Add function timing and error logging with unit tests

- Implemented `store_dashboard_time` and `store_dashboard_error` functions to log execution times and errors in the database.
- Added unit tests in `TestStatsQuery` to verify correct timing and error logging for individual, multiple, and faulty function executions.

emission/core/wrapper/entry.py

@@ -60,8 +60,12 @@ def _getData2Wrapper():
             "stats/server_api_error": "statsevent",
             # pipeline stage time, measured on the server
             "stats/pipeline_time": "statsevent",
+            # dashboard time, measured on the server
+            "stats/dashboard_time": "statsevent",
             # intended to log the occurrence of errors in the pipeline
             "stats/pipeline_error": "statsevent",
+            # intended to log the occurrence of errors in the dashboard
+            "stats/dashboard_error": "statsevent",
             # time for various client operations, measured on the client
             # comparison with the server_api_time can help debug networking issues
             "stats/client_time": "statsevent",

emission/pipeline/intake_stage.py

@@ -103,7 +103,7 @@ def run_intake_pipeline_for_user(uuid, skip_if_no_new_data):
             eaum.match_incoming_user_inputs(uuid)
 
         esds.store_pipeline_time(uuid, ecwp.PipelineStages.USER_INPUT_MATCH_INCOMING.name,
-                                 time.time(), uct.elapsed)
+                                 time.time(), uit.elapsed)
 
         # Hack until we delete these spurious entries
         # https://github.com/e-mission/e-mission-server/issues/407#issuecomment-2484868

emission/storage/decorations/stats_queries.py

@@ -2,16 +2,16 @@
 from __future__ import print_function
 from __future__ import division
 from __future__ import absolute_import
+import time
 # Standard imports
 from future import standard_library
 standard_library.install_aliases()
 from builtins import *
-import logging
-import time
 
 # Our imports
 import emission.storage.timeseries.abstract_timeseries as esta
 import emission.core.wrapper.entry as ecwe
+import emission.core.timer as ec_timer
 
 
 # metadata format is 
@@ -46,3 +46,38 @@ def store_stats_entry(user_id, metadata_key, name, ts, reading):
   new_entry = ecwe.Entry.create_entry(user_id, metadata_key, data)
   return esta.TimeSeries.get_time_series(user_id).insert(new_entry)
 
+def store_dashboard_time(code_fragment_name: str, timer: ec_timer.Timer):
+    """
+    Stores statistics about execution times in dashboard code using a Timer object.
+    Both of our current dashboards generate _aggregate_ metrics. We do not work at a per-user level
+    in the Python dashboards, so we pass in only the name of the step being instrumented and the timing information.
+    
+    :param code_fragment_name (str): The name of the function or code fragment being timed.
+    :param timer (ec_timer.Timer): The Timer object that records the execution duration.
+    """
+    # Get the current timestamp in seconds since epoch
+    timestamp = time.time()
+
+    # Call the existing store_stats_entry function
+    store_stats_entry(
+        user_id=None,  # No user ID as per current dashboard design
+        metadata_key="stats/dashboard_time",
+        name=code_fragment_name,
+        ts=timestamp,
+        reading=timer.elapsed_ms
+    )
+
+
+def store_dashboard_error(code_fragment_name: str, timer: ec_timer.Timer):
+    # Get the current timestamp in seconds since epoch
+    timestamp = time.time()
+
+    # Call the existing store_stats_entry function
+    store_stats_entry(
+        user_id=None,  # No user ID as per current dashboard design
+        metadata_key="stats/dashboard_error",
+        name=code_fragment_name,
+        ts=timestamp,
+        reading=timer.elapsed_ms
+    )
+

emission/storage/timeseries/builtin_timeseries.py

@@ -54,6 +54,8 @@ def __init__(self, user_id):
                 "stats/server_api_time": self.timeseries_db,
                 "stats/server_api_error": self.timeseries_db,
                 "stats/pipeline_time": self.timeseries_db,
+                "stats/dashboard_time": self.timeseries_db,
+                "stats/dashboard_error": self.timeseries_db,
                 "stats/pipeline_error": self.timeseries_db,
                 "stats/client_time": self.timeseries_db,
                 "stats/client_nav_event": self.timeseries_db,

