feat(appliance): initial release of MERICA standalone appliance v1.0.0

backend/app/services/metadb_service.py

@@ -0,0 +1,43 @@
+import logging
+from app.core.config import settings
+
+logger = logging.getLogger(__name__)
+
+def save_connection_to_metadb(
+    conn_id: str,
+    conn_type: str,
+    host: str,
+    port: int,
+    schema: str,
+    login: str,
+    password: str = ""
+) -> bool:
+    """Persist custom connection to Airflow metadata database if Airflow & SQLAlchemy are available."""
+    try:
+        from sqlalchemy import create_engine
+        from sqlalchemy.orm import sessionmaker
+
+        engine = create_engine(settings.AIRFLOW_DATABASE_URL)
+        Session = sessionmaker(bind=engine)
+        session = Session()
+        
+        from airflow.models import Connection
+        existing = session.query(Connection).filter(Connection.conn_id == conn_id).first()
+        if not existing:
+            c = Connection(
+                conn_id=conn_id,
+                conn_type=conn_type,
+                host=host,
+                port=port,
+                schema=schema,
+                login=login,
+                password=password
+            )
+            session.add(c)
+            session.commit()
+            logger.info("Connection '%s' saved to Airflow MetaDB", conn_id)
+        session.close()
+        return True
+    except Exception as e:
+        logger.warning("MetaDB Connection Save Note: %s", e)
+        return False