OracleDB: add exit_on_error parameter to connect method

mylib/oracle.py

@@ -23,6 +23,18 @@ class OracleDBException(Exception):
         super().__init__(error.format(*args, **kwargs))
 
 
+class OracleDBFailToConnect(OracleDBException, RuntimeError):
+    """
+    Raised on connecting error occurred
+    """
+
+    def __init__(self, dsn, user):
+        super().__init__(
+            "An error occured during Oracle database connection ({user}@{dsn})",
+            user=user, dsn=dsn
+        )
+
+
 class OracleDBDuplicatedSQLParameter(OracleDBException, KeyError):
     """
     Raised when trying to set a SQL query parameter
@@ -72,7 +84,7 @@ class OracleDB:
         self._conn = None
         self.just_try = just_try
 
-    def connect(self):
+    def connect(self, exit_on_error=True):
         """ Connect to Oracle server """
         if self._conn is None:
             log.info('Connect on Oracle server with DSN %s as %s', self._dsn, self._user)
@@ -82,12 +94,15 @@ class OracleDB:
                     password=self._pwd,
                     dsn=self._dsn
                 )
-            except Exception:
+            except Exception as err:
                 log.fatal(
                     'An error occured during Oracle database connection (%s@%s).',
                     self._user, self._dsn, exc_info=1
                 )
-                sys.exit(1)
+                if exit_on_error:
+                    sys.exit(1)
+                else:
+                    raise OracleDBFailToConnect(self._dsn, self._user) from err
         return True
 
     def close(self):