feat: Add implementation for set_monitoring_transaction_name in DD.

This also refactors the existing NewRelic implementation to use the
backends framework.

Also added comments about not porting ignore_transactions. This way of
ignoring spans is not supported by Datadog.

Author: dianakhuang

CHANGELOG.rst

@@ -11,6 +11,12 @@ Change Log
 
 .. There should always be an "Unreleased" section for changes pending release.
 
+[6.1.0] - 2024-10-15
+---------------------
+Changed
+~~~~~~~
+* Added Datadog implementation of  ``set_monitoring_transaction_name`` and refactored the functionality.
+
 [6.0.0] - 2024-10-09
 ---------------------
 Added

edx_django_utils/__init__.py

@@ -2,7 +2,7 @@
 EdX utilities for Django Application development..
 """
 
-__version__ = "6.0.0"
+__version__ = "6.1.0"
 
 default_app_config = (
     "edx_django_utils.apps.EdxDjangoUtilsConfig"

edx_django_utils/monitoring/README.rst

@@ -32,7 +32,11 @@ Feature support matrix for built-in telemetry backends:
      - ✅
      - ❌
      - ✅
-   * - Retrieve and manipulate spans (``get_current_transaction``, ``ignore_transaction``, ``set_monitoring_transaction_name``)
+   * - Set local root span name (``set_monitoring_transaction_name``)
+     - ✅
+     - ❌
+     - ✅
+   * - Retrieve and manipulate spans (``get_current_transaction``, ``ignore_transaction``)
      - ✅
      - ❌
      - ❌

edx_django_utils/monitoring/__init__.py

@@ -18,15 +18,16 @@
     MonitoringMemoryMiddleware,
     MonitoringSupportMiddleware
 )
-from .internal.transactions import get_current_transaction, ignore_transaction, set_monitoring_transaction_name
+from .internal.transactions import get_current_transaction, ignore_transaction
 from .internal.utils import (
     accumulate,
     background_task,
     function_trace,
     increment,
     record_exception,
     set_custom_attribute,
-    set_custom_attributes_for_course_key
+    set_custom_attributes_for_course_key,
+    set_monitoring_transaction_name
 )
 # "set_custom_metric*" methods are deprecated
 from .utils import set_custom_metric, set_custom_metrics_for_course_key

edx_django_utils/monitoring/internal/backends.py

@@ -70,6 +70,12 @@ def tag_root_span_with_error(self, exception):
         be implemented for OTEL.
         """
 
+    @abstractmethod
+    def set_local_root_span_name(self, name, group=None, priority=None):
+        """
+        Sets the name, group, and priority for a span.
+        """
+
 
 class NewRelicBackend(TelemetryBackend):
     """
@@ -108,6 +114,9 @@ def tag_root_span_with_error(self, exception):
         # Does not need to be implemented for NewRelic, because it is handled automatically.
         pass
 
+    def set_local_root_span_name(self, name, group=None, priority=None):
+        newrelic.agent.set_transaction_name(name, group, priority)
+
 
 class OpenTelemetryBackend(TelemetryBackend):
     """
@@ -137,6 +146,10 @@ def tag_root_span_with_error(self, exception):
         # Currently, this is not implemented for OTel
         pass
 
+    def set_local_root_span_name(self, name, group=None, priority=None):
+        # Currently this is not implemented
+        pass
+
 
 class DatadogBackend(TelemetryBackend):
     """
@@ -165,6 +178,11 @@ def tag_root_span_with_error(self, exception):
         root_span = self.dd_tracer.current_root_span()
         root_span.set_exc_info(type(exception), exception, exception.__traceback__)
 
+    def set_local_root_span_name(self, name, group=None, priority=None):
+        # For Datadog, this updates the 'resource_name' to the given name.
+        local_root_span = self.dd_tracer.current_root_span()
+        local_root_span.resource = name
+
 
 # We're using an lru_cache instead of assigning the result to a variable on
 # module load. With the default settings (pointing to a TelemetryBackend

edx_django_utils/monitoring/internal/transactions.py

@@ -16,24 +16,16 @@
     newrelic = None  # pylint: disable=invalid-name
 
 
-def set_monitoring_transaction_name(name, group=None, priority=None):
-    """
-    Sets the transaction name for monitoring.
-
-    This is not cached, and only support reporting to New Relic.
-
-    """
-    if newrelic:  # pragma: no cover
-        newrelic.agent.set_transaction_name(name, group, priority)
-
-
 def ignore_transaction():
     """
-    Ignore the transaction in monitoring
+    Ignore the transaction in monitoring. Only works for NewRelic.
 
     This allows us to ignore code paths that are unhelpful to include, such as
     `/health/` checks.
+
     """
+    # Note: This is not being ported over to backends, because we don't have
+    # an equivalent for Datadog. For Datadog, use filter/ignore rules.
     if newrelic:  # pragma: no cover
         newrelic.agent.ignore_transaction()
 

edx_django_utils/monitoring/internal/utils.py

@@ -112,6 +112,19 @@ def function_trace(function_name):
         yield
 
 
+def set_monitoring_transaction_name(name, group=None, priority=None):
+    """
+    Sets the name, group, and priority for the current root span.
+
+    Current root span refers to the most ancestral span in the current process, rather than
+    to the trace root, which may be outside of the process.
+
+    Group and priority may not be supported by all backends.
+    """
+    for backend in configured_backends():
+        backend.set_local_root_span_name(name, group=group, priority=priority)
+
+
 def background_task(*args, **kwargs):
     """
     Handles monitoring for background tasks that are not passed in through the web server like