_log_key(param):
          if param.parent not in uid_to_indexed_name_map:
              raise ValueError(
                  "Tuning params should not include params not owned by the tuned estimator, but "
                  f"found a param {param}"
              )
          return f"{uid_to_indexed_name_map[param.parent]}.{param.name}"
  
      for eps in param_search_estimator.getEstimatorParamMaps():
          tuning_param_maps.append({gen_log_key(k): v for k, v in eps.items()})
      return tuning_param_maps
  
  
  def _get_param_search_metrics_and_best_index(param_search_estimator, param_search_model):
      """
      Return a tuple of `(metrics_dict, best_index)`
      `metrics_dict` is a dict of metric_name --> metric_values for each param map
      - For CrossValidatorModel, the result dict contains metrics of avg_metris and std_metrics
        for each param map.
      - For TrainValidationSplitModel, the result dict contains metrics for each param map.
  
      `best_index` is the best index of trials.
      """
      from pyspark.ml.tuning import CrossValidatorModel, TrainValidationSplitModel
  
      metrics_dict = {}
  
      metric_key = param_search_estimator.getEvaluator().getMetricName()
      if isinstance(param_search_model, CrossValidatorModel):
          avg_metrics = param_search_model.avgMetrics
          metrics_dict["avg_" + metric_key] = avg_metrics
          if hasattr(param_search_model, "stdMetrics"):
              metrics_dict["std_" + metric_key] = param_search_model.stdMetrics
      elif isinstance(param_search_model, TrainValidationSplitModel):
          avg_metrics = param_search_model.validationMetrics
          metrics_dict[metric_key] = avg_metrics
      else:
          raise RuntimeError(f"Unknown parameter search model type {type(param_search_model)}.")
  
      if param_search_estimator.getEvaluator().isLargerBetter():
          best_index = np.argmax(avg_metrics)
      else:
          best_index = np.argmin(avg_metrics)
  
      return metrics_dict, best_index
  
  
  def _log_estimator_params(param_map):
      # Chunk model parameters to avoid hitting the log_batch API limit
      for chunk in _chunk_dict(param_map, chunk_size=MAX_PARAMS_TAGS_PER_BATCH):
          truncated = _truncate_dict(chunk, MAX_ENTITY_KEY_LENGTH, MAX_PARAM_VAL_LENGTH)
          mlflow.log_params(truncated)
  
  
  class _AutologgingMetricsManager:
      """
      This class is designed for holding information which is used by autologging metrics
      It will hold information of:
      (1) a map of "prediction result object id" to a tuple of dataset name(the dataset is
         the one which generate the prediction result) and run_id.
         Note: We need this map instead of setting the run_id into the "prediction result object"
         because the object maybe a numpy array which does not support additional attribute
         assignment.
      (2) _log_post_training_metrics_enabled flag, in the following method scope:
         `Estimator.fit`, `Model.transform`, `Evaluator.evaluate`,
         in order to avoid nested/duplicated autologging metric, when run into these scopes,
         we need temporarily disable the metric autologging.
      (3) _eval_dataset_info_map, it is a double level map:
         `_eval_dataset_info_map[run_id][eval_dataset_var_name]` will get a list, each
         element in the list is an id of "eval_dataset" instance.
         This data structure is used for:
          * generating unique dataset name key when autologging metric. For each eval dataset object,
            if they have the same eval_dataset_var_name, but object ids are different,
            then they will be assigned different name (via appending index to the
            eval_dataset_var_name) when autologging.
      (4) _evaluator_call_info, it is a double level map:
         `_metric_api_call_info[run_id][metric_name]` wil get a list of tuples, each tuple is:
           (logged_metric_key, evaluator_information)
          Evaluator information includes evaluator class name and params, these information
          will also be logged into "metric_info.json" artifacts.
  
      Note: this class is not thread-safe.
      Design rule for this class:
       Because this class instance is a global instance, in order to prevent memory leak, it should
       only holds IDs and other small objects references. This class internal data structure should
       avoid reference to user dataset variables or model variables.
      """
  
      def __init__(self):
          self._pred_result_id_to_dataset_name_and_run_id = {}
          self._eval_dataset_info_map = defaultdict(lambda: defaultdict(list))
          self._evaluator_call_info = defaultdict(lambda: defaultdict(list))
          self._log_post_training_metrics_enabled = True
          self._metric_info_artifact_need_update = defaultdict(lambda: False)
  
      def should_log_post_training_metrics(self):
          """
          Check whether we should run patching code for autologging post training metrics.
          This checking should surround the whole patched code due to the safe guard checking,
          See following note.
  
