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| Original file line number | Diff line number | Diff line change |
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| ###################################################################################################################### | ||
| # Copyright (C) 2017-2022 Spine project consortium | ||
| # Copyright Spine Toolbox contributors | ||
| # This file is part of Spine Toolbox. | ||
| # Spine Toolbox is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General | ||
| # Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) | ||
| # any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; | ||
| # without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General | ||
| # Public License for more details. You should have received a copy of the GNU Lesser General Public License along with | ||
| # this program. If not, see <http://www.gnu.org/licenses/>. | ||
| ###################################################################################################################### | ||
| """Contains utilities for validating parameter types.""" | ||
| from dataclasses import dataclass | ||
| from multiprocessing import Pipe, Process | ||
| from typing import Any, Iterable, Optional, Tuple | ||
| from PySide6.QtCore import QObject, QTimer, Signal, Slot | ||
| from spinedb_api.db_mapping_helpers import is_parameter_type_valid, type_check_args | ||
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| CHUNK_SIZE = 20 | ||
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| @dataclass(frozen=True) | ||
| class ValidationKey: | ||
| item_type: str | ||
| db_map_id: int | ||
| item_private_id: int | ||
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| @dataclass(frozen=True) | ||
| class ValidatableValue: | ||
| key: ValidationKey | ||
| args: Tuple[Iterable[str], Optional[bytes], Optional[Any], Optional[str]] | ||
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| class ParameterTypeValidator(QObject): | ||
| """Handles parameter type validation in a concurrent process.""" | ||
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| validated = Signal(ValidationKey, bool) | ||
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| def __init__(self, parent=None): | ||
| """ | ||
| Args: | ||
| parent (QObject, optional): parent object | ||
| """ | ||
| super().__init__(parent) | ||
| self._connection, scheduler_connection = Pipe() | ||
| self._process = Process(target=schedule, name="Type validation worker", args=(scheduler_connection,)) | ||
| self._timer = QTimer(self) | ||
| self._timer.setInterval(100) | ||
| self._timer.timeout.connect(self._communicate) | ||
| self._task_queue = [] | ||
| self._sent_task_count = 0 | ||
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| def set_interval(self, interval): | ||
| """Sets the interval between communication attempts with the validation process. | ||
| Args: | ||
| interval (int): interval in milliseconds | ||
| """ | ||
| self._timer.setInterval(interval) | ||
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| def start_validating(self, db_mngr, db_map, value_item_ids): | ||
| """Initiates validation of given parameter definition/value items. | ||
| Args: | ||
| db_mngr (SpineDBManager): database manager | ||
| db_map (DatabaseMapping): database mapping | ||
| value_item_ids (Iterable of TempId): item ids to validate | ||
| """ | ||
| if not self._process.is_alive(): | ||
| self._process.start() | ||
| for item_id in value_item_ids: | ||
| item = db_mngr.get_item(db_map, item_id.item_type, item_id) | ||
| args = type_check_args(item) | ||
| self._task_queue.append( | ||
| ValidatableValue(ValidationKey(item_id.item_type, id(db_map), item_id.private_id), args) | ||
| ) | ||
| self._sent_task_count += 1 | ||
| if not self._timer.isActive(): | ||
| chunk = self._task_queue[:CHUNK_SIZE] | ||
| self._task_queue = self._task_queue[CHUNK_SIZE:] | ||
| self._connection.send(chunk) | ||
| self._timer.start() | ||
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| @Slot() | ||
| def _communicate(self): | ||
| """Communicates with the validation process.""" | ||
| self._timer.stop() | ||
| if self._connection.poll(): | ||
| results = self._connection.recv() | ||
| for key, result in results.items(): | ||
| self.validated.emit(key, result) | ||
| self._sent_task_count -= len(results) | ||
| if self._task_queue and self._sent_task_count < 3 * CHUNK_SIZE: | ||
| chunk = self._task_queue[:CHUNK_SIZE] | ||
| self._task_queue = self._task_queue[CHUNK_SIZE:] | ||
| self._connection.send(chunk) | ||
| if not self._task_queue and self._sent_task_count == 0: | ||
| return | ||
| self._timer.start() | ||
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| def tear_down(self): | ||
| """Cleans up the validation process.""" | ||
| self._timer.stop() | ||
| if self._process.is_alive(): | ||
| self._connection.send("quit") | ||
| self._process.join() | ||
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| def validate_chunk(validatable_values): | ||
| """Validates given parameter definitions/values. | ||
| Args: | ||
| validatable_values (Iterable of ValidatableValue): values to validate | ||
| Returns: | ||
| dict: mapping from ValidationKey to boolean | ||
| """ | ||
| results = {} | ||
| for validatable_value in validatable_values: | ||
| results[validatable_value.key] = is_parameter_type_valid(*validatable_value.args) | ||
| return results | ||
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| def schedule(connection): | ||
| """Loops over incoming messages and sends responses back. | ||
| Args: | ||
| connection (Connection): A duplex Pipe end | ||
| """ | ||
| validatable_values = [] | ||
| while True: | ||
| if connection.poll() or not validatable_values: | ||
| while True: | ||
| task = connection.recv() | ||
| if task == "quit": | ||
| return | ||
| validatable_values += task | ||
| if not connection.poll(): | ||
| break | ||
| chunk = validatable_values[:CHUNK_SIZE] | ||
| validatable_values = validatable_values[CHUNK_SIZE:] | ||
| results = validate_chunk(chunk) | ||
| connection.send(results) |
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