142 lines
5.3 KiB
Python
142 lines
5.3 KiB
Python
# ================================================================
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# services/data/app/main.py - FIXED VERSION
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# ================================================================
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"""
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Data Service Main Application - Fixed middleware issue
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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, Request
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import JSONResponse
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from app.core.config import settings
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from app.core.database import init_db
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from app.api.sales import router as sales_router
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from app.api.weather import router as weather_router
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from app.api.traffic import router as traffic_router
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from shared.monitoring import setup_logging, HealthChecker
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from shared.monitoring.metrics import setup_metrics_early
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# Setup logging first
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setup_logging("data-service", settings.LOG_LEVEL)
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logger = logging.getLogger(__name__)
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# Global variables for lifespan access
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metrics_collector = None
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health_checker = None
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# Create FastAPI app FIRST
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app = FastAPI(
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title="Bakery Data Service",
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description="External data integration service for weather, traffic, and sales data",
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version="1.0.0"
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)
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# Setup metrics BEFORE any middleware and BEFORE lifespan
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metrics_collector = setup_metrics_early(app, "data-service")
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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"""Application lifespan events - NO MIDDLEWARE ADDED HERE"""
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global health_checker
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# Startup
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logger.info("Starting Data Service...")
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try:
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# Initialize database
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await init_db()
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logger.info("Database initialized")
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# Register custom metrics (metrics_collector already exists)
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metrics_collector.register_counter("sales_records_created_total", "Total sales records created")
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metrics_collector.register_counter("sales_queries_total", "Sales record queries")
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metrics_collector.register_counter("weather_api_calls_total", "Weather API calls")
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metrics_collector.register_counter("weather_api_success_total", "Successful weather API calls")
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metrics_collector.register_counter("weather_api_failures_total", "Failed weather API calls")
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metrics_collector.register_counter("traffic_api_calls_total", "Traffic API calls")
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metrics_collector.register_counter("import_jobs_total", "Data import jobs")
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metrics_collector.register_counter("template_downloads_total", "Template downloads")
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metrics_collector.register_counter("errors_total", "Total errors")
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metrics_collector.register_histogram("sales_create_duration_seconds", "Sales record creation duration")
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metrics_collector.register_histogram("sales_list_duration_seconds", "Sales record list duration")
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metrics_collector.register_histogram("import_duration_seconds", "Data import duration")
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metrics_collector.register_histogram("weather_current_duration_seconds", "Current weather API duration")
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metrics_collector.register_histogram("weather_forecast_duration_seconds", "Weather forecast API duration")
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metrics_collector.register_histogram("external_api_duration_seconds", "External API call duration")
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# Setup health checker
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health_checker = HealthChecker("data-service")
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# Add database health check
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async def check_database():
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try:
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from app.core.database import get_db
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async for db in get_db():
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await db.execute("SELECT 1")
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return True
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except Exception as e:
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return f"Database error: {e}"
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health_checker.add_check("database", check_database, timeout=5.0, critical=True)
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# Store health checker in app state
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app.state.health_checker = health_checker
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logger.info("Data Service started successfully")
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except Exception as e:
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logger.error(f"Failed to start Data Service: {e}")
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raise
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yield
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# Shutdown
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logger.info("Shutting down Data Service...")
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# Set lifespan AFTER metrics setup
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app.router.lifespan_context = lifespan
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# CORS middleware (added after metrics setup)
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app.add_middleware(
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CORSMiddleware,
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allow_origins=getattr(settings, 'CORS_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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# Include routers
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app.include_router(sales_router, prefix="/api/v1/sales", tags=["sales"])
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app.include_router(weather_router, prefix="/api/v1/weather", tags=["weather"])
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app.include_router(traffic_router, prefix="/api/v1/traffic", tags=["traffic"])
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# Health check endpoint
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@app.get("/health")
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async def health_check():
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"""Comprehensive health check endpoint"""
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if health_checker:
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return await health_checker.check_health()
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else:
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return {
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"service": "data-service",
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"status": "healthy",
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"version": "1.0.0"
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}
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# Exception handlers
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@app.exception_handler(Exception)
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async def global_exception_handler(request: Request, exc: Exception):
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"""Global exception handler with metrics"""
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logger.error(f"Unhandled exception: {exc}", exc_info=True)
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# Record error metric if available
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if metrics_collector:
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metrics_collector.increment_counter("errors_total", labels={"type": "unhandled"})
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return JSONResponse(
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status_code=500,
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content={"detail": "Internal server error"}
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) |