          Note: It includes checking `_SparkTrainingSession.is_active()`, This is a safe guarding
          for meta-estimator (e.g. CrossValidator/TrainValidationSplit) case:
            running CrossValidator.fit, the nested `estimator.fit` will be called in parallel,
            but, the _autolog_training_status is a global status without thread-safe lock protecting.
            This safe guarding will prevent code run into this case.
          """
          return not _SparkTrainingSession.is_active() and self._log_post_training_metrics_enabled
  
      def disable_log_post_training_metrics(self):
          class LogPostTrainingMetricsDisabledScope:
              def __enter__(inner_self):  # pylint: disable=no-self-argument
                  # pylint: disable=attribute-defined-outside-init
                  inner_self.old_status = self._log_post_training_metrics_enabled
                  self._log_post_training_metrics_enabled = False
  
              # pylint: disable=no-self-argument
              def __exit__(inner_self, exc_type, exc_val, exc_tb):
                  self._log_post_training_metrics_enabled = inner_self.old_status
  
          return LogPostTrainingMetricsDisabledScope()
  
      @staticmethod
      def get_run_id_for_model(model):
          return getattr(model, "_mlflow_run_id", None)
  
      @staticmethod
      def is_metric_value_loggable(metric_value):
          """
          check whether the specified `metric_value` is a numeric value which can be logged
          as an MLflow metric.
          """
          return isinstance(metric_value, (int, float, np.number)) and not isinstance(
              metric_value, (bool, np.bool)
          )
  
      def register_model(self, model, run_id):
          """
          In `patched_fit`, we need register the model with the run_id used in `patched_fit`
          So that in following metric autologging, the metric will be logged into the registered
          run_id
          """
          model._mlflow_run_id = run_id
  
      @staticmethod
      def gen_name_with_index(name, index):
          assert index >= 0
          if index == 0:
              return name
          else:
              # Use '-' as the separator between name and index,
              # The '-' is not valid character in python var name
              # so it can prevent name conflicts after appending index.
              return f"{name}-{index + 1}"
  
      def register_prediction_input_dataset(self, model, eval_dataset):
          """
          Register prediction input dataset into eval_dataset_info_map, it will do:
           1. inspect eval dataset var name.
           2. check whether eval_dataset_info_map already registered this eval dataset.
              will check by object id.
           3. register eval dataset with id.
           4. return eval dataset name with index.
  
          Note: this method include inspecting argument variable name.
           So should be called directly from the "patched method", to ensure it capture
           correct argument variable name.
          """
          eval_dataset_name = _inspect_original_var_name(
              eval_dataset, fallback_name="unknown_dataset"
          )
          eval_dataset_id = id(eval_dataset)
  
          run_id = self.get_run_id_for_model(model)
          registered_dataset_list = self._eval_dataset_info_map[run_id][eval_dataset_name]
  
          for i, id_i in enumerate(registered_dataset_list):
              if eval_dataset_id == id_i:
                  index = i
                  break
          else:
              index = len(registered_dataset_list)
  
          if index == len(registered_dataset_list):
              # register new eval dataset
              registered_dataset_list.append(eval_dataset_id)
  
          return self.gen_name_with_index(eval_dataset_name, index)
  
      def register_prediction_result(self, run_id, eval_dataset_name, predict_result):
          """
          Register the relationship
           id(prediction_result) --> (eval_dataset_name, run_id)
          into map `_pred_result_id_to_dataset_name_and_run_id`
          """
          value = (eval_dataset_name, run_id)
          prediction_result_id = id(predict_result)
          self._pred_result_id_to_dataset_name_and_run_id[prediction_result_id] = value
  
          def clean_id(id_):
              _AUTOLOGGING_METRICS_MANAGER._pred_result_id_to_dataset_name_and_run_id.pop(id_, None)
  
