Add notification service
This commit is contained in:
Urtzi Alfaro
@@ -1,61 +1,186 @@
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# ================================================================
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# services/notification/app/main.py - COMPLETE IMPLEMENTATION
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# ================================================================
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"""
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uLunotification Service
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Notification Service Main Application
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Handles email and WhatsApp notifications with full integration
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"""
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import structlog
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from fastapi import FastAPI
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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 database_manager
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from shared.monitoring.logging import setup_logging
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from shared.monitoring.metrics import MetricsCollector
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from app.core.database import init_db
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from app.api.notifications import router as notification_router
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from app.services.messaging import setup_messaging, cleanup_messaging
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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
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setup_logging("notification-service", "INFO")
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# Setup logging first
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setup_logging("notification-service", settings.LOG_LEVEL)
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logger = structlog.get_logger()
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# Create FastAPI app
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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="uLunotification Service",
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description="uLunotification service for bakery forecasting",
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version="1.0.0"
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title="Bakery Notification Service",
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description="Email and WhatsApp notification service for bakery forecasting platform",
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version="1.0.0",
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docs_url="/docs",
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redoc_url="/redoc"
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)
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# Initialize metrics collector
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metrics_collector = MetricsCollector("notification-service")
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# Setup metrics BEFORE any middleware and BEFORE lifespan
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metrics_collector = setup_metrics_early(app, "notification-service")
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# CORS middleware
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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 Notification 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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# Setup messaging
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await setup_messaging()
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logger.info("Messaging initialized")
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# Register custom metrics (metrics_collector already exists)
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metrics_collector.register_counter("notifications_sent_total", "Total notifications sent", labels=["type", "status"])
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metrics_collector.register_counter("emails_sent_total", "Total emails sent", labels=["status"])
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metrics_collector.register_counter("whatsapp_sent_total", "Total WhatsApp messages sent", labels=["status"])
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metrics_collector.register_histogram("notification_processing_duration_seconds", "Time spent processing notifications")
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metrics_collector.register_gauge("notification_queue_size", "Current notification queue size")
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# Setup health checker
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health_checker = HealthChecker("notification-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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# Add email service health check
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async def check_email_service():
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try:
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from app.services.email_service import EmailService
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email_service = EmailService()
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return await email_service.health_check()
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except Exception as e:
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return f"Email service error: {e}"
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health_checker.add_check("email_service", check_email_service, timeout=10.0, critical=True)
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# Add WhatsApp service health check
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async def check_whatsapp_service():
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try:
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from app.services.whatsapp_service import WhatsAppService
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whatsapp_service = WhatsAppService()
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return await whatsapp_service.health_check()
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except Exception as e:
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return f"WhatsApp service error: {e}"
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health_checker.add_check("whatsapp_service", check_whatsapp_service, timeout=10.0, critical=False)
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# Add messaging health check
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def check_messaging():
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try:
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# Check if messaging is properly initialized
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from app.services.messaging import notification_publisher
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return notification_publisher.connected if notification_publisher else False
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except Exception as e:
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return f"Messaging error: {e}"
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health_checker.add_check("messaging", check_messaging, timeout=3.0, critical=False)
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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("Notification Service started successfully")
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except Exception as e:
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logger.error(f"Failed to start Notification 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 Notification Service...")
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try:
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await cleanup_messaging()
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logger.info("Messaging cleanup completed")
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except Exception as e:
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logger.error(f"Error during messaging cleanup: {e}")
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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=["*"],
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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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@app.on_event("startup")
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async def startup_event():
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"""Application startup"""
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logger.info("Starting uLunotification Service")
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# Create database tables
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await database_manager.create_tables()
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# Start metrics server
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metrics_collector.start_metrics_server(8080)
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logger.info("uLunotification Service started successfully")
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# Include routers
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app.include_router(notification_router, prefix="/api/v1", tags=["notifications"])
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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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"""Health check endpoint"""
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return {
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"status": "healthy",
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"service": "notification-service",
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"version": "1.0.0"
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}
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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": "notification-service",
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"status": "healthy",
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"version": "1.0.0"
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}
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# Metrics endpoint
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@app.get("/metrics")
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async def metrics():
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"""Prometheus metrics endpoint"""
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if metrics_collector:
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return metrics_collector.generate_latest()
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return {"metrics": "not_available"}
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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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)
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if __name__ == "__main__":
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import uvicorn
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uvicorn.run(app, host="0.0.0.0", port=8000)
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uvicorn.run(app, host="0.0.0.0", port=8000)
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