emission/tests/storageTests/TestStatsQueries.py

@@ -0,0 +1,157 @@
+import unittest
+import logging
+import time
+
+import emission.core.get_database as edb
+import emission.core.timer as ect
+import emission.storage.decorations.stats_queries as esdsq
+import emission.storage.timeseries.abstract_timeseries as esta
+import emission.tests.common as etc
+
+
+class TestFunctionTiming(unittest.TestCase):
+    @classmethod
+    def setUpClass(self):
+        """
+        Set up resources before any tests are run.
+        """
+        self.timeseries_db = esta.TimeSeries.get_time_series(None)
+
+    def tearDown(self):
+        """
+        Clean up relevant database entries after each test to maintain isolation.
+        """
+        keys_to_clean = ["stats/dashboard_time", "stats/dashboard_error"]
+        edb.get_timeseries_db().delete_many(
+            {"metadata.key": {"$in": keys_to_clean}}
+        )
+        logging.debug(f"After test, cleared DB entries for {keys_to_clean}")
+
+    def verify_stats_entries(self, expected_entries: list[tuple[str, str, float]]):
+        """
+        Verifies that each of the expected entries, in the form of (key, name, elapsed_ms),
+        are stored correctly in the database.
+
+        :param expected_entries: A list of tuples containing (key, name, expected_elapsed_ms).
+        """
+        logging.debug(f"Ensuring {len(expected_entries)} entries exist in DB.")
+        # Prepare keys for database query based on expected entries.
+        key_list = [key for (key, _, _) in expected_entries]
+        # Fetch matching entries from the timeseries database.
+        stored_entrys = list(self.timeseries_db.find_entries(key_list))
+        # Check if the number of retrieved entries matches expectations.
+        self.assertEqual(len(stored_entrys), len(expected_entries))
+
+        # Validate each stored entry against the expected data.
+        for i in range(len(expected_entries)):
+            stored_entry = stored_entrys[i]
+            expected_key, expected_name, expected_reading = expected_entries[i]
+            logging.debug(f"Comparing expected {expected_entries[i]} " +
+                          f"with stored {stored_entry['metadata']['key']} {stored_entry['data']}")
+            # Verify the key matches.
+            self.assertEqual(stored_entry['metadata']['key'], expected_key)
+            # Verify the name matches.
+            self.assertEqual(stored_entry['data']['name'], expected_name)
+            # Verify the elapsed time is as expected.
+            self.assertEqual(stored_entry['data']['reading'], expected_reading)
+
+    def test_single_function_timing(self):
+        """
+        Test the execution and timing of a single function.
+        This test measures how long 'sample_function' takes to execute and verifies
+        that the timing information is correctly stored in the database.
+        """
+        def sample_function():
+            logging.debug("Executing sample_function")
+            time.sleep(2)  # Simulate processing time by sleeping for 2 seconds.
+            return True
+
+        # Measure the execution time of 'sample_function'.
+        with ect.Timer() as timer:
+            sample_function()
+
+        # Record the timing data in the database.
+        esdsq.store_dashboard_time("sample_function", timer)
+
+        # Confirm the timing was recorded correctly.
+        self.verify_stats_entries([
+            ("stats/dashboard_time", "sample_function", timer.elapsed_ms)
+        ])
+
+    def test_multiple_functions_timing(self):
+        """
+        Test the execution and timing of two functions.
+        This test records and validates the time taken for:
+        (i) function_one,
+        (ii) function_two, and
+        (iii) both functions together.
+        """
+        def function_one():
+            # Simulate processing time by sleeping for 1 second.
+            return time.sleep(1)
+
+        def function_two():
+            # Simulate processing time by sleeping for 1.5 seconds.
+            return time.sleep(1.5)
+
+        # Track the total time for both functions.
+        with ect.Timer() as timer_both:
+            # Time 'function_one' execution.
+            with ect.Timer() as timer_one:
+                function_one()
+            # Record 'function_one' timing.
+            esdsq.store_dashboard_time("function_one", timer_one)
+
+            # Time 'function_two' execution.
+            with ect.Timer() as timer_two:
+                function_two()
+            # Record 'function_two' timing.
+            esdsq.store_dashboard_time("function_two", timer_two)
+
+        # Record the combined timing for both functions.
+        esdsq.store_dashboard_time("functions_one_and_two", timer_both)
+
+        # Validate individual and combined timings.
+        self.assertAlmostEqual(timer_one.elapsed_ms, 1000, delta=100)
+        self.assertAlmostEqual(timer_two.elapsed_ms, 1500, delta=100)
+        self.assertAlmostEqual(timer_both.elapsed_ms, 2500, delta=100)
+
+        # Ensure all timing entries are correctly stored.
+        self.verify_stats_entries([
+            ("stats/dashboard_time", "function_one", timer_one.elapsed_ms),
+            ("stats/dashboard_time", "function_two", timer_two.elapsed_ms),
+            ("stats/dashboard_time", "functions_one_and_two", timer_both.elapsed_ms)
+        ])
+
+    def test_faulty_function_timing(self):
+        """
+        Test the execution and timing of a faulty function that is expected to raise an exception.
+        This test ensures that even when a function fails, the timing information is correctly
+        recorded as an error in the database.
+        """
+        def faulty_function():
+            logging.debug("Executing faulty_function")
+            time.sleep(1)  # Simulate processing time before failure.
+            raise ValueError("Simulated error in faulty_function")
+
+        try:
+            # Attempt to execute and time the faulty function.
+            with ect.Timer() as timer:
+                faulty_function()
+        except ValueError as e:
+            # Handle the expected exception and record the timing as an error.
+            logging.info(f"Caught expected error: {e}")
+            esdsq.store_dashboard_error('faulty_function', timer)
+            # Continue after handling the exception.
+            pass
+
+        # Verify that the error timing was recorded.
+        self.verify_stats_entries([
+            ("stats/dashboard_error", "faulty_function", timer.elapsed_ms)
+        ])
+
+
+
+if __name__ == '__main__':
+    etc.configLogging()
+    unittest.main()