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Running on Zero
Running on Zero
File size: 1,850 Bytes
b106f38 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | """FastAPI Application Main Entrypoint.
Exposes REST APIs for health checking, document upload/indexing, and RAG queries.
"""
from contextlib import asynccontextmanager
import logging
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from app.api.routes_health import router as health_router
from app.api.routes_query import router as query_router
from app.api.routes_upload import router as upload_router
from app.config import get_settings, setup_logging
from app.state import get_app_state
logger = logging.getLogger(__name__)
@asynccontextmanager
async def lifespan(app: FastAPI):
"""Application lifespan context: initialize logging and warm up services on startup."""
settings = get_settings()
setup_logging(settings.log_level)
logger.info("Initializing PDF Knowledge Assistant API server...")
# Trigger lazy singleton initialization
state = get_app_state()
logger.info("Services ready. Vector store contains %d chunks.", state.vector_store.total_chunks())
yield
logger.info("Shutting down PDF Knowledge Assistant API server.")
app = FastAPI(
title="📚 PDF Knowledge Assistant API",
description="Production-grade Retrieval-Augmented Generation (RAG) backend for PDF documents.",
version="1.0.0",
lifespan=lifespan,
)
# Enable CORS for frontend and development origins
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
# Register route modules
app.include_router(health_router)
app.include_router(upload_router)
app.include_router(query_router)
if __name__ == "__main__":
import uvicorn
settings = get_settings()
uvicorn.run(
"app.main:app",
host=settings.app_host,
port=settings.app_port,
reload=False,
)
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