Merge branch 'main' into process_resource_attributes

opentelemetry-sdk/src/opentelemetry/sdk/_metrics/_internal/_view_instrument_match.py

@@ -22,6 +22,7 @@
     _Aggregation,
     _convert_aggregation_temporality,
     _PointVarT,
+    _SumAggregation,
 )
 from opentelemetry.sdk._metrics._internal.sdk_configuration import (
     SdkConfiguration,
@@ -52,6 +53,39 @@ def __init__(
         self._attributes_previous_point: Dict[frozenset, _PointVarT] = {}
         self._lock = Lock()
         self._instrument_class_aggregation = instrument_class_aggregation
+        self._name = self._view._name or self._instrument.name
+        self._description = (
+            self._view._description or self._instrument.description
+        )
+        if not isinstance(self._view._aggregation, DefaultAggregation):
+            self._aggregation = self._view._aggregation._create_aggregation(
+                self._instrument
+            )
+        else:
+            self._aggregation = self._instrument_class_aggregation[
+                self._instrument.__class__
+            ]._create_aggregation(self._instrument)
+
+    def conflicts(self, other: "_ViewInstrumentMatch") -> bool:
+        # pylint: disable=protected-access
+
+        result = (
+            self._name == other._name
+            and self._instrument.unit == other._instrument.unit
+            # The aggregation class is being used here instead of data point
+            # type since they are functionally equivalent.
+            and self._aggregation.__class__ == other._aggregation.__class__
+        )
+        if isinstance(self._aggregation, _SumAggregation):
+            result = (
+                result
+                and self._aggregation._instrument_is_monotonic
+                == other._aggregation._instrument_is_monotonic
+                and self._aggregation._instrument_temporality
+                == other._aggregation._instrument_temporality
+            )
+
+        return result
 
     # pylint: disable=protected-access
     def consume_measurement(self, measurement: Measurement) -> None:
@@ -118,14 +152,11 @@ def collect(
 
                     yield Metric(
                         attributes=dict(attributes),
-                        description=(
-                            self._view._description
-                            or self._instrument.description
-                        ),
+                        description=self._description,
                         instrumentation_scope=(
                             self._instrument.instrumentation_scope
                         ),
-                        name=self._view._name or self._instrument.name,
+                        name=self._name,
                         resource=self._sdk_config.resource,
                         unit=self._instrument.unit,
                         point=_convert_aggregation_temporality(

opentelemetry-sdk/src/opentelemetry/sdk/_metrics/_internal/metric_reader_storage.py

@@ -12,21 +12,27 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from logging import getLogger
 from threading import RLock
 from typing import Dict, Iterable, List
 
-from opentelemetry._metrics import Instrument
+from opentelemetry._metrics import Asynchronous, Instrument
 from opentelemetry.sdk._metrics._internal._view_instrument_match import (
     _ViewInstrumentMatch,
 )
-from opentelemetry.sdk._metrics._internal.aggregation import Aggregation
 from opentelemetry.sdk._metrics._internal.sdk_configuration import (
     SdkConfiguration,
 )
 from opentelemetry.sdk._metrics._internal.view import View
+from opentelemetry.sdk._metrics.aggregation import (
+    Aggregation,
+    ExplicitBucketHistogramAggregation,
+)
 from opentelemetry.sdk._metrics.measurement import Measurement
 from opentelemetry.sdk._metrics.point import AggregationTemporality, Metric
 
+_logger = getLogger(__name__)
+
 _DEFAULT_VIEW = View(instrument_name="")
 
 
@@ -40,7 +46,7 @@ def __init__(
     ) -> None:
         self._lock = RLock()
         self._sdk_config = sdk_config
-        self._view_instrument_match: Dict[
+        self._instrument_view_instrument_matches: Dict[
             Instrument, List[_ViewInstrumentMatch]
         ] = {}
         self._instrument_class_aggregation = instrument_class_aggregation
@@ -51,29 +57,20 @@ def _get_or_init_view_instrument_match(
         # Optimistically get the relevant views for the given instrument. Once set for a given
         # instrument, the mapping will never change
 
