[core] integrate instance config with global configurations

Author: Emanuele Palazzetti

ddtrace/__init__.py

@@ -2,7 +2,7 @@
 from .pin import Pin
 from .span import Span
 from .tracer import Tracer
-from .configuration import Config
+from .settings import Config
 
 __version__ = '0.11.1'
 

ddtrace/config.py

@@ -26,6 +26,18 @@ def __getattr__(self, name):
                 'Integration "{}" is not registered in this configuration'.format(e.message)
             )
 
+    def get_from(self, obj):
+        """Retrieves the configuration for the given object.
+        Any object that has an attached `Pin` must have a configuration
+        and if a wrong object is given, an empty `dict` is returned
+        for safety reasons.
+        """
+        pin = Pin.get_from(obj)
+        if pin is None:
+            return {}
+
+        return pin._config
+
     def _add(self, integration, settings):
         """Internal API that registers an integration with given default
         settings.

ddtrace/configuration.py renamed to ddtrace/settings.py

@@ -3,10 +3,10 @@
 from nose.tools import eq_, ok_, assert_raises
 
 from ddtrace import config as global_config
-from ddtrace.configuration import Config, ConfigException
+from ddtrace.settings import Config, ConfigException
 
 
-class ConfigTestCase(TestCase):
+class GlobalConfigTestCase(TestCase):
     """Test the `Configuration` class that stores integration settings"""
     def setUp(self):
         self.config = Config()

tests/test_configuration.py renamed to tests/test_global_config.py

@@ -6,7 +6,7 @@
 from ddtrace.pin import Pin
 
 
-class ConfigTestCase(TestCase):
+class InstanceConfigTestCase(TestCase):
     """TestCase for the Configuration API that is used to define
     global settings and for each `Pin` instance.
     """