| // |
| // |
| // Copyright 2022 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // |
| |
| #ifndef GRPCPP_EXT_CALL_METRIC_RECORDER_H |
| #define GRPCPP_EXT_CALL_METRIC_RECORDER_H |
| |
| #include <memory> |
| #include <string> |
| |
| #include "absl/strings/string_view.h" |
| #include "absl/types/optional.h" |
| |
| #include <grpcpp/impl/sync.h> |
| #include <grpcpp/support/slice.h> |
| |
| namespace grpc { |
| namespace experimental { |
| |
| /// Records call metrics for the purpose of load balancing. |
| /// During an RPC, call \a ServerContext::ExperimentalGetCallMetricRecorder() |
| /// method to retrive the recorder for the current call. |
| class CallMetricRecorder { |
| public: |
| virtual ~CallMetricRecorder() = default; |
| |
| /// Records a call metric measurement for CPU utilization. |
| /// Multiple calls to this method will override the stored value. |
| /// Values may be larger than 1.0 when the usage exceeds the reporter |
| /// dependent notion of soft limits. |
| /// Values outside of the valid range [0, infy] are ignored. |
| virtual CallMetricRecorder& RecordCpuUtilizationMetric(double value) = 0; |
| |
| /// Records a call metric measurement for memory utilization. |
| /// Multiple calls to this method will override the stored value. |
| /// Values outside of the valid range [0, 1] are ignored. |
| virtual CallMetricRecorder& RecordMemoryUtilizationMetric(double value) = 0; |
| |
| /// Records a call metric measurement for application specific utilization. |
| /// Multiple calls to this method will override the stored value. |
| /// Values may be larger than 1.0 when the usage exceeds the reporter |
| /// dependent notion of soft limits. |
| /// Values outside of the valid range [0, infy] are ignored. |
| virtual CallMetricRecorder& RecordApplicationUtilizationMetric( |
| double value) = 0; |
| |
| /// Records a call metric measurement for queries per second. |
| /// Multiple calls to this method will override the stored value. |
| /// Values outside of the valid range [0, infy) are ignored. |
| virtual CallMetricRecorder& RecordQpsMetric(double value) = 0; |
| |
| /// Records a call metric measurement for errors per second. |
| /// Multiple calls to this method will override the stored value. |
| /// Values outside of the valid range [0, infy) are ignored. |
| virtual CallMetricRecorder& RecordEpsMetric(double value) = 0; |
| |
| /// Records a call metric measurement for utilization. |
| /// Multiple calls to this method with the same name will |
| /// override the corresponding stored value. The lifetime of the |
| /// name string needs to be longer than the lifetime of the RPC |
| /// itself, since it's going to be sent as trailers after the RPC |
| /// finishes. It is assumed the strings are common names that |
| /// are global constants. |
| /// Values outside of the valid range [0, 1] are ignored. |
| virtual CallMetricRecorder& RecordUtilizationMetric(string_ref name, |
| double value) = 0; |
| |
| /// Records a call metric measurement for request cost. |
| /// Multiple calls to this method with the same name will |
| /// override the corresponding stored value. The lifetime of the |
| /// name string needs to be longer than the lifetime of the RPC |
| /// itself, since it's going to be sent as trailers after the RPC |
| /// finishes. It is assumed the strings are common names that |
| /// are global constants. |
| virtual CallMetricRecorder& RecordRequestCostMetric(string_ref name, |
| double value) = 0; |
| |
| /// Records an application-specific opaque metric measurement. |
| /// Multiple calls to this method with the same name will |
| /// override the corresponding stored value. The lifetime of the |
| /// name string needs to be longer than the lifetime of the RPC |
| /// itself, since it's going to be sent as trailers after the RPC |
| /// finishes. It is assumed the strings are common names that |
| /// are global constants. |
| virtual CallMetricRecorder& RecordNamedMetric(string_ref name, |
| double value) = 0; |
| }; |
| |
| } // namespace experimental |
| } // namespace grpc |
| |
| #endif // GRPCPP_EXT_CALL_METRIC_RECORDER_H |