mirror of
https://github.com/invoke-ai/InvokeAI
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c5ba4f2ea5
Instead of mucking about with the filesystem, we rely on SQLite transactions to handle failed migrations.
68 lines
2.8 KiB
Python
68 lines
2.8 KiB
Python
import sqlite3
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import threading
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from logging import Logger
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from pathlib import Path
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from invokeai.app.services.shared.sqlite.sqlite_common import sqlite_memory
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class SqliteDatabase:
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"""
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Manages a connection to an SQLite database.
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:param db_path: Path to the database file. If None, an in-memory database is used.
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:param logger: Logger to use for logging.
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:param verbose: Whether to log SQL statements. Provides `logger.debug` as the SQLite trace callback.
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This is a light wrapper around the `sqlite3` module, providing a few conveniences:
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- The database file is written to disk if it does not exist.
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- Foreign key constraints are enabled by default.
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- The connection is configured to use the `sqlite3.Row` row factory.
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In addition to the constructor args, the instance provides the following attributes and methods:
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- `conn`: A `sqlite3.Connection` object. Note that the connection must never be closed if the database is in-memory.
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- `lock`: A shared re-entrant lock, used to approximate thread safety.
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- `clean()`: Runs the SQL `VACUUM;` command and reports on the freed space.
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"""
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def __init__(self, db_path: Path | None, logger: Logger, verbose: bool = False) -> None:
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"""Initializes the database. This is used internally by the class constructor."""
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self.logger = logger
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self.db_path = db_path
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self.verbose = verbose
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if not self.db_path:
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logger.info("Initializing in-memory database")
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else:
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self.db_path.parent.mkdir(parents=True, exist_ok=True)
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self.logger.info(f"Initializing database at {self.db_path}")
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self.conn = sqlite3.connect(database=self.db_path or sqlite_memory, check_same_thread=False)
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self.lock = threading.RLock()
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self.conn.row_factory = sqlite3.Row
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if self.verbose:
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self.conn.set_trace_callback(self.logger.debug)
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self.conn.execute("PRAGMA foreign_keys = ON;")
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def clean(self) -> None:
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"""
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Cleans the database by running the VACUUM command, reporting on the freed space.
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"""
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# No need to clean in-memory database
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if not self.db_path:
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return
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with self.lock:
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try:
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initial_db_size = Path(self.db_path).stat().st_size
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self.conn.execute("VACUUM;")
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self.conn.commit()
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final_db_size = Path(self.db_path).stat().st_size
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freed_space_in_mb = round((initial_db_size - final_db_size) / 1024 / 1024, 2)
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if freed_space_in_mb > 0:
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self.logger.info(f"Cleaned database (freed {freed_space_in_mb}MB)")
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except Exception as e:
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self.logger.error(f"Error cleaning database: {e}")
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raise
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