-        if instrument in self._view_instrument_match:
-            return self._view_instrument_match[instrument]
+        if instrument in self._instrument_view_instrument_matches:
+            return self._instrument_view_instrument_matches[instrument]
 
         with self._lock:
             # double check if it was set before we held the lock
-            if instrument in self._view_instrument_match:
-                return self._view_instrument_match[instrument]
+            if instrument in self._instrument_view_instrument_matches:
+                return self._instrument_view_instrument_matches[instrument]
 
             # not present, hold the lock and add a new mapping
             view_instrument_matches = []
-            for view in self._sdk_config.views:
-                # pylint: disable=protected-access
-                if view._match(instrument):
-                    view_instrument_matches.append(
-                        _ViewInstrumentMatch(
-                            view=view,
-                            instrument=instrument,
-                            sdk_config=self._sdk_config,
-                            instrument_class_aggregation=(
-                                self._instrument_class_aggregation
-                            ),
-                        )
-                    )
+
+            self._handle_view_instrument_match(
+                instrument, view_instrument_matches
+            )
 
             # if no view targeted the instrument, use the default
             if not view_instrument_matches:
@@ -87,7 +84,10 @@ def _get_or_init_view_instrument_match(
                         ),
                     )
                 )
-            self._view_instrument_match[instrument] = view_instrument_matches
+            self._instrument_view_instrument_matches[
+                instrument
+            ] = view_instrument_matches
+
             return view_instrument_matches
 
     def consume_measurement(self, measurement: Measurement) -> None:
@@ -114,7 +114,7 @@ def collect(
         with self._lock:
             for (
                 view_instrument_matches
-            ) in self._view_instrument_match.values():
+            ) in self._instrument_view_instrument_matches.values():
                 for view_instrument_match in view_instrument_matches:
                     metrics.extend(
                         view_instrument_match.collect(
@@ -123,3 +123,72 @@ def collect(
                     )
 
         return metrics
+
+    def _handle_view_instrument_match(
+        self,
+        instrument: Instrument,
+        view_instrument_matches: List["_ViewInstrumentMatch"],
+    ) -> None:
+        for view in self._sdk_config.views:
+            # pylint: disable=protected-access
+            if not view._match(instrument):
+                continue
+
+            if not self._check_view_instrument_compatibility(view, instrument):
+                continue
+
+            new_view_instrument_match = _ViewInstrumentMatch(
+                view=view,
+                instrument=instrument,
+                sdk_config=self._sdk_config,
+                instrument_class_aggregation=(
+                    self._instrument_class_aggregation
+                ),
+            )
+
+            for (
+                existing_view_instrument_matches
+            ) in self._instrument_view_instrument_matches.values():
+                for (
+                    existing_view_instrument_match
+                ) in existing_view_instrument_matches:
+                    if existing_view_instrument_match.conflicts(
+                        new_view_instrument_match
+                    ):
+
+                        _logger.warning(
+                            "Views %s and %s will cause conflicting "
+                            "metrics identities",
+                            existing_view_instrument_match._view,
+                            new_view_instrument_match._view,
+                        )
+
+            view_instrument_matches.append(new_view_instrument_match)
+
+    @staticmethod
+    def _check_view_instrument_compatibility(
+        view: View, instrument: Instrument
+    ) -> bool:
+        """
+        Checks if a view and an instrument are compatible.
+
+        Returns `true` if they are compatible and a `_ViewInstrumentMatch`
+        object should be created, `false` otherwise.
+        """
+
+        result = True
+
+        # pylint: disable=protected-access
+        if isinstance(instrument, Asynchronous) and isinstance(
+            view._aggregation, ExplicitBucketHistogramAggregation
+        ):
+            _logger.warning(
+                "View %s and instrument %s will produce "
+                "semantic errors when matched, the view "
+                "has not been applied.",
+                view,
+                instrument,
+            )
+            result = False
+
+        return result