Release 2025-05-19
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"""
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Base task module for the pyworker package.
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"""
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from abc import ABC, abstractmethod
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from contextlib import AbstractContextManager
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from typing import Any, Optional, Type
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from pyworker.database import get_db_connection
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from pyworker.utils.app_logging import setup_logging
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logger = setup_logging(__name__)
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class Task(ABC):
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"""Base class for all worker tasks."""
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def __init__(self, name: str):
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"""
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Initialize a task.
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Args:
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name: The name of the task.
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"""
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self.name = name
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self.logger = setup_logging(f"pyworker.task.{name}")
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self.conn: Optional[Any] = None
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self._context: Optional[AbstractContextManager[Any]] = None
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def __enter__(self):
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"""Enter context manager, acquiring a database connection."""
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self._context = get_db_connection()
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self.conn = self._context.__enter__()
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return self
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def __exit__(
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self,
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exc_type: Optional[Type[BaseException]],
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exc_val: Optional[BaseException],
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exc_tb: Optional[Any],
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) -> Optional[bool]:
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"""Exit context manager, releasing the database connection."""
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if self._context:
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return self._context.__exit__(exc_type, exc_val, exc_tb)
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return None
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@abstractmethod
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def run(self, *args: Any, **kwargs: Any) -> Any:
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"""
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Run the task.
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This method must be implemented by subclasses.
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Args:
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*args: Variable length argument list.
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**kwargs: Arbitrary keyword arguments.
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Returns:
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The result of the task.
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"""
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pass
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def __str__(self) -> str:
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return f"{self.__class__.__name__}(name={self.name})"
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