feat: implement Contec patient monitor discovery tool and server framework

background_tasks.py

@@ -0,0 +1,67 @@
+import asyncio
+import logging
+from database import SessionLocal
+from models import VitalReading, TransmissionLog
+from schemas import NormalizedVitals
+from api_client import forward_vitals_to_api
+from config import settings
+
+logger = logging.getLogger(__name__)
+
+async def retry_failed_transmissions():
+    """
+    Background task that periodically checks for untransmitted vital readings
+    and attempts to forward them to the API.
+    """
+    logger.info("Starting background task for retrying failed transmissions...")
+    
+    while True:
+        try:
+            db = SessionLocal()
+            try:
+                # Get readings that haven't been transmitted
+                failed_readings = db.query(VitalReading).filter(VitalReading.transmitted == False).limit(50).all()
+                
+                for reading in failed_readings:
+                    vitals = NormalizedVitals(
+                        device_id=reading.device_id,
+                        patient_id=reading.patient_id,
+                        timestamp=reading.timestamp,
+                        heart_rate=reading.heart_rate,
+                        spo2=reading.spo2,
+                        systolic_bp=reading.systolic_bp,
+                        diastolic_bp=reading.diastolic_bp,
+                        map_bp=reading.map_bp,
+                        respiratory_rate=reading.respiratory_rate,
+                        temperature=reading.temperature
+                    )
+                    
+                    success = await forward_vitals_to_api(vitals)
+                    
+                    if success:
+                        reading.transmitted = True
+                        log_entry = TransmissionLog(
+                            reading_id=reading.id,
+                            status="success",
+                            response_code=200
+                        )
+                        db.add(log_entry)
+                        logger.info(f"Successfully re-transmitted reading {reading.id}")
+                    else:
+                        # Log the failure but don't mark as transmitted
+                        log_entry = TransmissionLog(
+                            reading_id=reading.id,
+                            status="failed",
+                            error_message="Retry failed"
+                        )
+                        db.add(log_entry)
+                        
+                if failed_readings:
+                    db.commit()
+            finally:
+                db.close()
+                
+        except Exception as e:
+            logger.error(f"Error in retry background task: {e}")
+            
+        await asyncio.sleep(settings.retry_interval_seconds)