Add Wallet for Session pool connections in oracle.py (geopython#1768)

* Added Wallet to Connection Pool

* Flake8 changes

* Flake8 changes

* Feedback from Pull Request

* Flake8

Author: Moritz-Langer

docs/source/data-publishing/ogcapi-features.rst

@@ -420,7 +420,7 @@ Configured using environment variables.
    export ORACLE_POOL_MAX=10
 
 
-The ``ORACLE_POOL_MIN`` and ``ORACLE_POOL_MAX`` environment variables are used to trigger session pool creation in the Oracle Provider and the ``DatabaseConnection`` class. See https://python-oracledb.readthedocs.io/en/latest/api_manual/module.html#oracledb.create_pool for documentation of the ``create_pool`` function.
+The ``ORACLE_POOL_MIN`` and ``ORACLE_POOL_MAX`` environment variables are used to trigger session pool creation in the Oracle Provider and the ``DatabaseConnection`` class. Supports auth via user + password or wallet. For an example of the configuration see above at Oracle - Connection. See https://python-oracledb.readthedocs.io/en/latest/api_manual/module.html#oracledb.create_pool for documentation of the ``create_pool`` function.
 
 If none or only one of the environment variables is set, session pooling will not be activated and standalone connections are established at every request.
 

pygeoapi/provider/oracle.py

@@ -66,17 +66,31 @@ def create_pool(cls, conn_dict, oracle_pool_min, oracle_pool_max):
         """Initialize the connection pool for the class
            Lock is implemented before function call at __init__"""
         dsn = cls._make_dsn(conn_dict)
+
+        connect_kwargs = {
+            'dsn': dsn,
+            'min': oracle_pool_min,
+            'max': oracle_pool_max,
+            'increment': 1
+        }
+
         # Create the pool
+        if conn_dict.get("external_auth") == "wallet":
+            # If Auth is via Wallet you need to save a wallet under
+            # the directory returned by this bash command if apache is used
+            # cat /etc/passwd |grep apache
+            # except another directory is specified in the sqlnet.ora file
+            LOGGER.debug("Connection pool from wallet.")
+            connect_kwargs["externalauth"] = True
+            connect_kwargs["homogeneous"] = False
 
-        p = oracledb.create_pool(
-                    user=conn_dict["user"],
-                    password=conn_dict["password"],
-                    dsn=dsn,
-                    min=oracle_pool_min,
-                    max=oracle_pool_max,
-                    increment=1,
-                )
-        LOGGER.debug("Connection pool created successfully.")
+        else:
+            LOGGER.debug("Connection pool from user and password.")
+            connect_kwargs["user"] = conn_dict["user"]
+            connect_kwargs["password"] = conn_dict["password"]
+
+        p = oracledb.create_pool(**connect_kwargs)
+        LOGGER.debug("Connection pool created successfully")
 
         return p