fix: Metadata has optional

Author: marcosborges

pyctuator/impl/spring_boot_admin_registration.py

@@ -25,7 +25,7 @@ def __init__(
             start_time: datetime,
             service_url: str,
             registration_interval_sec: int,
-            application_metadata: dict
+            application_metadata: Optional[dict] = None
     ) -> None:
         self.registration_url = registration_url
         self.registration_auth = registration_auth
@@ -35,7 +35,7 @@ def __init__(
         self.service_url = service_url if service_url.endswith("/") else service_url + "/"
         self.registration_interval_sec = registration_interval_sec
         self.instance_id = None
-        self.application_metadata = application_metadata
+        self.application_metadata = application_metadata if application_metadata else {}
 
         self.should_continue_registration_schedule: bool = False
         self.disable_certificate_validation_for_https_registration: bool = \

pyctuator/pyctuator.py

@@ -38,7 +38,7 @@ def __init__(
             logfile_max_size: int = 10000,
             logfile_formatter: str = default_logfile_format,
             auto_deregister: bool = True,
-            metadata: dict = None
+            metadata: Optional[dict] = {}
     ) -> None:
         """The entry point for integrating pyctuator with a web-frameworks such as FastAPI and Flask.
 
@@ -91,6 +91,8 @@ def __init__(
 
         self.boot_admin_registration_handler: Optional[BootAdminRegistrationHandler] = None
 
+        self.metadata = metadata
+
         root_logger = logging.getLogger()
         # If application did not initiate logging module, add default handler to root logger
         # logging.info implicitly calls logging.basicConfig(), see logging.basicConfig in Python's documentation.
@@ -121,7 +123,7 @@ def __init__(
                             start_time,
                             app_url,
                             registration_interval_sec,
-                            metadata
+                            self.metadata
                         )
 
                         # Deregister from SBA on exit