134 lines
3.2 KiB
Python
134 lines
3.2 KiB
Python
"""
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FastAPI 应用主入口
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"""
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import logging
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from contextlib import asynccontextmanager
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from fastapi import FastAPI
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from fastapi.middleware.cors import CORSMiddleware
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from app.config import settings
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from app.api import api_router
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from app.core.database import mysql_db, mongodb, redis_db
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# 配置日志
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logging.basicConfig(
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level=logging.INFO if settings.DEBUG else logging.WARNING,
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format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
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)
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logger = logging.getLogger(__name__)
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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"""
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应用生命周期管理
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启动时: 初始化数据库连接
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关闭时: 关闭数据库连接
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"""
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# 启动时
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logger.info("正在初始化数据库连接...")
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# 初始化 MySQL
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try:
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await mysql_db.init_db()
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logger.info("✓ MySQL 初始化成功")
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except Exception as e:
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logger.error(f"✗ MySQL 初始化失败: {e}")
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# 初始化 MongoDB
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try:
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await mongodb.connect()
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await mongodb.create_indexes()
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logger.info("✓ MongoDB 初始化成功")
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except Exception as e:
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logger.error(f"✗ MongoDB 初始化失败: {e}")
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# 初始化 Redis
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try:
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await redis_db.connect()
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logger.info("✓ Redis 初始化成功")
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except Exception as e:
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logger.error(f"✗ Redis 初始化失败: {e}")
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logger.info("数据库初始化完成")
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yield
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# 关闭时
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logger.info("正在关闭数据库连接...")
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await mysql_db.close()
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await mongodb.close()
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await redis_db.close()
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logger.info("数据库连接已关闭")
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# 创建 FastAPI 应用实例
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app = FastAPI(
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title=settings.APP_NAME,
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description="基于大语言模型的文档理解与多源数据融合系统",
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version="1.0.0",
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openapi_url=f"{settings.API_V1_STR}/openapi.json",
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docs_url=f"{settings.API_V1_STR}/docs",
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redoc_url=f"{settings.API_V1_STR}/redoc",
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lifespan=lifespan, # 添加生命周期管理
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)
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# 配置 CORS 中间件
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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# 注册 API 路由
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app.include_router(api_router, prefix=settings.API_V1_STR)
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@app.get("/")
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async def root():
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"""根路径"""
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return {
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"message": f"Welcome to {settings.APP_NAME}",
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"status": "online",
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"version": "1.0.0",
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"debug_mode": settings.DEBUG,
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"api_docs": f"{settings.API_V1_STR}/docs"
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}
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@app.get("/health")
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async def health_check():
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"""
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健康检查接口
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返回各数据库连接状态
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"""
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# 检查各数据库连接状态
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mysql_status = "connected" if mysql_db.async_engine else "disconnected"
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mongodb_status = "connected" if mongodb.client else "disconnected"
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redis_status = "connected" if redis_db.is_connected else "disconnected"
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return {
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"status": "healthy",
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"service": settings.APP_NAME,
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"databases": {
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"mysql": mysql_status,
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"mongodb": mongodb_status,
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"redis": redis_status,
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}
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}
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if __name__ == "__main__":
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import uvicorn
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uvicorn.run(
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"app.main:app",
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host="127.0.0.1",
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port=8000,
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reload=settings.DEBUG
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)
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