          # When the `predict_result` object being GCed, its ID may be reused, so register a finalizer
          # to clear the ID from the dict for preventing wrong ID mapping.
          weakref.finalize(predict_result, clean_id, prediction_result_id)
  
      def get_run_id_and_dataset_name_for_evaluator_call(self, pred_result_dataset):
          """
          Given a registered prediction result dataset object,
          return a tuple of (run_id, eval_dataset_name)
          """
          if id(pred_result_dataset) in self._pred_result_id_to_dataset_name_and_run_id:
              dataset_name, run_id = self._pred_result_id_to_dataset_name_and_run_id[
                  id(pred_result_dataset)
              ]
              return run_id, dataset_name
          else:
              return None, None
  
      def gen_evaluator_info(self, evaluator):
          """
          Generate evaluator information, include evaluator class name and params.
          """
          class_name = _get_fully_qualified_class_name(evaluator)
          param_map = _truncate_dict(
              _get_param_map(evaluator), MAX_ENTITY_KEY_LENGTH, MAX_PARAM_VAL_LENGTH
          )
          return {"evaluator_class": class_name, "params": param_map}
  
      def register_evaluator_call(self, run_id, metric_name, dataset_name, evaluator_info):
          """
          Register the `Evaluator.evaluate` call, including register the evaluator information
          (See doc of `gen_evaluator_info` method) into the corresponding run_id and metric_name
          entry in the registry table.
          """
          evaluator_call_info_list = self._evaluator_call_info[run_id][metric_name]
  
          index = len(evaluator_call_info_list)
          metric_name_with_index = self.gen_name_with_index(metric_name, index)
          metric_key = f"{metric_name_with_index}_{dataset_name}"
  
          evaluator_call_info_list.append((metric_key, evaluator_info))
  
          # Set the flag to true, represent the metric info in this run need update.
          # Later when `log_eval_metric` called, it will generate a new metric_info artifact
          # and overwrite the old artifact.
          self._metric_info_artifact_need_update[run_id] = True
          return metric_key
  
      def log_post_training_metric(self, run_id, key, value):
          """
          Log the metric into the specified mlflow run.
          and it will also update the metric_info artifact if needed.
          """
          # Note: if the case log the same metric key multiple times,
          #  newer value will overwrite old value
          client = mlflow.tracking.MlflowClient()
          client.log_metric(run_id=run_id, key=key, value=value)
          if self._metric_info_artifact_need_update[run_id]:
              evaluator_call_list = []
              for v in self._evaluator_call_info[run_id].values():
                  evaluator_call_list.extend(v)
  
              evaluator_call_list.sort(key=lambda x: x[0])
              dict_to_log = OrderedDict(evaluator_call_list)
              client.log_dict(run_id=run_id, dictionary=dict_to_log, artifact_file="metric_info.json")
              self._metric_info_artifact_need_update[run_id] = False
  
  
  # The global `_AutologgingMetricsManager` instance which holds information used in
  # post-training metric autologging. See doc of class `_AutologgingMetricsManager` for details.
  _AUTOLOGGING_METRICS_MANAGER = _AutologgingMetricsManager()
  
  
  @autologging_integration(AUTOLOGGING_INTEGRATION_NAME)
  def autolog(
      log_models=True,
      disable=False,
      exclusive=False,
      disable_for_unsupported_versions=False,
      silent=False,
      log_post_training_metrics=True,
  ):  # pylint: disable=unused-argument
      """
      Enables (or disables) and configures autologging for pyspark ml estimators.
      This method is not threadsafe.
      This API requires Spark 3.0 or above.
  
      **When is autologging performed?**
        Autologging is performed when you call ``Estimator.fit`` except for estimators (featurizers)
        under ``pyspark.ml.feature``.
  
      **Logged information**
        **Parameters**
          - Parameters obtained by ``estimator.params``. If a param value is also an ``Estimator``,
            then params in the the wrapped estimator will also be logged, the nested param key
            will be `{estimator_uid}.{param_name}`
  
        **Tags**
          - An estimator class name (e.g. "LinearRegression").
          - A fully qualified estimator class name
            (e.g. "pyspark.ml.regression.LinearRegression").
  
        .. _post training metrics:
  
        **Post training metrics**
          When users call evaluator APIs after model training, MLflow tries to capture the
          `Evaluator.evaluate` results and log them as MLflow metrics to the Run associated with
          the model. All pyspark ML evaluators are supported.
  
