44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
from __future__ import annotations
|
|
|
|
import sqlite3
|
|
from collections.abc import Iterator
|
|
from contextlib import contextmanager
|
|
from dataclasses import dataclass
|
|
from pathlib import Path
|
|
|
|
|
|
@dataclass(frozen=True, slots=True)
|
|
class Database:
|
|
path: Path
|
|
timeout_seconds: float = 20.0
|
|
|
|
def connect(self) -> sqlite3.Connection:
|
|
self.path.parent.mkdir(parents=True, exist_ok=True)
|
|
connection = sqlite3.connect(self.path, timeout=self.timeout_seconds)
|
|
connection.row_factory = sqlite3.Row
|
|
connection.execute("PRAGMA foreign_keys = ON")
|
|
connection.execute("PRAGMA journal_mode = WAL")
|
|
connection.execute(f"PRAGMA busy_timeout = {int(self.timeout_seconds * 1000)}")
|
|
return connection
|
|
|
|
@contextmanager
|
|
def read(self) -> Iterator[sqlite3.Connection]:
|
|
connection = self.connect()
|
|
try:
|
|
yield connection
|
|
finally:
|
|
connection.close()
|
|
|
|
@contextmanager
|
|
def transaction(self) -> Iterator[sqlite3.Connection]:
|
|
connection = self.connect()
|
|
try:
|
|
connection.execute("BEGIN IMMEDIATE")
|
|
yield connection
|
|
connection.commit()
|
|
except Exception:
|
|
connection.rollback()
|
|
raise
|
|
finally:
|
|
connection.close()
|