220 lines
8.1 KiB
Python
220 lines
8.1 KiB
Python
"""
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Training activities for ML model training operations.
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This module provides activities for training machine learning models.
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The activity extends BaseActivity and receives pre-downloaded files
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to return success/failure status without raising exceptions.
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"""
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from temporalio import activity, workflow
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with workflow.unsafe.imports_passed_through():
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import traceback
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from typing import Any
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from sientia_do.notifications.handlers import CoreNotificationHandler as NotificationHandler
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from sientia_do.notifications.models import NotificationLevel
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from sientia_do.observability.logger import Logger
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from sientia_do.observability.metrics_controller import MetricsController
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from sientia_do.observability.sientia_monitoring import SientiaMonitoring
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from model_manager.utils.exceptions import ModelTrainingError
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from model_manager.utils.models.train_model_params import TrainModelParams
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from model_manager.utils.repository.model_repository import ModelRepository
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from model_manager.utils.repository.storage_repository import StorageRepository
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from model_manager.utils.repository.training_repository import TrainingRepository
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class Training(SientiaMonitoring):
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"""
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Activity for ML model training operations.
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This activity extends SientiaMonitoring and handles machine learning model
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training with comprehensive error handling. It receives pre-downloaded
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files from the workflow and returns success/failure status without
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raising exceptions.
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"""
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def __init__(
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self,
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model_repository: ModelRepository,
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storage_repository: StorageRepository,
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logger: Logger,
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notification_handler: NotificationHandler,
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metrics_controller: MetricsController,
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):
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"""
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Initialize Training activity.
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Args:
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logger: Logger instance for observability
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notification_handler: Handler for sending notifications
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"""
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super().__init__(logger, notification_handler, metrics_controller, set_error_counter=True)
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self.training_repository = TrainingRepository(logger)
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self.model_repository = model_repository
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self.storage_repository = storage_repository
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@activity.defn(name='validate_train_params')
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async def validate_train_params(self, input_data: dict[str, Any]) -> TrainModelParams:
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"""
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Validate and convert training parameters from dict to TrainModelParams.
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This activity validates the input training parameters and converts them
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to a TrainModelParams object.
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Args:
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input_data: Training parameters and metadata at the same level
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Required keys:
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- metadata (dict): Workflow execution metadata
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- All TrainModelParams fields (experiment_run_id, target_variable, etc.)
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Returns:
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TrainModelParams: Validated and converted training parameters
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Raises:
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ValueError, TypeError, KeyError: If validation fails (after sending notification)
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"""
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metadata = input_data.get('metadata', {})
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try:
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train_params = TrainModelParams.from_dict(input_data)
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train_params.validate_business_rules()
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self.info(
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f'Training parameters validated successfully - '
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f'Target: {train_params.target_variable}, '
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f'Experiment: {train_params.experiment_name}',
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metadata,
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)
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return train_params
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except (ValueError, TypeError, KeyError) as e:
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error_msg = f'Error validating training parameters: {str(e)}'
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trace = traceback.format_exc()
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self.send_notification(
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metadata=metadata,
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notification_id='VALIDATE_TRAIN_PARAMS_ERROR',
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message=error_msg,
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block='validate_train_params',
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level=NotificationLevel.ERROR,
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attachment_content=trace,
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)
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raise
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@activity.defn(name='train_model')
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async def train_model(self, input_data: dict[str, Any]) -> dict[str, str | None]:
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"""
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Train a machine learning model.
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This activity orchestrates the ML training pipeline:
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1. Validate input parameters.
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2. Train the model via TrainingRepository.
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3. Perform post-training calculations.
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Args:
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input_data: Training configuration containing:
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- metadata (dict): Workflow execution metadata.
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- uploaded_file (BytesIO): Training data already downloaded from MinIO.
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- train_params (TrainModelParams | dict): Training parameters.
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Returns:
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dict: Keys `run_name` and `run_dir` when training and saving succeed.
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Raises:
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ValueError: If input validation fails.
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Exception: If training fails (after sending notification).
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"""
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metadata = input_data.get('metadata', {})
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train_params = input_data['train_params']
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if isinstance(train_params, dict):
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train_params = TrainModelParams.from_dict(train_params)
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# type: ignore[assignment]
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model_trained = False
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model_saved = False
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try:
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with self.storage_repository.fetch_file(
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train_params.bucket_name, train_params.file_name
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) as uploaded_file:
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train_result = self.training_repository.train(uploaded_file, train_params)
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train_result = self.training_repository.after_train_calculation(
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train_params, train_result
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)
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model_trained = True
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train_result = self.model_repository.save_model(train_result)
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model_saved = True
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return {
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'run_name': train_result.run_name,
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'run_dir': train_result.run_dir,
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}
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except Exception as e: # noqa: BLE001
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error_msg = (
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'Error training model - '
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f'model_trained={model_trained}, model_saved={model_saved}, '
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f'error: {str(e)}'
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)
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trace = traceback.format_exc()
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self.send_notification(
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metadata=metadata,
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notification_id='TRAIN_MODEL_ERROR',
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message=error_msg,
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block='train_model',
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level=NotificationLevel.ERROR,
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attachment_content=trace,
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)
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raise ModelTrainingError(
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model_trained=model_trained,
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model_saved=model_saved,
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) from e
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@activity.defn(name='cleanup_resources')
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async def cleanup_resources(self, input_data: dict[str, Any]) -> None:
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"""
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Cleanup temporary resources created during training.
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Args:
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input_data: Cleanup configuration containing:
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- metadata (dict): Workflow execution metadata.
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- run_dir (str): Temporary directory to remove.
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- bucket_name (str): MinIO bucket of the uploaded file.
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- file_name (str): MinIO object key to delete.
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Raises:
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Exception: If cleanup fails (after sending notification).
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"""
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metadata = input_data.get('metadata', {})
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run_dir = input_data.get('run_dir', '')
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bucket_name = input_data.get('bucket_name', '')
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file_name = input_data.get('file_name', '')
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try:
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self.model_repository.cleanup_run_directory(run_dir)
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self.storage_repository.delete_file(bucket_name, file_name)
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except Exception as e: # noqa: BLE001
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error_msg = (
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f'Error cleaning up resources - Run directory: {run_dir}, '
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f'File: {bucket_name}/{file_name}, Error: {str(e)}'
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)
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trace = traceback.format_exc()
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self.send_notification(
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metadata=metadata,
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notification_id='CLEANUP_RESOURCES_ERROR',
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message=error_msg,
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block='cleanup_resources',
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level=NotificationLevel.ERROR,
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attachment_content=trace,
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)
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raise
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