          For post training metrics autologging, the metric key format is:
          "{metric_name}[-{call_index}]_{dataset_name}"
  
          - The metric name is the name returned by `Evaluator.getMetricName()`
          - If multiple calls are made to the same pyspark ML evaluator metric, each subsequent call
            adds a "call_index" (starting from 2) to the metric key.
          - MLflow uses the prediction input dataset variable name as the "dataset_name" in the
            metric key. The "prediction input dataset variable" refers to the variable which was
            used as the `dataset` argument of `model.transform` call.
            Note: MLflow captures the "prediction input dataset" instance in the outermost call
            frame and fetches the variable name in the outermost call frame. If the "prediction
            input dataset" instance is an intermediate expression without a defined variable
            name, the dataset name is set to "unknown_dataset". If multiple "prediction input
            dataset" instances have the same variable name, then subsequent ones will append an
            index (starting from 2) to the inspected dataset name.
  
          **Limitations**
            - MLflow cannot find run information for other objects derived from a given prediction
              result (e.g. by doing some tranformation on the prediction result dataset).
  
        **Artifacts**
          - An MLflow Model with the :py:mod:`mlflow.spark` flavor containing a fitted estimator
            (logged by :py:func:`mlflow.spark.log_model()`). Note that large models may not be
            autologged for performance and storage space considerations, and autologging for
            Pipelines and hyperparameter tuning meta-estimators (e.g. CrossValidator) is not yet
            supported.
            See ``log_models`` param below for details.
          - For post training metrics API calls, a "metric_info.json" artifact is logged. This is a
            JSON object whose keys are MLflow post training metric names
            (see "Post training metrics" section for the key format) and whose values are the
            corresponding evaluator information, including evaluator class name and evaluator params.
  
      **How does autologging work for meta estimators?**
            When a meta estimator (e.g. `Pipeline`_, `CrossValidator`_, `TrainValidationSplit`_,
            `OneVsRest`_)
            calls ``fit()``, it internally calls ``fit()`` on its child estimators. Autologging
            does NOT perform logging on these constituent ``fit()`` calls.
  
            A "estimator_info.json" artifact is logged, which includes a `hierarchy` entry
            describing the hierarchy of the meta estimator. The hierarchy includes expanded
            entries for all nested stages, such as nested pipeline stages.
  
        **Parameter search**
            In addition to recording the information discussed above, autologging for parameter
            search meta estimators (`CrossValidator`_ and `TrainValidationSplit`_) records child runs
            with metrics for each set of explored parameters, as well as artifacts and parameters
            for the best model and the best parameters (if available).
            For better readability, the "estimatorParamMaps" param in parameter search estimator
            will be recorded inside "estimator_info" artifact, see following description.
            Inside "estimator_info.json" artifact, in addition to the "hierarchy", records 2 more
            items: "tuning_parameter_map_list": a list contains all parameter maps used in tuning,
            and "tuned_estimator_parameter_map": the parameter map of the tuned estimator.
            Records a "best_parameters.json" artifacts, contains the best parameter it searched out.
            Records a "search_results.csv" artifacts, contains search results, it is a table with
            2 columns: "params" and "metric".
  
      .. _OneVsRest:
          https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.ml.classification.OneVsRest.html#pyspark.ml.classification.OneVsRest
      .. _Pipeline:
          https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.ml.Pipeline.html#pyspark.ml.Pipeline
      .. _CrossValidator:
          https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.ml.tuning.CrossValidator.html#pyspark.ml.tuning.CrossValidator
      .. _TrainValidationSplit:
          https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.ml.tuning.TrainValidationSplit.html#pyspark.ml.tuning.TrainValidationSplit
  
      :param log_models: If ``True``, if trained models are in allowlist, they are logged as MLflow
                         model artifacts. If ``False``, trained models are not logged.
                         Note: the built-in allowlist excludes some models (e.g. ALS models) which
                         can be large. To specify a custom allowlist, create a file containing a
                         newline-delimited list of fully-qualified estimator classnames, and set
                         the "spark.mlflow.pysparkml.autolog.logModelAllowlistFile" Spark config
                         to the path of your allowlist file.
      :param disable: If ``True``, disables the scikit-learn autologging integration. If ``False``,
                      enables the pyspark ML autologging integration.
      :param exclusive: If ``True``, autologged content is not logged to user-created fluent runs.
                        If ``False``, autologged content is logged to the active fluent run,
                        which may be user-created.
      :param disable_for_unsupported_versions: If ``True``, disable autologging for versions of
                        pyspark that have not been tested against this version of the MLflow
                        client or are incompatible.
      :param silent: If ``True``, suppress all event logs and warnings from MLflow during pyspark ML
                     autologging. If ``False``, show all events and warnings during pyspark ML
                     autologging.
      :param log_post_training_metrics: If ``True``, post training metrics are logged. Defaults to
                                        ``True``. See the `post training metrics`_ section for more
                                        details.
  
