first commit - MVE Incrementables Parser microservice with FastAPI, JWT, Celery, Redis

app/main.py

@@ -0,0 +1,90 @@
+"""Main FastAPI application."""
+import logging
+import sys
+from fastapi import FastAPI, Request, status
+from fastapi.responses import JSONResponse
+from fastapi.exceptions import RequestValidationError
+from contextlib import asynccontextmanager
+
+from app.core.config import get_settings
+from app.api import auth
+from app.api.v1 import incrementables
+from app.schemas import HealthResponse
+
+# Configure logging
+settings = get_settings()
+logging.basicConfig(
+    level=getattr(logging, settings.log_level.upper()),
+    format='{"time": "%(asctime)s", "level": "%(levelname)s", "name": "%(name)s", "message": "%(message)s"}',
+    stream=sys.stdout
+)
+
+logger = logging.getLogger(__name__)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Application lifespan manager."""
+    logger.info(f"Starting {settings.service_name} v{settings.service_version}")
+    yield
+    logger.info(f"Shutting down {settings.service_name}")
+
+
+# Create FastAPI app
+app = FastAPI(
+    title=settings.service_name,
+    version=settings.service_version,
+    description="MVE Incrementables Parser - Extracts incrementables data from PDFs",
+    lifespan=lifespan
+)
+
+
+# Exception handlers
+@app.exception_handler(RequestValidationError)
+async def validation_exception_handler(request: Request, exc: RequestValidationError):
+    """Handle validation errors with custom format."""
+    logger.warning(f"Validation error: {exc.errors()}")
+    return JSONResponse(
+        status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+        content={
+            "detail": "Validation error",
+            "errors": exc.errors()
+        }
+    )
+
+
+@app.exception_handler(Exception)
+async def general_exception_handler(request: Request, exc: Exception):
+    """Handle unexpected errors."""
+    logger.error(f"Unexpected error: {str(exc)}", exc_info=True)
+    return JSONResponse(
+        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+        content={
+            "detail": "Internal server error"
+        }
+    )
+
+
+# Health check endpoint
+@app.get("/health", response_model=HealthResponse, tags=["Health"])
+async def health_check():
+    """
+    Health check endpoint.
+    
+    Returns service status and version information.
+    """
+    return HealthResponse(
+        status="ok",
+        service=settings.service_name,
+        version=settings.service_version
+    )
+
+
+# Include routers
+app.include_router(auth.router)
+app.include_router(incrementables.router)
+
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=9876)