64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
from sqlalchemy import create_engine, event
|
|
from sqlalchemy.ext.declarative import declarative_base
|
|
from sqlalchemy.orm import sessionmaker
|
|
from sqlalchemy.pool import QueuePool
|
|
from .settings import settings
|
|
from .logging_config import get_logger
|
|
|
|
logger = get_logger(__name__)
|
|
|
|
# Database configuration using settings
|
|
DATABASE_URL = settings.database_url
|
|
|
|
# Enhanced engine configuration for enterprise use
|
|
engine = create_engine(
|
|
DATABASE_URL,
|
|
poolclass=QueuePool,
|
|
pool_pre_ping=True, # Verify connections before using
|
|
pool_recycle=3600, # Recycle connections after 1 hour
|
|
pool_size=10, # Number of connections to maintain
|
|
max_overflow=20, # Additional connections beyond pool_size
|
|
echo=settings.is_development, # Log SQL queries in development
|
|
future=True, # Use SQLAlchemy 2.0 style
|
|
connect_args={
|
|
"charset": "utf8mb4",
|
|
"connect_timeout": 10
|
|
}
|
|
)
|
|
|
|
# Event listeners for connection pool monitoring
|
|
@event.listens_for(engine, "connect")
|
|
def set_sqlite_pragma(dbapi_conn, connection_record):
|
|
"""Set connection-level settings"""
|
|
logger.debug("New database connection established")
|
|
|
|
@event.listens_for(engine, "checkout")
|
|
def receive_checkout(dbapi_conn, connection_record, connection_proxy):
|
|
"""Log connection checkout"""
|
|
logger.debug("Connection checked out from pool")
|
|
|
|
@event.listens_for(engine, "checkin")
|
|
def receive_checkin(dbapi_conn, connection_record):
|
|
"""Log connection checkin"""
|
|
logger.debug("Connection returned to pool")
|
|
|
|
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
|
|
|
|
Base = declarative_base()
|
|
|
|
# Dependency to get DB session
|
|
def get_db():
|
|
"""
|
|
Dependency for getting database session.
|
|
Automatically handles session lifecycle.
|
|
"""
|
|
db = SessionLocal()
|
|
try:
|
|
yield db
|
|
except Exception:
|
|
db.rollback()
|
|
raise
|
|
finally:
|
|
db.close()
|
|
|