      **The default log model allowlist in mlflow**
          .. literalinclude:: ../../../mlflow/pyspark/ml/log_model_allowlist.txt
             :language: text
      """
      from mlflow.tracking.context import registry as context_registry
      from pyspark.ml.base import Estimator, Model
      from pyspark.ml.evaluation import Evaluator
  
      global _log_model_allowlist
  
      _log_model_allowlist = _read_log_model_allowlist()
  
      def _log_pretraining_metadata(estimator, params):
  
          if params and isinstance(params, dict):
              estimator = estimator.copy(params)
  
          autologging_metadata = _gen_estimator_metadata(estimator)
  
          artifact_dict = {}
  
          param_map = _get_instance_param_map(estimator, autologging_metadata.uid_to_indexed_name_map)
          if _should_log_hierarchy(estimator):
              artifact_dict["hierarchy"] = autologging_metadata.hierarchy
  
          for param_search_estimator in autologging_metadata.param_search_estimators:
              param_search_estimator_name = (
                  f"{autologging_metadata.uid_to_indexed_name_map[param_search_estimator.uid]}"
              )
              artifact_dict[param_search_estimator_name] = {}
  
              artifact_dict[param_search_estimator_name][
                  "tuning_parameter_map_list"
              ] = _get_tuning_param_maps(
                  param_search_estimator, autologging_metadata.uid_to_indexed_name_map
              )
  
              artifact_dict[param_search_estimator_name][
                  "tuned_estimator_parameter_map"
              ] = _get_instance_param_map_recursively(
                  param_search_estimator.getEstimator(),
                  1,
                  autologging_metadata.uid_to_indexed_name_map,
              )
  
          if artifact_dict:
              mlflow.log_dict(artifact_dict, artifact_file="estimator_info.json")
  
          _log_estimator_params(param_map)
  
          mlflow.set_tags(_get_estimator_info_tags(estimator))
  
      def _log_posttraining_metadata(estimator, spark_model, params):
  
          if _is_parameter_search_estimator(estimator):
              try:
                  # Fetch environment-specific tags (e.g., user and source) to ensure that lineage
                  # information is consistent with the parent run
                  child_tags = context_registry.resolve_tags()
                  child_tags.update({MLFLOW_AUTOLOGGING: AUTOLOGGING_INTEGRATION_NAME})
                  _create_child_runs_for_parameter_search(
                      parent_estimator=estimator,
                      parent_model=spark_model,
                      parent_run=mlflow.active_run(),
                      child_tags=child_tags,
                  )
              except Exception:
                  import traceback
  
                  msg = (
                      "Encountered exception during creation of child runs for parameter search."
                      " Child runs may be missing. Exception: {}".format(traceback.format_exc())
                  )
                  _logger.warning(msg)
  
              estimator_param_maps = _get_tuning_param_maps(
                  estimator, estimator._autologging_metadata.uid_to_indexed_name_map
              )
  
              metrics_dict, best_index = _get_param_search_metrics_and_best_index(
                  estimator, spark_model
              )
              _log_parameter_search_results_as_artifact(
                  estimator_param_maps, metrics_dict, mlflow.active_run().info.run_id
              )
  
              # Log best_param_map as JSON artifact
              best_param_map = estimator_param_maps[best_index]
              mlflow.log_dict(best_param_map, artifact_file="best_parameters.json")
  
              # Log best_param_map as autologging parameters as well
              _log_estimator_params(
                  {
                      f"best_{param_name}": param_value
                      for param_name, param_value in best_param_map.items()
                  }
              )
  
          if log_models:
              if _should_log_model(spark_model):
                  # TODO: support model signature
                  mlflow.spark.log_model(
                      spark_model,
                      artifact_path="model",
                  )
                  if _is_parameter_search_model(spark_model):
                      mlflow.spark.log_model(
                          spark_model.bestModel,
                          artifact_path="best_model",
                      )
              else:
                  _logger.warning(_get_warning_msg_for_skip_log_model(spark_model))
  
      def fit_mlflow(original, self, *args, **kwargs):
          params = get_method_call_arg_value(1, "params", None, args, kwargs)
  
