Add datadog instrumentation

apps/openassessment/assessment/models.py

@@ -260,6 +260,19 @@ class Assessment(models.Model):
     def points_possible(self):
         return self.rubric.points_possible
 
+    def to_float(self):
+        """
+        Calculate the score percentage (points earned / points possible).
+
+        Returns:
+            float or None
+
+        """
+        if self.points_possible == 0:
+            return None
+        else:
+            return float(self.points_earned) / self.points_possible
+
     def __unicode__(self):
         return u"Assessment {}".format(self.id)
 

apps/openassessment/assessment/self_api.py

@@ -2,14 +2,12 @@
 Public interface for self-assessment.
 """
 import logging
-from django.core.cache import cache
 from django.utils.translation import ugettext as _
-from submissions.api import (
-    get_submission_and_student, get_submission,
-    SubmissionNotFoundError, SubmissionRequestError
-)
+from dogapi import dog_stats_api
+
+from submissions.api import get_submission_and_student, SubmissionNotFoundError
 from openassessment.assessment.serializers import (
-    AssessmentSerializer, InvalidRubric, RubricSerializer,
+    AssessmentSerializer, InvalidRubric,
     full_assessment_dict, rubric_from_dict, serialize_assessments
 )
 from openassessment.assessment.models import (
@@ -98,22 +96,9 @@ def create_assessment(submission_uuid, user_id, options_selected, rubric_dict, s
     # validation, which would otherwise require two DB queries per
     # option to do validation. We already validated these options above.
     AssessmentPart.add_to_assessment(assessment, option_ids)
-
     assessment_dict = full_assessment_dict(assessment)
+    _log_assessment(assessment, submission)
 
-    logger.info(
-        u"Created self-assessment {assessment_id} for student {user} on "
-        u"submission {submission_uuid}, course {course_id}, item {item_id} "
-        u"with rubric {rubric_content_hash}"
-        .format(
-            assessment_id=assessment.id,
-            user=user_id,
-            submission_uuid=submission_uuid,
-            course_id=submission['student_item']['course_id'],
-            item_id=submission['student_item']['item_id'],
-            rubric_content_hash=rubric.content_hash
-        )
-    )
 
     # Return the serialized assessment
     return assessment_dict
@@ -168,3 +153,42 @@ def is_complete(submission_uuid):
     return Assessment.objects.filter(
         score_type=SELF_TYPE, submission_uuid=submission_uuid
     ).exists()
+
+
+def _log_assessment(assessment, submission):
+    """
+    Log the creation of a self-assessment.
+
+    Args:
+        assessment (Assessment): The assessment model.
+        submission (dict): The serialized submission model.
+
+    Returns:
+        None
+
+    """
+    logger.info(
+        u"Created self-assessment {assessment_id} for student {user} on "
+        u"submission {submission_uuid}, course {course_id}, item {item_id} "
+        u"with rubric {rubric_content_hash}"
+        .format(
+            assessment_id=assessment.id,
+            user=submission['student_item']['student_id'],
+            submission_uuid=submission['uuid'],
+            course_id=submission['student_item']['course_id'],
+            item_id=submission['student_item']['item_id'],
+            rubric_content_hash=assessment.rubric.content_hash
+        )
+    )
+
+    tags = [
+        u"course_id:{course_id}".format(course_id=submission['student_item']['course_id']),
+        u"item_id:{item_id}".format(item_id=submission['student_item']['item_id']),
+        u"type:self"
+    ]
+
+    score_percentage = assessment.to_float()
+    if score_percentage is not None:
+        dog_stats_api.histogram('openassessment.assessment.score_precentage', score_percentage, tags=tags)
+
+    dog_stats_api.increment('openassessment.assessment.count', tags=tags)

apps/openassessment/assessment/test/test_peer.py

@@ -699,7 +699,7 @@ class TestPeerApi(CacheResetTest):
         tim, _ = self._create_student_and_submission("Tim", "Tim's answer")
         peer_api.get_assessments(tim["uuid"])
 
