12c4e1ca9c
Completed Tasks (T027-T032): - ✅ FastAPI application with structured logging, CORS, global error handlers - ✅ Pydantic Settings for environment configuration - ✅ SQLAlchemy async engine with session management - ✅ Alembic migration environment setup - ✅ Redis async client with connection pooling - ✅ gRPC SDK Bridge client (placeholder - awaiting protobuf generation) Next: JWT utilities, middleware, database models 🤖 Generated with Claude Code
70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
"""
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SQLAlchemy database setup with async support
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"""
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from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
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from sqlalchemy.orm import DeclarativeBase
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from config import settings
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import structlog
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logger = structlog.get_logger()
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# Create async engine
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engine = create_async_engine(
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settings.DATABASE_URL,
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echo=settings.ENVIRONMENT == "development",
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pool_size=settings.DATABASE_POOL_SIZE,
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max_overflow=settings.DATABASE_MAX_OVERFLOW,
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pool_pre_ping=True, # Verify connections before using
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)
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# Create async session factory
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AsyncSessionLocal = async_sessionmaker(
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engine,
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class_=AsyncSession,
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expire_on_commit=False,
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)
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# Base class for models
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class Base(DeclarativeBase):
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"""Base class for all database models"""
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pass
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# Dependency for FastAPI routes
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async def get_db() -> AsyncSession:
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"""
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Dependency that provides database session to FastAPI routes
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Usage: db: AsyncSession = Depends(get_db)
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"""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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await session.commit()
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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# Database initialization
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async def init_db():
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"""Initialize database connection (call on startup)"""
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try:
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logger.info("database_init", url=settings.DATABASE_URL.split("@")[-1]) # Hide credentials
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async with engine.begin() as conn:
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# Test connection
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await conn.run_sync(lambda _: None)
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logger.info("database_connected")
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except Exception as e:
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logger.error("database_connection_failed", error=str(e))
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raise
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async def close_db():
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"""Close database connections (call on shutdown)"""
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try:
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logger.info("database_closing")
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await engine.dispose()
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logger.info("database_closed")
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except Exception as e:
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logger.error("database_close_failed", error=str(e))
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raise
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