          # Do not perform autologging on direct calls to fit() for featurizers.
          # Note that featurizers will be autologged when they're fit as part of a Pipeline.
          if _get_fully_qualified_class_name(self).startswith("pyspark.ml.feature."):
              return original(self, *args, **kwargs)
          elif isinstance(params, (list, tuple)):
              # skip the case params is a list or tuple, this case it will call
              # fitMultiple and return a model iterator
              _logger.warning(_get_warning_msg_for_fit_call_with_a_list_of_params(self))
              return original(self, *args, **kwargs)
          else:
              # we need generate estimator param map so we call `self.copy(params)` to construct
              # an estimator with the extra params.
              estimator = self.copy(params) if params is not None else self
              _log_pretraining_metadata(estimator, params)
              spark_model = original(self, *args, **kwargs)
              _log_posttraining_metadata(estimator, spark_model, params)
              return spark_model
  
      def patched_fit(original, self, *args, **kwargs):
          should_log_post_training_metrics = (
              log_post_training_metrics
              and _AUTOLOGGING_METRICS_MANAGER.should_log_post_training_metrics()
          )
          with _SparkTrainingSession(clazz=self.__class__, allow_children=False) as t:
              if t.should_log():
                  with _AUTOLOGGING_METRICS_MANAGER.disable_log_post_training_metrics():
                      fit_result = fit_mlflow(original, self, *args, **kwargs)
                  # In some cases the `fit_result` may be an iterator of spark models.
                  if should_log_post_training_metrics and isinstance(fit_result, Model):
                      _AUTOLOGGING_METRICS_MANAGER.register_model(
                          fit_result, mlflow.active_run().info.run_id
                      )
                  return fit_result
              else:
                  return original(self, *args, **kwargs)
  
      def patched_transform(original, self, *args, **kwargs):
          run_id = _AUTOLOGGING_METRICS_MANAGER.get_run_id_for_model(self)
          if _AUTOLOGGING_METRICS_MANAGER.should_log_post_training_metrics() and run_id:
              predict_result = original(self, *args, **kwargs)
              eval_dataset = get_method_call_arg_value(0, "dataset", None, args, kwargs)
              eval_dataset_name = _AUTOLOGGING_METRICS_MANAGER.register_prediction_input_dataset(
                  self, eval_dataset
              )
              _AUTOLOGGING_METRICS_MANAGER.register_prediction_result(
                  run_id, eval_dataset_name, predict_result
              )
              return predict_result
          else:
              return original(self, *args, **kwargs)
  
      def patched_evaluate(original, self, *args, **kwargs):
          if _AUTOLOGGING_METRICS_MANAGER.should_log_post_training_metrics():
              with _AUTOLOGGING_METRICS_MANAGER.disable_log_post_training_metrics():
                  metric = original(self, *args, **kwargs)
  
              if _AUTOLOGGING_METRICS_MANAGER.is_metric_value_loggable(metric):
                  params = get_method_call_arg_value(1, "params", None, args, kwargs)
                  # we need generate evaluator param map so we call `self.copy(params)` to construct
                  # an evaluator with the extra evaluation params.
                  evaluator = self.copy(params) if params is not None else self
                  metric_name = evaluator.getMetricName()
                  evaluator_info = _AUTOLOGGING_METRICS_MANAGER.gen_evaluator_info(evaluator)
  
                  pred_result_dataset = get_method_call_arg_value(0, "dataset", None, args, kwargs)
                  (
                      run_id,
                      dataset_name,
                  ) = _AUTOLOGGING_METRICS_MANAGER.get_run_id_and_dataset_name_for_evaluator_call(
                      pred_result_dataset
                  )
                  if run_id and dataset_name:
                      metric_key = _AUTOLOGGING_METRICS_MANAGER.register_evaluator_call(
                          run_id, metric_name, dataset_name, evaluator_info
                      )
                      _AUTOLOGGING_METRICS_MANAGER.log_post_training_metric(
                          run_id, metric_key, metric
                      )
              return metric
          else:
              return original(self, *args, **kwargs)
  
      safe_patch(
          AUTOLOGGING_INTEGRATION_NAME,
          Estimator,
          "fit",
          patched_fit,
          manage_run=True,
      )
  
      if log_post_training_metrics:
          safe_patch(
              AUTOLOGGING_INTEGRATION_NAME,
              Model,
              "transform",
              patched_transform,
              manage_run=False,
          )
          safe_patch(
              AUTOLOGGING_INTEGRATION_NAME,
              Evaluator,
              "evaluate",
              patched_evaluate,
              manage_run=False,
          )
  