-    @patch.object(Submission.objects, 'get')
+    @patch.object(PeerWorkflow.objects, 'get_or_create')
     @raises(peer_api.PeerAssessmentInternalError)
     def test_error_on_assessment_creation(self, mock_filter):
         mock_filter.side_effect = DatabaseError("Bad things happened")

apps/openassessment/workflow/api.py

@@ -125,7 +125,11 @@ def create_workflow(submission_uuid):
             course_id=submission_dict['student_item']['course_id'],
             item_id=submission_dict['student_item']['item_id'],
         )
-    except (DatabaseError, peer_api.PeerAssessmentError) as err:
+    except (
+        DatabaseError,
+        peer_api.PeerAssessmentError,
+        sub_api.SubmissionError
+    ) as err:
         err_msg = u"Could not create assessment workflow: {}".format(err)
         logger.exception(err_msg)
         raise AssessmentWorkflowInternalError(err_msg)

apps/submissions/api.py

@@ -9,6 +9,7 @@ from django.core.cache import cache
 from django.conf import settings
 from django.db import IntegrityError, DatabaseError
 from django.utils.encoding import force_unicode
+from dogapi import dog_stats_api
 
 from submissions.serializers import (
     SubmissionSerializer, StudentItemSerializer, ScoreSerializer, JsonFieldError
@@ -141,17 +142,7 @@ def create_submission(student_item_dict, answer, submitted_at=None,
         submission_serializer.save()
 
         sub_data = submission_serializer.data
-        logger.info(
-            u"Created submission uuid={submission_uuid} for "
-            u"(course_id={course_id}, item_id={item_id}, "
-            u"anonymous_student_id={anonymous_student_id})"
-            .format(
-                submission_uuid=sub_data["uuid"],
-                course_id=student_item_dict["course_id"],
-                item_id=student_item_dict["item_id"],
-                anonymous_student_id=student_item_dict["student_id"]
-            )
-        )
+        _log_submission(sub_data, student_item_dict)
 
         return sub_data
 
@@ -500,15 +491,81 @@ def set_score(submission_uuid, points_earned, points_possible):
     # In this case, we assume that someone else has already created
     # a score summary and ignore the error.
     try:
-        score.save()
-        logger.info(
-            "Score of ({}/{}) set for submission {}"
-            .format(points_earned, points_possible, submission_uuid)
-        )
+        score_model = score.save()
+        _log_score(score_model)
     except IntegrityError:
         pass
 
 
+def _log_submission(submission, student_item):
+    """
+    Log the creation of a submission.
+
+    Args:
+        submission (dict): The serialized submission model.
+        student_item (dict): The serialized student item model.
+
+    Returns:
+        None
+    """
+    logger.info(
+        u"Created submission uuid={submission_uuid} for "
+        u"(course_id={course_id}, item_id={item_id}, "
+        u"anonymous_student_id={anonymous_student_id})"
+        .format(
+            submission_uuid=submission["uuid"],
+            course_id=student_item["course_id"],
+            item_id=student_item["item_id"],
+            anonymous_student_id=student_item["student_id"]
+        )
+    )
+    tags = [
+        u"course_id:{course_id}".format(course_id=student_item['course_id']),
+        u"item_id:{item_id}".format(item_id=student_item['item_id']),
+        u"item_type:{item_type}".format(item_type=student_item['item_type']),
+    ]
+    dog_stats_api.histogram('submissions.submission.size', len(submission['answer']), tags=tags)
+    dog_stats_api.increment('submissions.submission.count', tags=tags)
+
+
+def _log_score(score):
+    """
+    Log the creation of a score.
+
+    Args:
+        score (Score): The score model.
+
+    Returns:
+        None
+    """
+    logger.info(
+        "Score of ({}/{}) set for submission {}"
+        .format(score.points_earned, score.points_possible, score.submission.uuid)
+    )
+    tags = [
+        u"course_id:{course_id}".format(course_id=score.student_item.course_id),
+        u"item_id:{item_id}".format(item_id=score.student_item.item_id),
+        u"item_type:{item_type}".format(item_type=score.student_item.item_type),
+    ]
+
+    time_delta = score.created_at - score.submission.created_at
+    dog_stats_api.histogram(
+        'submissions.score.seconds_since_submission',
+        time_delta.total_seconds(),
+        tags=tags
+    )
+
+    score_percentage = score.to_float()
+    if score_percentage is not None:
+        dog_stats_api.histogram(
+            'submissions.score.score_percentage',
+            score_percentage,
+            tags=tags
+        )
+
+    dog_stats_api.increment('submissions.score.count', tags=tags)
+
+
 def _get_or_create_student_item(student_item_dict):
     """Gets or creates a Student Item that matches the values specified.
 

pylintrc

@@ -94,6 +94,7 @@ generated-members=
     aq_parent,
     objects,
     DoesNotExist,
+    MultipleObjectsReturned,
     can_read,
     can_write,
     get_url,

requirements/base.txt

@@ -4,6 +4,7 @@ git+https://github.com/edx/xblock-sdk.git@50ed1646d24f6f0a21d6d0bb074e3b7c8a78fd
 
 # Third Party Requirements
 defusedxml==0.4.1
+dogapi==1.2.1
 django==1.4.8
 django-extensions==1.2.5
 django-model-utils==1.4.0