REVE-154 FBE Global Kill Switch

Create a global kill switch for feature based enrollment.  To turn on
the kill switch (and turn off both course duration gating and content
type gating) enable a waffle flag named:
'content_type_gating.global_kill_switch'

openedx/features/content_type_gating/models.py

@@ -17,6 +17,7 @@ from openedx.core.djangoapps.config_model_utils.models import StackedConfigurati
 from openedx.features.content_type_gating.helpers import has_staff_roles
 from openedx.features.course_duration_limits.config import (
     CONTENT_TYPE_GATING_FLAG,
+    FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG,
     EXPERIMENT_ID,
     EXPERIMENT_DATA_HOLDBACK_KEY
 )
@@ -68,6 +69,9 @@ class ContentTypeGatingConfig(StackedConfigurationModel):
             user: The user being queried.
             course_key: The CourseKey of the course being queried.
         """
+        if FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG.is_enabled():
+            return False
+
         if CONTENT_TYPE_GATING_FLAG.is_enabled():
             return True
 
@@ -141,6 +145,10 @@ class ContentTypeGatingConfig(StackedConfigurationModel):
             course_key: The CourseKey of the course being queried.
             target_datetime: The datetime to checked enablement as of. Defaults to the current date and time.
         """
+
+        if FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG.is_enabled():
+            return False
+
         if CONTENT_TYPE_GATING_FLAG.is_enabled():
             return True
 
@@ -161,6 +169,10 @@ class ContentTypeGatingConfig(StackedConfigurationModel):
         Arguments:
             target_datetime (:class:`datetime.datetime`): The datetime that ``enabled_as_of`` must be equal to or before
         """
+
+        if FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG.is_enabled():
+            return False
+
         if CONTENT_TYPE_GATING_FLAG.is_enabled():
             return True
 

openedx/features/content_type_gating/tests/test_models.py

@@ -73,12 +73,9 @@ class TestContentTypeGatingConfig(CacheIsolationTestCase):
             user = self.user
             course_key = self.course_overview.id
 
-        if already_enrolled and pass_enrollment:
-            query_count = 7
-        elif not pass_enrollment and already_enrolled:
-            query_count = 8
-        else:
-            query_count = 7
+        query_count = 8
+        if not pass_enrollment and already_enrolled:
+            query_count = 9
 
         with self.assertNumQueries(query_count):
             enabled = ContentTypeGatingConfig.enabled_for_enrollment(

openedx/features/course_duration_limits/config.py

@@ -19,6 +19,12 @@ CONTENT_TYPE_GATING_FLAG = WaffleFlag(
     flag_undefined_default=False
 )
 
+FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG = WaffleFlag(
+    waffle_namespace=WAFFLE_FLAG_NAMESPACE,
+    flag_name=u'global_kill_switch',
+    flag_undefined_default=False
+)
+
 EXPERIMENT_ID = 11
 EXPERIMENT_DATA_HOLDBACK_KEY = 'holdback'
 

openedx/features/course_duration_limits/models.py

@@ -24,6 +24,7 @@ from openedx.features.content_type_gating.helpers import has_staff_roles
 from openedx.features.content_type_gating.partitions import CONTENT_GATING_PARTITION_ID, CONTENT_TYPE_GATE_GROUP_IDS
 from openedx.features.course_duration_limits.config import (
     CONTENT_TYPE_GATING_FLAG,
+    FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG,
     EXPERIMENT_ID,
     EXPERIMENT_DATA_HOLDBACK_KEY
 )
@@ -95,6 +96,10 @@ class CourseDurationLimitConfig(StackedConfigurationModel):
             user: The user being queried.
             course_key: The CourseKey of the course being queried.
         """
+
+        if FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG.is_enabled():
+            return False
+
         if CONTENT_TYPE_GATING_FLAG.is_enabled():
             return True
 
@@ -163,6 +168,10 @@ class CourseDurationLimitConfig(StackedConfigurationModel):
             course_key: The CourseKey of the course being queried.
             target_datetime: The datetime to checked enablement as of. Defaults to the current date and time.
         """
+
+        if FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG.is_enabled():
+            return False
+
         if CONTENT_TYPE_GATING_FLAG.is_enabled():
             return True
 
@@ -183,6 +192,10 @@ class CourseDurationLimitConfig(StackedConfigurationModel):
         Arguments:
             target_datetime (:class:`datetime.datetime`): The datetime that ``enabled_as_of`` must be equal to or before
         """
+
+        if FEATURE_BASED_ENROLLMENT_GLOBAL_KILL_FLAG.is_enabled():
+            return True
+
         if CONTENT_TYPE_GATING_FLAG.is_enabled():
             return True
 

openedx/features/course_duration_limits/tests/test_models.py

@@ -80,9 +80,9 @@ class TestCourseDurationLimitConfig(CacheIsolationTestCase):
             user = self.user
             course_key = self.course_overview.id
 
-        query_count = 7
+        query_count = 8
         if not pass_enrollment and already_enrolled:
-            query_count = 8
+            query_count = 9
 
         with self.assertNumQueries(query_count):
             enabled = CourseDurationLimitConfig.enabled_for_enrollment(