Discussion: More helpful error messages for failed AdaptationOffer contributions

[stpotter16]

Preface: The following discussion/"request" could easily be chalked up to "Just be more careful" so feel free to close and move on.

That said, the following code

  contributed_adaptation_offers = List(
        contributes_to=ADAPTATION_OFFERS
    )

    def _contributed_adaptation_offers_default(self):
        return [
            AdaptationOffer(
                factory=...,
                from_protocol=...,
                to_protocl=...,
            )
        ]

created this traceback:

--- Logging error ---
Traceback (most recent call last):
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/logging/__init__.py", line 994, in emit
    msg = self.format(record)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/logging/__init__.py", line 840, in format
    return fmt.format(record)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/logging/__init__.py", line 577, in format
    record.message = record.getMessage()
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/logging/__init__.py", line 338, in getMessage
    msg = msg % self.args
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/traits/adaptation/adaptation_offer.py", line 31, in __repr__
    return (f"<{self.__class__.__name__}: '{self.from_protocol_name}' "
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/traits/adaptation/adaptation_offer.py", line 69, in _get_to_protocol_name
    return self._get_type_name(self._to_protocol)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/traits/adaptation/adaptation_offer.py", line 150, in _get_type_name
    module=type_or_type_name.__module__,
AttributeError: 'NoneType' object has no attribute '__module__'
Call stack:
...
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/ui/tasks/tasks_application.py", line 356, in _create_windows
    window = self.create_window(window_layout, restore=True)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/ui/tasks/tasks_application.py", line 257, in create_window
    task = self.create_task(task_id)
...
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/ui/tasks/tasks_application.py", line 206, in create_task
    for ext in self.task_extensions
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/extension_point.py", line 169, in get
    extensions = extension_registry.get_extensions(self.id)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/extension_registry.py", line 114, in get_extensions
    return self._get_extensions(extension_point_id)[:]
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/provider_extension_registry.py", line 103, in _get_extensions
    extensions = self._initialize_extensions(extension_point_id)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/provider_extension_registry.py", line 289, in _initialize_extensions
    extensions.append(provider.get_extensions(extension_point_id)[:])
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/plugin.py", line 156, in get_extensions
    extensions = self._get_extensions_from_trait(trait_names[0])
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/plugin.py", line 355, in _get_extensions_from_trait
    extensions = getattr(self, trait_name)
...
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/application.py", line 383, in get_service
    protocol, query, minimize, maximize
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/service_registry.py", line 87, in get_service
    services = self.get_services(protocol, query, minimize, maximize)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/service_registry.py", line 124, in get_services
    actual_protocol, name, obj, properties, service_id
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/service_registry.py", line 269, in _resolve_factory
    obj = obj(**properties)
...
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/extension_point.py", line 169, in get
    extensions = extension_registry.get_extensions(self.id)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/application.py", line 213, in get_extensions
    return self.extension_registry.get_extensions(extension_point_id)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/extension_registry.py", line 114, in get_extensions
    return self._get_extensions(extension_point_id)[:]
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/provider_extension_registry.py", line 103, in _get_extensions
    extensions = self._initialize_extensions(extension_point_id)
  File "/home/spotter/.edm/envs/seismic36/lib/python3.6/site-packages/envisage/provider_extension_registry.py", line 291, in _initialize_extensions
    logger.debug("extensions to <%s> <%s>", extension_point_id, extensions)
Unable to print the message and arguments - possible formatting error.
Use the traceback above to help find the error.

No peaking, see if you can spot the error (again it's a case of "Be more careful")

Answer

 
diff --git a/steelhead/plugin/steelhead_plugin.py b/steelhead/plugin/steelhead_plugin.py
index 2a4e533a..75a26646 100644
--- a/steelhead/plugin/steelhead_plugin.py
+++ b/steelhead/plugin/steelhead_plugin.py
@@ -50,6 +50,6 @@ class ZgyPlugin(Plugin):
             AdaptationOffer(
                 factory=ZgyVolumeToISeismicVolume,
                 from_protocol=ZgyVolume,
-                to_protocl=I_SEISMIC_VOLUME,
+                to_protocol=I_SEISMIC_VOLUME,
             )
         ]

So my low priority request is a more useful error message here or more careful parsing of the contents passed into the constructor of AdaptationOffer

[rahulporuri]

This probably belongs in traits - the error, as I understand it, is because AdaptationOffer is a HasTraits and not a HasStrictTraits or a HasRequiredTraits. We should also probably prevent to_protocol and the other related traits not accept None.

Ref https://github.com/enthought/traits/blob/9fbd3fb8f72bf2d2e37675bf5dc6e3983dd1c4a5/traits/adaptation/adaptation_offer.py.

@stpotter16 what do you think?

[stpotter16]

@rahulporuri Good points. I'm okay to move this over to traits, just wanted to log my experience in a publicly visible place.