once again, back to on demand DB connections

src/server.py

@@ -24,7 +24,7 @@
 from src.common.pg_impl import PGImplementation
 
 # set the app version
-APP_VERSION = 'v0.3.2'
+APP_VERSION = 'v0.3.3'
 
 # declare the FastAPI details
 APP = FastAPI(title='APSVIZ UI Data', version=APP_VERSION)
@@ -42,9 +42,6 @@
 # note the extra comma makes this single item a singleton tuple
 db_name: tuple = ('apsviz',)
 
-# create a DB connection object
-db_info: PGImplementation = PGImplementation(db_name, _logger=logger)
-
 
 @APP.get('/get_ui_data', status_code=200, response_model=None)
 async def get_terria_map_catalog_data(grid_type: Union[str, None] = Query(default=None), event_type: Union[str, None] = Query(default=None),
@@ -86,6 +83,9 @@ async def get_terria_map_catalog_data(grid_type: Union[str, None] = Query(defaul
             # add this parm to the list
             kwargs.update({param: 'null' if not locals()[param] else f"'{locals()[param]}'"})
 
+        # create a DB connection object
+        db_info: PGImplementation = PGImplementation(db_name, _logger=logger)
+
         # try to make the call for records
         ret_val: dict = db_info.get_terria_map_catalog_data(**kwargs)
     except Exception:
@@ -154,6 +154,9 @@ async def get_terria_map_catalog_data_file(file_name: Union[str, None] = Query(d
     temp_file_path: str = os.path.join(temp_file_path, file_name)
 
     try:
+        # create a DB connection object
+        db_info: PGImplementation = PGImplementation(db_name, _logger=logger)
+
         # try to make the call for records
         ret_val: dict = db_info.get_terria_map_catalog_data(**kwargs)